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Time of discovery of asteroids which passed within 1 lunar distance from Earth in 2023

After closest approach: 34 (51.5%)   < 24 hours before: 7 (10.6%)   up to 7 days before: 23 (34.8%)   > one week before: 2 (3.0%)   > 7 weeks before: 0 (0.0%)   > one year before: 0 (0.0%) Other Years 2021, 2022, 2023, 2024, 2025

Below is the list of asteroids that have come close to Earth in 2023.

Timeline of known close approaches less than one lunar distance from Earth

A list of known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2023. As most asteroids passing within a lunar distance are less than 40 meters in diameter, they generally are not detected until they are within several million km of Earth. Objects coming from the direction of the Sun may not be publicly announced until a few days after closest approach. For example, 2023 AC₁ was first imaged six hours after closest approach, then confirmed by other observations, but not officially announced until 3.5 days after closest approach. 2023 MD₄ that approached from the direction of the Sun was not first observed until 3.6 days after closest approach. The largest asteroid on this list that is risk–listed is 2023 SM₅ at about 17 meters in diameter with a 3.5-day observation arc and a 1:91000 chance of Earth impact on 2118 September 24.

For reference, the radius of Earth is about 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 lunar distances. Geosynchronous satellites have an orbit with semi-major axis length of 0.000282 AU (42,200 km; 26,200 mi) or 0.110 lunar distances.

  Rows highlighted red indicate objects which were not discovered until after closest approach

  Rows highlighted yellow indicate objects discovered less than 24 hours before closest approach

  Rows highlighted green indicate objects discovered more than one week before closest approach

  Rows highlighted turquoise indicate objects discovered more than 7 weeks before closest approach

  Rows highlighted blue indicate objects discovered more than one year before closest approach (i.e.
objects successfully cataloged on a previous orbit, rather than being detected during final approach)

Warning times by size

This sub-section visualises the warning times of the close approaches listed in the above table, depending on the size of the asteroid. The sizes of the charts show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based the absolute magnitude of each asteroid, an approximate measure of size based on brightness.

Absolute magnitude 30 and greater

(size of a person for comparison)

Absolute magnitude 29-30

Absolute magnitude 28-29

Absolute magnitude 27-28

Absolute magnitude 26-27

Absolute magnitude 25-26

Absolute magnitude less than 25 (largest)

•   After closest approach: 0 (0.0%)
•   < 24 hours before: 0 (0.0%)
•   up to 7 days before: 0 (0.0%)
•   > one week before: 1 (100.0%)
•   > 7 weeks before: 0 (0.0%)
•   > one year before: 0 (0.0%)

Notes

1. ^ 2023 MD₄ came to perihelion on 20 May 2023 and approached from the direction of the Sun. It made Earth closest approach at 20 June 2023 18:10 UT and was discovered 85.4 hours (3.56 d) later at 24 June 2023 07:36 UT.
2. Discovery date (first reported image), and if the object was confirmed and previously undiscovered, the discoverer
3. Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km (0.0166 LD).
4. Objects that approached closer to the Moon than Earth are marked with a check.
5. 2023 BJ₇ passed 12,884 ± 334 km (8,006 ± 208 mi) from the centerpoint of the Moon around 30 January 2023 13:34 UT. Since the Moon has a radius of about 1,738 km (1,080 mi), it passed approximately 11,146 ± 334 km (6,926 ± 208 mi) from the surface of the Moon.

Beyond 1 LD

Below is an example list of near-Earth asteroids that nominally will pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2023. During 2022, over 1,000 asteroids passed within 10 LD (3.8 million km) of Earth.

  Rows highlighted grey indicate a planet or main-belt asteroid

  Rows highlighted green indicate a comet which may have a larger uncertainty region due to non-gravitational forces from outgassing (sublimation).
It is also more difficult to make astrometric measurements of the precise location of the nucleus because it is masked by a fuzzy coma.

  Rows highlighted yellow indicate short arc objects that have not been observed for years and therefore the uncertainty in the approach distance and date are large

  Rows highlighted cyan indicate objects that had a short observation arc with large uncertainties that were recovered and their orbits greatly refined

  Rows highlighted red indicate objects which are risk–listed with a virtual impactor near this date

Notes

1. The uncertainty region for 2022 YY₆ on 2023-Jan-02 was ±6500 km.
2. 2012 BV₁₃ was recovered by WISE in October 2022 and followed up by several observatories in January 2023.
3. The uncertainty region for 2012 BV₁₃ on 2023-Jan-16 was ±103 km.
4. was 0.43–40 (5 LD nominal) before recovery on 14 January 2023 by Pan-STARRS 2
5. The uncertainty region for C/2022 E3 (ZTF) on 2023-Feb-01 was ±500 km.
6. 2011 AG₅ brightened to about apmag 14.2 on 2023-Feb-02.
7. The uncertainty region for 2005 YY₁₂₈ on 2023-Feb-16 was ±10 km. It brightened to about apmag 13.2 on 2023-Feb-14.
8. At the start of the year 2020 DG₄ had the closest known nominal approach to Earth in 2023 at 1.4 LD.
9. was 1.2–11 (1.4 LD nominal) before recovery on 22 February 2023 by ATLAS South Africa
10. The uncertainty region for 1993 VB on 2023-Feb-21 was ±57 km. It brightened to about apmag 14.5 on 2023-Feb-25.
11. The uncertainty region for 2023 FM on 2023-Apr-06 is ±3200 km. It brightened to apmag 14.8 on 2023-Apr-04.
12. The uncertainty region for 364P/PANSTARRS on 2023-Apr-07 is ±47 km.
13. The uncertainty region for 2012 KY₃ on 2023-Apr-13 was ±305 km. It brightened to apmag 14.2 on 2023-Apr-16.
14. The uncertainty region for 2006 HV₅ on 2023-Apr-26 is ±36 km. It brightened to apmag 15.3 on 2023-Apr-24.
15. Mercury also will pass 260.9 LD from Earth on January 8, 244.4 LD from Earth on September 3, and 263.2 LD from Earth on December 23. Mercury makes a closest approach to Earth about every 116 days.
16. The asteroid with the greatest chance of impacting Earth in 2023 is 2016 LP₁₀ (4-meters in diameter) with less than a 1-day observation arc. It has a 1:53,000 chance of impact on 10 June 2023, but is expected to be around 0.63 AU (94 million km; 250 LD) from Earth on that date at a basically undetectable apparent magnitude of 31. Such an impact would be similar to 2008 TC3.
17. The uncertainty region for 1994 XD on 2023-Jun-12 is ±17 km. It is expected to brighten to apmag 13.5 on 2023-Jun-10 and best seen from the Northern hemisphere.
18. The uncertainty region for 2020 DB₅ on 2023-Jun-15 is ±51 km. It is expected to brighten to apmag 13.8 on 2023-Jun-14 and best seen from the Southern hemisphere.
19. The uncertainty region for 2020 HO₆ on 2023-Jul-05 is ±700 km. It is expected to brighten to apmag 13.5 on 2023-Jul-05 and best seen from the Southern hemisphere.
20. For comparison as the closest Venus approach is 2023-Aug-13 at 0.2887 AU (112.4 LD).
21. was 4.3–8.7 (4.3 LD nominal) before recovery on 19 June 2023 by Canada–France–Hawaii Telescope
22. The uncertainty region for 103P/Hartley on 2023-Sep-26 is ±310 km.
23. The uncertainty region for 1998 HH₄₉ on 2023-Oct-17 is ±471 km.
24. The uncertainty region for C/2023 H2 (Lemmon) on 2023-Nov-10 is ±57000 km. It might brighten to magnitude 10, but will stay within 75 degrees of the Sun when brightest.

See also

• List of asteroid close approaches to Earth
• List of asteroid close approaches to Earth in 2022
• List of asteroid close approaches to Earth in 2024
• Asteroid impact prediction

References

1. ^ "NEO Earth Close Approaches". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 3 March 2021.
2. "MPEC 2023-A70 : 2023 AC1". Minor Planet Electronic Circular. Minor Planet Center. 2023-01-15. Retrieved 2023-01-16. (15th 15:14 – 12th 03:37 = 3d 11h 37m = ~3.5 days)
3. Sentry Risk Table: 2023 SM5
4. "JPL Small-Body Database Browser: (2023 AC1)". Jet Propulsion Laboratory. Retrieved 16 January 2023.
5. "2023 AC1". Minor Planet Center. International Astronomical Union. Retrieved 16 January 2023.
6. The uncertainty region for 2023 AC₁ on 2023-Jan-12 was ±1083 km.
7. "JPL Small-Body Database Browser: (2023 AV)". Jet Propulsion Laboratory. Retrieved 14 January 2023.
8. "2023 AV". Minor Planet Center. International Astronomical Union. Retrieved 14 January 2023.
9. The uncertainty region for 2023 AV on 2023-Jan-12 was ±393 km.
10. "JPL Small-Body Database Browser: (2023 BY2)". Jet Propulsion Laboratory. Retrieved 26 January 2023.
11. "2023 BY2". Minor Planet Center. International Astronomical Union. Retrieved 25 January 2023.
12. The uncertainty region for 2023 BY₂ on 2023-Jan-21 was ±283 km.
13. "JPL Small-Body Database Browser: (2023 BX5)". Jet Propulsion Laboratory. Retrieved 29 January 2023.
14. "2023 BX5". Minor Planet Center. International Astronomical Union. Retrieved 29 January 2023.
15. The uncertainty region for 2023 BX₅ on 2023-Jan-25 was ±642 km.
16. "JPL Small-Body Database Browser: (2023 BL1)". Jet Propulsion Laboratory. Retrieved 24 January 2023.
17. "2023 BL1". Minor Planet Center. International Astronomical Union. Retrieved 24 January 2023.
18. The uncertainty region for 2023 BL₁ on 2023-Jan-25 was ±236 km.
19. "JPL Small-Body Database Browser: (2023 BL2)". Jet Propulsion Laboratory. Retrieved 25 January 2023.
20. "2023 BL2". Minor Planet Center. International Astronomical Union. Retrieved 25 January 2023.
21. The uncertainty region for 2023 BL₂ on 2023-Jan-26 was ±474 km.
22. "JPL Small-Body Database Browser: (2023 BU)". Jet Propulsion Laboratory. Retrieved 22 January 2023.
23. "2023 BU". Minor Planet Center. International Astronomical Union. Retrieved 22 January 2023.
24. The uncertainty region for 2023 BU on 2023-Jan-27 was ±2 km.
25. "JPL Small-Body Database Browser: (2023 BZ3)". Jet Propulsion Laboratory. Retrieved 28 January 2023.
26. "2023 BZ3". Minor Planet Center. International Astronomical Union. Retrieved 28 January 2023.
27. The uncertainty region for 2023 BZ₃ on 2023-Jan-27 was ±665 km.
28. "JPL Small-Body Database Browser: (2023 CK)". Jet Propulsion Laboratory. Retrieved 4 February 2023.
29. "2023 CK". Minor Planet Center. International Astronomical Union. Retrieved 4 February 2023.
30. The uncertainty region for 2023 CK on 2023-Jan-30 was ±234 km.
31. "JPL Small-Body Database Browser: (2023 BJ7)". Jet Propulsion Laboratory. Retrieved 1 February 2023.
32. "2023 BJ7". Minor Planet Center. International Astronomical Union. Retrieved 1 February 2023.
33. The uncertainty region for 2023 BJ₇ on 2023-Jan-30 was ±525 km.
34. "JPL Small-Body Database Browser: (2023 CG4)". Jet Propulsion Laboratory. Retrieved 22 February 2023.
35. "2023 CG4". Minor Planet Center. International Astronomical Union. Retrieved 22 February 2023.
36. The uncertainty region for 2023 CG₄ on 2023-Feb-09 was ±5086 km. It was observed 2.53 days after closest approach and there were only 10 observations.
37. "JPL Small-Body Database Browser: (2023 CX1)". Jet Propulsion Laboratory. Retrieved 1 February 2023.
38. "2023 CX1". Minor Planet Center. International Astronomical Union. Retrieved 1 February 2023.
39. "JPL Small-Body Database Browser: (2023 DR)". Jet Propulsion Laboratory. Retrieved 26 February 2023.
40. "2023 DR". Minor Planet Center. International Astronomical Union. Retrieved 26 February 2023.
41. The uncertainty region for 2023 DR on 2023-Feb-25 was ±65 km.
42. "JPL Small-Body Database Browser: (2023 EN)". Jet Propulsion Laboratory. Retrieved 12 March 2023.
43. "2023 EN". Minor Planet Center. International Astronomical Union. Retrieved 12 March 2023.
44. The uncertainty region for 2023 EN on 2023-Mar-09 was ±260 km.
45. "JPL Small-Body Database Browser: (2023 ET2)". Jet Propulsion Laboratory. Retrieved 17 March 2023.
46. "2023 ET2". Minor Planet Center. International Astronomical Union. Retrieved 17 March 2023.
47. The uncertainty region for 2023 ET₂ on 2023-Mar-12 was ±3292 km.
48. "JPL Small-Body Database Browser: (2023 EY)". Jet Propulsion Laboratory. Retrieved 17 March 2023.
49. "2023 EY". Minor Planet Center. International Astronomical Union. Retrieved 17 March 2023.
50. The uncertainty region for 2023 EY on 2023-Mar-17 was ±152 km.
51. "JPL Small-Body Database Browser: (2023 FO)". Jet Propulsion Laboratory. Retrieved 20 March 2023.
52. "2023 FO". Minor Planet Center. International Astronomical Union. Retrieved 20 March 2023.
53. The uncertainty region for 2023 FO on 2023-Mar-19 was ±662 km.
54. "JPL Small-Body Database Browser: (2023 FN6)". Jet Propulsion Laboratory. Retrieved 30 March 2023.
55. "2023 FN6". Minor Planet Center. International Astronomical Union. Retrieved 30 March 2023.
56. The uncertainty region for 2023 FN₆ on 2023-Mar-25 was ±426 km.
57. "JPL Small-Body Database Browser: (2023 DZ2)". Jet Propulsion Laboratory. Retrieved 17 March 2023.
58. "2023 DZ2". Minor Planet Center. International Astronomical Union. Retrieved 17 March 2023.
59. The uncertainty region for 2023 DZ₂ on 2023-Mar-25 (as known at the time of closest approach) was ±27 km.
60. "JPL Small-Body Database Browser: (2023 FH7)". Jet Propulsion Laboratory. Retrieved 30 March 2023.
61. "2023 FH7". Minor Planet Center. International Astronomical Union. Retrieved 30 March 2023.
62. The uncertainty region for 2023 FH₇ on 2023-Mar-30 was ±358 km.
63. "JPL Small-Body Database Browser: (2023 GQ)". Jet Propulsion Laboratory. Retrieved 13 April 2023.
64. "2023 GQ". Minor Planet Center. International Astronomical Union. Retrieved 13 April 2023.
65. The uncertainty region for 2023 GQ on 2023-Apr-11 was ±142 km.
66. "JPL Small-Body Database Browser: (2023 GP3)". Jet Propulsion Laboratory. Retrieved 8 May 2023.
67. "2023 GP3". Minor Planet Center. International Astronomical Union. Retrieved 8 May 2023.
68. The uncertainty region for 2023 GP₃ on 2023-Apr-11 was ±908 km.
69. "JPL Small-Body Database Browser: (2023 HE)". Jet Propulsion Laboratory. Retrieved 17 April 2023.
70. "2023 HE". Minor Planet Center. International Astronomical Union. Retrieved 17 April 2023.
71. The uncertainty region for 2023 HE on 2023-Apr-14 was ±719 km.
72. "JPL Small-Body Database Browser: (2023 HZ)". Jet Propulsion Laboratory. Retrieved 18 April 2023.
73. "2023 HZ". Minor Planet Center. International Astronomical Union. Retrieved 18 April 2023.
74. The uncertainty region for 2023 HZ on 2023-Apr-15 was ±1156 km.
75. "JPL Small-Body Database Browser: (2023 HB)". Jet Propulsion Laboratory. Retrieved 17 April 2023.
76. "2023 HB". Minor Planet Center. International Astronomical Union. Retrieved 17 April 2023.
77. The uncertainty region for 2023 HB on 2023-Apr-17 was ±754 km.
78. "JPL Small-Body Database Browser: (2023 HH)". Jet Propulsion Laboratory. Retrieved 17 April 2023.
79. "2023 HH". Minor Planet Center. International Astronomical Union. Retrieved 17 April 2023.
80. The uncertainty region for 2023 HH on 2023-Apr-18 was ±153 km.
81. "JPL Small-Body Database Browser: (2023 HT)". Jet Propulsion Laboratory. Retrieved 18 April 2023.
82. "2023 HT". Minor Planet Center. International Astronomical Union. Retrieved 18 April 2023.
83. The uncertainty region for 2023 HT on 2023-Apr-18 was ±150 km.
84. "JPL Small-Body Database Browser: (2023 HK)". Jet Propulsion Laboratory. Retrieved 18 April 2023.
85. "2023 HK". Minor Planet Center. International Astronomical Union. Retrieved 18 April 2023.
86. The uncertainty region for 2023 HK on 2023-Apr-20 was ±655 km.
87. "JPL Small-Body Database Browser: (2023 HW3)". Jet Propulsion Laboratory. Retrieved 25 April 2023.
88. "2023 HW3". Minor Planet Center. International Astronomical Union. Retrieved 25 April 2023.
89. The uncertainty region for 2023 HW₃ on 2023-Apr-23 was ±261 km.
90. "JPL Small-Body Database Browser: (2023 HD7)". Jet Propulsion Laboratory. Retrieved 1 May 2023.
91. "2023 HD7". Minor Planet Center. International Astronomical Union. Retrieved 1 May 2023.
92. The uncertainty region for 2023 HW₃ on 2023-Apr-23 was ±269 km.
93. "JPL Small-Body Database Browser: (2023 JO)". Jet Propulsion Laboratory. Retrieved 12 May 2023.
94. "2023 JO". Minor Planet Center. International Astronomical Union. Retrieved 12 May 2023.
95. The uncertainty region for 2023 JO on 2023-May-09 was ±3596 km.
96. "JPL Small-Body Database Browser: (2023 JF)". Jet Propulsion Laboratory. Retrieved 12 May 2023.
97. "2023 JF". Minor Planet Center. International Astronomical Union. Retrieved 12 May 2023.
98. The uncertainty region for 2023 JF on 2023-May-09 was ±177 km.
99. "JPL Small-Body Database Browser: (2023 JA3)". Jet Propulsion Laboratory. Retrieved 19 May 2023.
100. "2023 JA3". Minor Planet Center. International Astronomical Union. Retrieved 19 May 2023.
101. The uncertainty region for 2023 JA₃ on 2023-May-12 was ±523 km.
102. "JPL Small-Body Database Browser: (2023 KT)". Jet Propulsion Laboratory. Retrieved 28 May 2023.
103. "2023 KT". Minor Planet Center. International Astronomical Union. Retrieved 28 May 2023.
104. The uncertainty region for 2023 KT on 2023-May-17 was ±279 km.
105. "JPL Small-Body Database Browser: (2023 KS)". Jet Propulsion Laboratory. Retrieved 28 May 2023.
106. "2023 KS". Minor Planet Center. International Astronomical Union. Retrieved 28 May 2023.
107. The uncertainty region for 2023 KS on 2023-May-22 was ±334 km.
108. "JPL Small-Body Database Browser: (2023 KK4)". Jet Propulsion Laboratory. Retrieved 13 June 2023.
109. "2023 KK4". Minor Planet Center. International Astronomical Union. Retrieved 13 June 2023.
110. The uncertainty region for 2023 KK₄ on 2023-May-27 was ±1419 km.
111. "JPL Small-Body Database Browser: (2023 KU4)". Jet Propulsion Laboratory. Retrieved 13 June 2023.
112. "2023 KU4". Minor Planet Center. International Astronomical Union. Retrieved 13 June 2023.
113. The uncertainty region for 2023 KU₄ on 2023-May-27 was ±627 km.
114. "JPL Small-Body Database Browser: (2023 LC)". Jet Propulsion Laboratory. Retrieved 13 June 2023.
115. "2023 LC". Minor Planet Center. International Astronomical Union. Retrieved 13 June 2023.
116. The uncertainty region for 2023 LC on 2023-Jun-07 was ±89 km.
117. "JPL Small-Body Database Browser: (2023 LS)". Jet Propulsion Laboratory. Retrieved 13 June 2023.
118. "2023 LS". Minor Planet Center. International Astronomical Union. Retrieved 13 June 2023.
119. The uncertainty region for 2023 LS on 2023-Jun-09 was ±49 km.
120. "JPL Small-Body Database Browser: (2023 LP1)". Jet Propulsion Laboratory. Retrieved 15 June 2023.
121. "2023 LP1". Minor Planet Center. International Astronomical Union. Retrieved 15 June 2023.
122. The uncertainty region for 2023 LP₁ on 2023-Jun-13 was ±496 km.
123. "JPL Small-Body Database Browser: (2023 LZ)". Jet Propulsion Laboratory. Retrieved 13 June 2023.
124. "2023 LZ". Minor Planet Center. International Astronomical Union. Retrieved 13 June 2023.
125. The uncertainty region for 2023 LZ on 2023-Jun-14 was ±612 km.
126. "JPL Small-Body Database Browser: (2023 LM1)". Jet Propulsion Laboratory. Retrieved 15 June 2023.
127. "2023 LM1". Minor Planet Center. International Astronomical Union. Retrieved 15 June 2023.
128. The uncertainty region for 2023 LM₁ on 2023-Jun-15 was ±99 km.
129. "JPL Small-Body Database Browser: (2023 LE2)". Jet Propulsion Laboratory. Retrieved 24 June 2023.
130. "2023 LE2". Minor Planet Center. International Astronomical Union. Retrieved 24 June 2023.
131. The uncertainty region for 2023 LE₂ on 2023-Jun-17 was ±80 km.
132. "JPL Small-Body Database Browser: (2023 MB3)". Jet Propulsion Laboratory. Retrieved 24 June 2023.
133. "2023 MB3". Minor Planet Center. International Astronomical Union. Retrieved 24 June 2023.
134. The uncertainty region for 2023 MB₃ on 2023-Jun-20 was ±188 km.
135. "JPL Small-Body Database Browser: (2023 MD4)". Jet Propulsion Laboratory. Retrieved 25 June 2023.
136. "2023 MD4". Minor Planet Center. International Astronomical Union. Retrieved 25 June 2023.
137. The uncertainty region for 2023 MD₄ on 2023-Jun-20 was ±1570 km.
138. "JPL Small-Body Database Browser: (2023 MW2)". Jet Propulsion Laboratory. Retrieved 24 June 2023.
139. "2023 MW2". Minor Planet Center. International Astronomical Union. Retrieved 24 June 2023.
140. The uncertainty region for 2023 MW₂ on 2023-Jun-23 was ±62 km.
141. "JPL Small-Body Database Browser: (2023 ML3)". Jet Propulsion Laboratory. Retrieved 24 June 2023.
142. "2023 ML3". Minor Planet Center. International Astronomical Union. Retrieved 24 June 2023.
143. The uncertainty region for 2023 ML₃ on 2023-Jun-24 was ±315 km.
144. "JPL Small-Body Database Browser: (2023 MU2)". Jet Propulsion Laboratory. Retrieved 24 June 2023.
145. "2023 MU2". Minor Planet Center. International Astronomical Union. Retrieved 24 June 2023.
146. The uncertainty region for 2023 MU₂ on 2023-Jun-25 was ±102 km.
147. "JPL Small-Body Database Browser: (2023 NO)". Jet Propulsion Laboratory. Retrieved 12 July 2023.
148. "2023 NO". Minor Planet Center. International Astronomical Union. Retrieved 12 July 2023.
149. The uncertainty region for 2023 NO on 2023-Jul-05 was ±1915 km.
150. "JPL Small-Body Database Browser: (2023 NT1)". Jet Propulsion Laboratory. Retrieved 17 July 2023.
151. "2023 NT1". Minor Planet Center. International Astronomical Union. Retrieved 17 July 2023.
152. The uncertainty region for 2023 NT1 on 2023-Jul-13 was ±135 km.
153. "JPL Small-Body Database Browser: (2023 QY)". Jet Propulsion Laboratory. Retrieved 24 August 2023.
154. "2023 QY". Minor Planet Center. International Astronomical Union. Retrieved 24 August 2023.
155. The uncertainty region for 2023 QY on 2023-Aug-18 was ±654 km.
156. "JPL Small-Body Database Browser: (2023 QS1)". Jet Propulsion Laboratory. Retrieved 24 August 2023.
157. "2023 QS1". Minor Planet Center. International Astronomical Union. Retrieved 24 August 2023.
158. The uncertainty region for 2023 QS₁ on 2023-Aug-19 was ±115 km.
159. "JPL Small-Body Database Browser: (2023 QR)". Jet Propulsion Laboratory. Retrieved 24 August 2023.
160. "2023 QR". Minor Planet Center. International Astronomical Union. Retrieved 24 August 2023.
161. The uncertainty region for 2023 QR on 2023-Aug-20 was ±241 km.
162. "JPL Small-Body Database Browser: (2023 RM16)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
163. "2023 RM16". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
164. The uncertainty region for 2023 RM₁₆ on 2023-Sep-05 was ±832 km.
165. "JPL Small-Body Database Browser: (2023 RS)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
166. "2023 RS". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
167. The uncertainty region for 2023 RS on 2023-Sep-07 was ±13 km.
168. "JPL Small-Body Database Browser: (2023 RG22)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
169. "2023 RG22". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
170. The uncertainty region for 2023 RG₂₂ on 2023-Sep-07 was ±7613 km.
171. "JPL Small-Body Database Browser: (2023 RY2)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
172. "2023 RY2". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
173. The uncertainty region for 2023 RY₂ on 2023-Sep-08 was ±431 km.
174. "JPL Small-Body Database Browser: (2023 RK5)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
175. "2023 RK5". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
176. The uncertainty region for 2023 RK₅ on 2023-Sep-09 was ±449 km.
177. "JPL Small-Body Database Browser: (2023 RR5)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
178. "2023 RR5". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
179. The uncertainty region for 2023 RR₅ on 2023-Sep-13 was ±121 km.
180. "JPL Small-Body Database Browser: (2023 SR5)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
181. "2023 SR5". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
182. The uncertainty region for 2023 SR₅ on 2023-Sep-16 was ±1233 km.
183. "JPL Small-Body Database Browser: (2023 SC2)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
184. "2023 SC2". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
185. The uncertainty region for 2023 SC₂ on 2023-Sep-18 was ±411 km.
186. "JPL Small-Body Database Browser: (2023 SN1)". Jet Propulsion Laboratory. Retrieved 27 September 2023.
187. "2023 SN1". Minor Planet Center. International Astronomical Union. Retrieved 27 September 2023.
188. The uncertainty region for 2023 SN₁ on 2023-Sep-20 was ±390 km.
189. "JPL Small-Body Database Browser: (2023 SL5)". Jet Propulsion Laboratory. Retrieved 28 September 2023.
190. "2023 SL5". Minor Planet Center. International Astronomical Union. Retrieved 28 September 2023.
191. The uncertainty region for 2023 SL₅ on 2023-Sep-20 was ±206 km.
192. "JPL Small-Body Database Browser: (2023 SM5)". Jet Propulsion Laboratory. Retrieved 28 September 2023.
193. "2023 SM5". Minor Planet Center. International Astronomical Union. Retrieved 28 September 2023.
194. The uncertainty region for 2023 SM₅ on 2023-Sep-23 is 1327±km.
195. "JPL Small-Body Database Browser: (2023 SP3)". Jet Propulsion Laboratory. Retrieved 28 September 2023.
196. "2023 SP3". Minor Planet Center. International Astronomical Union. Retrieved 28 September 2023.
197. The uncertainty region for 2023 SP₃ on 2023-Sep-24 was ±247 km.
198. "JPL Small-Body Database Browser: (2023 SH7)". Jet Propulsion Laboratory. Retrieved 29 September 2023.
199. "2023 SH7". Minor Planet Center. International Astronomical Union. Retrieved 28 September 2023.
200. The uncertainty region for 2023 SH₇ on 2023-Sep-25 was ±35 km.

v t e 2023 in space
« 2022 2024 »
Space probe launches	Jupiter Icy Moons Explorer (April 2023) Chandrayaan-3 (July 2023) Luna 25 (August 2023) XRISM (September 2023) SLIM (September 2023) Psyche (October 2023)
Impact events	2023 CX1
Selected NEOs	Asteroid close approaches 2023 AV 2023 BU (367789) 2011 AG5 2023 DW 2023 DZ2 2023 GQ2 (164121) 2003 YT1 (341843) 2008 EV5 2023 FW13
Discoveries	F200DB-045 Rings of Quaoar WISE J0336−0143 CEERS 1019 black hole UHZ1 quasar Volcanism on Venus confirmation 3 moons of Jupiter 63 moons of Saturn SN 2023ixf supernova in Pinwheel Galaxy (M101) SN H0pe supernova in Constellation Ursa Major Phosphates on Enceladus Gravitational wave background detection Neutrino Milky Way map GRB 230307A Second-brightest gamma-ray burst 152830 Dinkinesh is a binary Ursa Major III Exoplanets HD 110067 b c d e f g LHS 475 b TOI-672 b TOI-700 e TOI-3235 b WASP-193b Silicates in VHS J1256–1257 b No atmosphere in TRAPPIST-1b No atmosphere in TRAPPIST-1c K2-18b of methane and carbon dioxide
Comets	C/2022 E3 (ZTF) 96P/Machholz C/2023 A3 (Tsuchinshan–ATLAS) C/2023 E1 (ATLAS) C/2021 T4 (Lemmon) C/2023 P1 (Nishimura) 103P/Hartley 2P/Encke C/2023 H2 (Lemmon) 62P/Tsuchinshan 12P/Pons–Brooks brightening multiple times
Space exploration	Lucy (Dinkinesh flyby; November 2023) OSIRIS-REx (sample return from asteroid Bennu; September 2023) First space-based solar power demonstration Euclid Space telescope (launch; 1 July 2023)
Outer space portal Category:2022 in outer space — Category:2023 in outer space — Category:2024 in outer space

• Earth-crossing asteroids
• Near-Earth objects in 2023
• Lists of asteroids
• Near-Earth asteroids