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	<ref name="Roman1987">{{cite journal \| title=Identification of a Constellation From a Position \| last1=Roman \| first1=Nancy G. \| journal=Publications of the Astronomical Society of the Pacific \| volume=99 \| issue=617 \| pages=695–699 \| year=1987 \| bibcode=1987PASP...99..695R \| doi=10.1086/132034 \| doi-access=free }} </ref>		<ref name="Roman1987">{{cite journal \| title=Identification of a Constellation From a Position \| last1=Roman \| first1=Nancy G. \| journal=Publications of the Astronomical Society of the Pacific \| volume=99 \| issue=617 \| pages=695–699 \| year=1987 \| bibcode=1987PASP...99..695R \| doi=10.1086/132034 \| doi-access=free }} </ref>

	<ref name="Simbad XO-2S">{{cite simbad \| title=TYC 3413-210-1 \|~~accessdate~~=2018-01-28}}</ref>		<ref name="Simbad XO-2S">{{cite simbad \| title=TYC 3413-210-1 \|access-date=2018-01-28}}</ref>

	<ref name="Simbad XO-2N">{{cite simbad \| title=TYC 3413-5-1 \|~~accessdate~~=2018-01-28}}</ref>		<ref name="Simbad XO-2N">{{cite simbad \| title=TYC 3413-5-1 \|access-date=2018-01-28}}</ref>

	<ref name="Sing2011">{{cite journal \| title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry \| url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html \| last1=Sing \| first1=D. K. \| last2=Désert \| first2=J.-M. \| last3=Fortney \| first3=J. J. \| last4=Lecavelier Des Etangs \| first4=A. \| last5=Ballester \| first5=G. E. \| last6=Cepa \| first6=J. \| last7=Ehrenreich \| first7=D. \| last8=López-Morales \| first8=M. \| last9=Pont \| first9=F. \| last10=Shabram \| first10=M. \| last11=Vidal-Madjar \| first11=A. \| display-authors=1 \| journal=Astronomy and Astrophysics \| volume=527 \| at=A73 \| year=2011 \| arxiv=1008.4795 \| bibcode=2011A&A...527A..73S \| doi=10.1051/0004-6361/201015579 \| s2cid=56545385 }}</ref>		<ref name="Sing2011">{{cite journal \| title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry \| url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html \| last1=Sing \| first1=D. K. \| last2=Désert \| first2=J.-M. \| last3=Fortney \| first3=J. J. \| last4=Lecavelier Des Etangs \| first4=A. \| last5=Ballester \| first5=G. E. \| last6=Cepa \| first6=J. \| last7=Ehrenreich \| first7=D. \| last8=López-Morales \| first8=M. \| last9=Pont \| first9=F. \| last10=Shabram \| first10=M. \| last11=Vidal-Madjar \| first11=A. \| display-authors=1 \| journal=Astronomy and Astrophysics \| volume=527 \| at=A73 \| year=2011 \| arxiv=1008.4795 \| bibcode=2011A&A...527A..73S \| doi=10.1051/0004-6361/201015579 \| s2cid=56545385 }}</ref>

	<ref name="Simbad XO-2c">{{cite simbad \| title=XO-2c \|~~accessdate~~=2019-06-09}}</ref>		<ref name="Simbad XO-2c">{{cite simbad \| title=XO-2c \|access-date=2019-06-09}}</ref>

	<ref name="Damasso et al">{{cite journal \| title=A comprehensive analysis of the XO-2 stellar and planetary systems \| last1=Damasso \| first1=M. \| last2=Biazzo \| first2=K. \| last3=Bonomo \| first3=A. S. \| last4=Desidera \| first4=S. \| last5=Lanza \| first5=A. F. \| last6=Nascimbeni \| first6=V. \| last7=Esposito \| first7=M. \| last8=Scandariato \| first8=G. \| last9=Sozzetti \| first9=A. \| last10=Cosentino \| first10=R. \| last11=Gratton \| first11=R. \| last12=Malavolta \| first12=L. \| last13=Rainer \| first13=M. \| last14=Gandolfi \| first14=D. \| last15=Poretti \| first15=E. \| last16=Zanmar Sanchez \| first16=R. \| last17=Ribas \| first17=I. \| last18=Santos \| first18=N. \| last19=Affer \| first19=L. \| last20=Andreuzzi \| first20=G. \| last21=Barbieri \| first21=M. \| last22=Bedin \| first22=L. R. \| last23=Benatti \| first23=S. \| last24=Bernagozzi \| first24=A. \| last25=Bertolini \| first25=E. \| last26=Bonavita \| first26=M. \| last27=Borsa \| first27=F. \| last28=Borsato \| first28=L. \| last29=Boschin \| first29=W. \| last30=Calcidese \| first30=P. \| last31=Carbognani \| first31=A. \| last32=Cenadelli \| first32=D. \| last33=Christille \| first33=J. M. \| last34=Claudi \| first34=R. U. \| last35=Covino \| first35=E. \| last36=Cunial \| first36=A. \| last37=Giacobbe \| first37=P. \| last38=Granata \| first38=V. \| last39=Harutyunyan \| first39=A. \| last40=Lattanzi \| first40=M. G. \| last41=Leto \| first41=G. \| last42=Libralato \| first42=M. \| last43=Lodato \| first43=G. \| last44=Lorenzi \| first44=V. \| last45=Mancini \| first45=L. \| last46=Martinez Fiorenzano \| first46=A. F. \| last47=Marzari \| first47=F. \| last48=Masiero \| first48=S. \| last49=Micela \| first49=G. \| last50=Molinari \| first50=E. \| last51=Molinaro \| first51=M. \| last52=Munari \| first52=U. \| last53=Murabito \| first53=S. \| last54=Pagano \| first54=I. \| last55=Pedani \| first55=M. \| last56=Piotto \| first56=G. \| last57=Rosenberg \| first57=A. \| last58=Silvotti \| first58=R. \| last59=Southworth \| first59=J. \| display-authors=1 \| journal=Astronomy & Astrophysics \| volume=575 \| at=A111 \| year=2015 \| doi=10.1051/0004-6361/201425332 \| doi-access=free }}</ref>		<ref name="Damasso et al">{{cite journal \| title=A comprehensive analysis of the XO-2 stellar and planetary systems \| last1=Damasso \| first1=M. \| last2=Biazzo \| first2=K. \| last3=Bonomo \| first3=A. S. \| last4=Desidera \| first4=S. \| last5=Lanza \| first5=A. F. \| last6=Nascimbeni \| first6=V. \| last7=Esposito \| first7=M. \| last8=Scandariato \| first8=G. \| last9=Sozzetti \| first9=A. \| last10=Cosentino \| first10=R. \| last11=Gratton \| first11=R. \| last12=Malavolta \| first12=L. \| last13=Rainer \| first13=M. \| last14=Gandolfi \| first14=D. \| last15=Poretti \| first15=E. \| last16=Zanmar Sanchez \| first16=R. \| last17=Ribas \| first17=I. \| last18=Santos \| first18=N. \| last19=Affer \| first19=L. \| last20=Andreuzzi \| first20=G. \| last21=Barbieri \| first21=M. \| last22=Bedin \| first22=L. R. \| last23=Benatti \| first23=S. \| last24=Bernagozzi \| first24=A. \| last25=Bertolini \| first25=E. \| last26=Bonavita \| first26=M. \| last27=Borsa \| first27=F. \| last28=Borsato \| first28=L. \| last29=Boschin \| first29=W. \| last30=Calcidese \| first30=P. \| last31=Carbognani \| first31=A. \| last32=Cenadelli \| first32=D. \| last33=Christille \| first33=J. M. \| last34=Claudi \| first34=R. U. \| last35=Covino \| first35=E. \| last36=Cunial \| first36=A. \| last37=Giacobbe \| first37=P. \| last38=Granata \| first38=V. \| last39=Harutyunyan \| first39=A. \| last40=Lattanzi \| first40=M. G. \| last41=Leto \| first41=G. \| last42=Libralato \| first42=M. \| last43=Lodato \| first43=G. \| last44=Lorenzi \| first44=V. \| last45=Mancini \| first45=L. \| last46=Martinez Fiorenzano \| first46=A. F. \| last47=Marzari \| first47=F. \| last48=Masiero \| first48=S. \| last49=Micela \| first49=G. \| last50=Molinari \| first50=E. \| last51=Molinaro \| first51=M. \| last52=Munari \| first52=U. \| last53=Murabito \| first53=S. \| last54=Pagano \| first54=I. \| last55=Pedani \| first55=M. \| last56=Piotto \| first56=G. \| last57=Rosenberg \| first57=A. \| last58=Silvotti \| first58=R. \| last59=Southworth \| first59=J. \| display-authors=1 \| journal=Astronomy & Astrophysics \| volume=575 \| at=A111 \| year=2015 \| doi=10.1051/0004-6361/201425332 \| doi-access=free }}</ref>

Revision as of 08:18, 12 January 2021

XO-2
Observation data Epoch 2000 Equinox 2000
Constellation	Lynx
XO-2S
Right ascension	07 48 07.4814
Declination	+50° 13′ 03.2578″
Apparent magnitude (V)	11.12±0.03
XO-2N
Right ascension	07 48 06.4726
Declination	+50° 13′ 32.9211″
Apparent magnitude (V)	11.18±0.03
Characteristics
Spectral type	K0V + K0V
Astrometry
XO-2S
Proper motion (μ)	RA: −29.317±0.063 mas/yr Dec.: −154.398±0.044 mas/yr
Parallax (π)	6.5765 ± 0.0411 mas
Distance	496 ± 3 ly (152.1 ± 1.0 pc)
XO-2N
Proper motion (μ)	RA: −29.731±0.083 mas/yr Dec.: −154.272±0.050 mas/yr
Parallax (π)	6.4539 ± 0.0603 mas
Distance	505 ± 5 ly (155 ± 1 pc)
Details
XO-2S
Mass	0.982 ± 0.034 `M`_☉
Radius	1.02 `R`_☉
Temperature	5399 ± 55 K
Metallicity	0.39 ± 0.05 dex
Age	7.1 ± _−2.9 Gyr
XO-2N
Mass	0.971 ± 0.034 `M`_☉
Radius	0.976 _−0.016 `R`_☉
Temperature	5340 ± 32 K
Metallicity	0.44 ± 0.02 dex
Age	6.3 ± 2.4 Gyr
Other designations

XO-2S: LSPM J0748+5013S, TYC 3413-210-1, GSC 03413-00210, 2MASS J07480748+5013032
XO-2N: LSPM J0748+5013N, TYC 3413-5-1, GSC 03413-00005, 2MASS J07480647+5013328
Database references
SIMBAD	XO-2S
	XO-2N

XO-2 is a binary star. It consists of two components: XO-2S (Also known as XO-2A) and XO-2N (Also known as XO-2B).

This system is located approximately 500 light-years away from Earth in the Lynx constellation. Both of these stars are slightly cooler than the Sun and are nearly identical to each other. The system has a magnitude of 11 and cannot be seen with the naked eye but is visible through a small telescope. These stars are also notable for their large proper motions.

XO-2N and XO-2S have a separation of approximately 4,600 AU.

Planetary systems

There are two known exoplanets orbiting XO-2N. XO-2Nb (or rarely XO-2Bb), which is classified as a hot Jupiter, was discovered by the XO Telescope using the transit method orbiting XO-2N (XO-2B) in 2007 and XO-2Nc was discovered in 2015 using the radial velocity method.

Two planets were reported to orbit around XO-2S in 2014 using radial velocity method. One of them is Jupiter-mass and another has a mass comparable to Saturn.

Both stars also show RV-trends, which may indicate the presence of additional long-periodic jovians or brown dwarfs around each of them.

The XO-2S planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥ 0.259 ± 0.014 M_J	0.1344 ±0.0025	18.157 ± 0.034	0.18 ± 0.035	—	—
c	≥ 1.37 ± 0.053 M_J	0.4756 ±0.0087	120.8 ± 0.034	0.1528 ± 0.01	—	—

The XO-2N planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.62 ± 0.02 M_J	0.0369 ±0.002	2.61586178 ± 0.00000075	0.045 ± 0.024	88.7 ± 1.3°	0.973 ± 0.03 R_J
c	1.8 M_J	—	>6200	—	—	—

References

Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ Burke, Christopher J.; et al. (2007). "XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary". The Astrophysical Journal. 671 (2): 2115–2128. arXiv:0705.0003. Bibcode:2007ApJ...671.2115B. doi:10.1086/523087. S2CID 13468914.
^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ Desidera, S.; et al. (2014). "The GAPS programme with HARPS-N at TNG. IV. A planetary system around XO-2S". Astronomy and Astrophysics. 567 (6). L6. arXiv:1407.0251. Bibcode:2014A&A...567L...6D. doi:10.1051/0004-6361/201424339. S2CID 118567085.
^ Fernandez, Jose M.; et al. (2009). "The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b". The Astronomical Journal. 137 (6): 4911–4916. arXiv:0903.2687. Bibcode:2009AJ....137.4911F. doi:10.1088/0004-6256/137/6/4911. S2CID 7113991.
^ "TYC 3413-210-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-28.
^ "TYC 3413-5-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-28.
Damasso, M.; et al. (2015). "A comprehensive analysis of the XO-2 stellar and planetary systems". Astronomy & Astrophysics. 575. A111. doi:10.1051/0004-6361/201425332.
"XO-2c". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-09.
Narita, Norio; et al. (2011). "XO-2b: a Prograde Planet with a Negligible Eccentricity and an Additional Radial Velocity Variation". Publications of the Astronomical Society of Japan. 63 (6): L67 – L71. arXiv:1110.6136. Bibcode:2011PASJ...63L..67N. doi:10.1093/pasj/63.6.l67. S2CID 119269227.
Sing, D. K.; et al. (2011). "Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry". Astronomy and Astrophysics. 527. A73. arXiv:1008.4795. Bibcode:2011A&A...527A..73S. doi:10.1051/0004-6361/201015579. S2CID 56545385.

External links

NASA PlanetQuest: Planet race heats up: 1 month, 32 discoveries
"XO-2". Exoplanets. Retrieved 2009-04-28.

Constellation of Lynx

Stars

Bayer	α ψ Aur (16)
Flamsteed	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 (Alsciaukat) 32 33 34 35 36 38 42 43 44 Cam 45 Cam 46 Cam 48 Cam 50 Cam 52 Cam 54 Cam 5 LMi 10 UMa 19 UMa
Variable	R T U Y RR SW SZ TT TV TZ UU UV UX UY AN BE BF BH BK BO CC CY DD DI DU
HR	2463 2486 2561 2642 2645 2721 2737 2751 2776 2804 2844 2894 2903 2914 2915 2935 2939 3028 3039 3094 3106 3130 3175 3181 3200 3246 3258 3277 3287 3292 3309 3348 3351 3360 3509 3511 3545 3546 3580 3586 3612 3625 3686 3701 3809
HD	44061 48948 52859 58681 59721 59826 63588 63630 65392 67539 75898 (Stribor)
Other	GD 98 Gliese 277 GJ 1105 GJ 3421 HS 0702+6043 IRC +60169 J0815+4729 PG 0859+415 WASP-13 (Gloas) XO-2 XO-4 (Koit) XO-5 (Absolutno)

Exoplanets	6 Lyncis b WASP-13b (Cruinlagh) XO-2Nb XO-4b (Hämarik) XO-5b (Makropulos)

Star clusters	NGC 2666

Nebulae	Jones-Emberson 1 Lynx Arc

Galaxies

NGC

2273
2273B
2308
2315
2320
2321
2322
2326
2326A
2329
2330
2332
2337
2340
2344
2415
2424
2426
2429
2429A
2429B
2431
2444
2445
2446
2456
2457
2458
2461
2462
2463
2468
2469
2472
2473
2474
2475
2476
2484
2488
2493
2495
2497
2500
2505
2518
2519
2521
2524
2528
2532
2534
2537
2537A
2541
2543
2549
2552
2638
2649
2668
2683
2691
2704
2712
2719
2719A
2724
2746
2755
2759
2770
2776
2778
2779
2780
2782
2785
2793
2798
2799
2823
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2838
2839
2840
2844
2852
2853
2860

Other

Galaxy clusters	2XMM J083026+524133 Abell 569 Abell 576 Lynx Supercluster NGC 2841 group

Astronomical events	SN 2007uy SN 2008D

Revision as of 19:25, 5 January 2021 editMonkbot (talk \| contribs)Bots3,695,952 editsm Task 18 (cosmetic): eval 8 templates: hyphenate params (1×);Tag: AWB ← Previous edit		Revision as of 08:18, 12 January 2021 edit undoMonkbot (talk \| contribs)Bots3,695,952 editsm Task 18 (cosmetic): eval 13 templates: hyphenate params (3×);Tag: AWB Next edit →
Line 141:		Line 141:
	<ref name="Roman1987">{{cite journal \| title=Identification of a Constellation From a Position \| last1=Roman \| first1=Nancy G. \| journal=Publications of the Astronomical Society of the Pacific \| volume=99 \| issue=617 \| pages=695–699 \| year=1987 \| bibcode=1987PASP...99..695R \| doi=10.1086/132034 \| doi-access=free }} </ref>		<ref name="Roman1987">{{cite journal \| title=Identification of a Constellation From a Position \| last1=Roman \| first1=Nancy G. \| journal=Publications of the Astronomical Society of the Pacific \| volume=99 \| issue=617 \| pages=695–699 \| year=1987 \| bibcode=1987PASP...99..695R \| doi=10.1086/132034 \| doi-access=free }} </ref>

	<ref name="Simbad XO-2S">{{cite simbad \| title=TYC 3413-210-1 \|~~accessdate~~=2018-01-28}}</ref>		<ref name="Simbad XO-2S">{{cite simbad \| title=TYC 3413-210-1 \|access-date=2018-01-28}}</ref>

	<ref name="Simbad XO-2N">{{cite simbad \| title=TYC 3413-5-1 \|~~accessdate~~=2018-01-28}}</ref>		<ref name="Simbad XO-2N">{{cite simbad \| title=TYC 3413-5-1 \|access-date=2018-01-28}}</ref>

	<ref name="Sing2011">{{cite journal \| title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry \| url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html \| last1=Sing \| first1=D. K. \| last2=Désert \| first2=J.-M. \| last3=Fortney \| first3=J. J. \| last4=Lecavelier Des Etangs \| first4=A. \| last5=Ballester \| first5=G. E. \| last6=Cepa \| first6=J. \| last7=Ehrenreich \| first7=D. \| last8=López-Morales \| first8=M. \| last9=Pont \| first9=F. \| last10=Shabram \| first10=M. \| last11=Vidal-Madjar \| first11=A. \| display-authors=1 \| journal=Astronomy and Astrophysics \| volume=527 \| at=A73 \| year=2011 \| arxiv=1008.4795 \| bibcode=2011A&A...527A..73S \| doi=10.1051/0004-6361/201015579 \| s2cid=56545385 }}</ref>		<ref name="Sing2011">{{cite journal \| title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry \| url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html \| last1=Sing \| first1=D. K. \| last2=Désert \| first2=J.-M. \| last3=Fortney \| first3=J. J. \| last4=Lecavelier Des Etangs \| first4=A. \| last5=Ballester \| first5=G. E. \| last6=Cepa \| first6=J. \| last7=Ehrenreich \| first7=D. \| last8=López-Morales \| first8=M. \| last9=Pont \| first9=F. \| last10=Shabram \| first10=M. \| last11=Vidal-Madjar \| first11=A. \| display-authors=1 \| journal=Astronomy and Astrophysics \| volume=527 \| at=A73 \| year=2011 \| arxiv=1008.4795 \| bibcode=2011A&A...527A..73S \| doi=10.1051/0004-6361/201015579 \| s2cid=56545385 }}</ref>

	<ref name="Simbad XO-2c">{{cite simbad \| title=XO-2c \|~~accessdate~~=2019-06-09}}</ref>		<ref name="Simbad XO-2c">{{cite simbad \| title=XO-2c \|access-date=2019-06-09}}</ref>

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