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| Brown's website lists it as ] to be a ].<ref name="Brown-dplist"> | Brown's website lists it as ] to be a ].<ref name="Brown-dplist"> | ||
| {{cite web | {{cite web | ||
| |title=How many dwarf planets are there in the outer solar system? (updates daily) | |title=How many dwarf planets are there in the outer solar system? (updates daily) | ||
| |publisher=California Institute of Technology | |publisher=California Institute of Technology | ||
| |author=Michael E. Brown | |author=Michael E. Brown | ||
| |author-link=Michael E. Brown | |author-link=Michael E. Brown | ||
| |url=http://www.gps.caltech.edu/~mbrown/dps.html | |url=http://www.gps.caltech.edu/~mbrown/dps.html | ||
| |accessdate=2011-08-25 | |accessdate=2011-08-25 | ||
| |deadurl=yes | |||
| |archiveurl=https://web.archive.org/web/20111018154917/http://www.gps.caltech.edu/~mbrown/dps.html | |||
| |archivedate=2011-10-18 | |||
| |df= | |||
| }} | }} | ||
| </ref> The ] estimated it to have a diameter of {{val|726|123|u=km}}.<ref name=Spitzer2007/> The Herschel team estimates it to be {{val|934|47|u=km}}, which would make it one of the 10 largest TNOs currently known<ref name=TNOsCool6 /> and large enough to be considered a dwarf planet under the ] of the ].<ref name=IAU-draft2006> | </ref> The ] estimated it to have a diameter of {{val|726|123|u=km}}.<ref name=Spitzer2007/> The Herschel team estimates it to be {{val|934|47|u=km}}, which would make it one of the 10 largest TNOs currently known<ref name=TNOsCool6 /> and large enough to be considered a dwarf planet under the ] of the ].<ref name=IAU-draft2006> | ||
Revision as of 23:13, 3 September 2016
| Discovery | |
|---|---|
| Discovered by | Chad Trujillo, Michael E. Brown |
| Discovery date | 18 June 2002 |
| Designations | |
| MPC designation | 2002 MS4 |
| Alternative designations | none |
| Minor planet category | Cubewano (MPC) ScatExt (DES) |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 20569 days (56.31 yr) |
| Aphelion | 47.740 AU (7.1418 Tm) |
| Perihelion | 35.694 AU (5.3397 Tm) |
| Semi-major axis | 41.717 AU (6.2408 Tm) |
| Eccentricity | 0.14439 |
| Orbital period (sidereal) | 269.45 yr (98415.8 d) |
| Average orbital speed | 4.58 km/s |
| Mean anomaly | 216.187° |
| Mean motion | 0° 0 13.168 / day |
| Inclination | 17.677° |
| Longitude of ascending node | 215.963° |
| Argument of perihelion | 215.534° |
| Earth MOID | 34.7228 AU (5.19446 Tm) |
| Jupiter MOID | 30.7148 AU (4.59487 Tm) |
| TJupiter | 5.464 |
| Physical characteristics | |
| Dimensions | 934±47 km |
| Geometric albedo | 0.051+0.036 −0.022 |
| Temperature | ≈ 43 K |
| Spectral type | B−V=0.69; V−R=0.38 |
| Apparent magnitude | 20.6 |
| Absolute magnitude (H) | 3.7 3.5±0.4 (R-band) |
(307261) 2002 MS4 is a large classical Kuiper belt object, the second-largest known object in the Solar System without a name, after 2007 OR10. It was discovered in 2002 by Chad Trujillo and Michael Brown.
Brown's website lists it as nearly certain to be a dwarf planet. The Spitzer Space Telescope estimated it to have a diameter of 726±123 km. The Herschel team estimates it to be 934±47 km, which would make it one of the 10 largest TNOs currently known and large enough to be considered a dwarf planet under the 2006 draft proposal of the IAU. It is currently 47.2 AU from the Sun and will come to perihelion in 2123.
It has been observed 55 times, with precovery images back to 1954.
References
- "MPEC 2002-W27 : 2002 MS4, 2002 QX47, 2002 VR128". IAU Minor Planet Center. 2002-11-21. Retrieved 2009-08-26.
- ^ "MPEC 2009-P26 :Distant Minor Planets (2009 AUG. 17.0 TT)". IAU Minor Planet Center. 2009-08-07. Retrieved 2009-08-31.
- Marc W. Buie (2008-05-03). "Orbit Fit and Astrometric record for 02MS4". SwRI (Space Science Department). Archived from the original on 29 June 2011. Retrieved 2009-08-31.
- ^ "JPL Small-Body Database Browser: 307261 (2002 MS4)" (2009-09-19 last obs.). Jet Propulsion Laboratory. Retrieved 7 April 2016.
- ^ Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2012). ""TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects". Astronomy & Astrophysics. 541: A94. arXiv:1204.0697. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201118743.
- Tegler, Stephen C. (2006-01-26). "Kuiper Belt Object Magnitudes and Surface Colors". Archived from the original on 1 September 2006. Retrieved 2006-11-05.
- ^
"AstDyS 2002MS4 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-09-04. Retrieved 2009-08-27.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) -
Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2011-08-25.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv
- O. Gingerich (2006). "The Path to Defining Planets" (PDF). Harvard-Smithsonian Center for Astrophysics and IAU EC Planet Definition Committee chair. Retrieved 2007-03-13.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2002 MS4 Precovery Images
- (307261) 2002 MS4 at the JPL Small-Body Database
_(cropped).jpg)
| Small Solar System bodies | |||||||
|---|---|---|---|---|---|---|---|
| Minor planets |
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| Comets | |||||||
| Other | |||||||
| Trans-Neptunian objects | |
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| TNO classes | |
| Dwarf planets (moons) | |
| Sednoids | |