(307261) 2002 MS4
| Discovery[1] | |
|---|---|
| Discovered by |
Chad Trujillo, Michael E. Brown |
| Discovery date | 18 June 2002 |
| Designations | |
| MPC designation | 2002 MS4 |
| Alternative names | none |
| Minor planet category |
Cubewano (MPC)[2] ScatExt (DES)[3] |
| Orbital characteristics[4] | |
| Epoch June 18, 2009 (2455000.5) | |
| Aphelion |
47.858 AU (7159.4 Gm) |
| Perihelion |
36.004 AU (5386.1 Gm) |
| Semi-major axis |
41.931 AU (6272.7 Gm) |
| Eccentricity | 0.14135 |
| Orbital period | 271.53 yr |
| Average orbital speed | 4.58 km/s |
| Mean anomaly | 210.108° |
| Inclination | 17.693° |
| Longitude of ascending node | 216.086° |
| Argument of perihelion | 213.200° |
| Physical characteristics | |
| Dimensions |
934±47 km[5] 726 ± 123 km[6] |
| Albedo |
0.051+.036 −.022[5] 0.084+.03 −.02[6] |
| Temperature | ≈43 K |
| Spectral type |
B−V=0.69; V−R=0.38[7] |
| Apparent magnitude | 20.6[8] |
| Absolute magnitude (H) | 3.8[4] |
|
| |
(307261) 2002 MS4 is a large trans-Neptunian object (TNO), 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 E. Brown. It is classified as a cubewano by the Minor Planet Center.[2]
Mike Brown's website lists it as nearly certain to be a dwarf planet.[9] The Spitzer Space Telescope estimated it to have a diameter of 726 ± 123 km.[6] The Herschel team estimates it to be 934 ± 47 km, which would make it one of the 10 largest TNOs currently known,[5] and easily large enough to be accepted as a dwarf planet under the 2006 draft proposal of the IAU.[10] It is currently 47.2 AU from the Sun,[8] and will come to perihelion around 2122.[4]
It has been observed 46 times, with precovery images back to 1954.[4]
References
- ↑ "MPEC 2002-W27 : 2002 MS4, 2002 QX47, 2002 VR128". IAU Minor Planet Center. 2002-11-21. Retrieved 2009-08-26.
- ↑ 2.0 2.1 "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 using 46 of 46 observations). "Orbit Fit and Astrometric record for 02MS4". SwRI (Space Science Department). Retrieved 2009-08-31.
- ↑ 4.0 4.1 4.2 4.3 "JPL Small-Body Database Browser: (2002 MS4)". 2008-05-03 last obs. Retrieved 2009-08-24.
- ↑ 5.0 5.1 5.2 Vilenius, E., Kiss, C., Mommert, M. et al. (April 4, 2012). ""TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects". Retrieved 2012-05-07.
- ↑ 6.0 6.1 6.2 Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv
- ↑ 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.
- ↑ 8.0 8.1 "AstDyS 2002MS4 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-09-04. Retrieved 2009-08-27.
- ↑ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2011-08-25.
- ↑ 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
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