(174567) 2003 MW12
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Discovery[2]
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| Discovered by | J. A. Larsen[1] |
| Discovery date | June 21, 2003 |
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Designations
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| MPC designation | 2003 MW12 |
| Alternate name(s) | none |
| Minor planet category |
TNO (cubewano)[3] SCATEXTD[4] |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 7 821.517 Gm (52.284 AU) |
| Perihelion | 5 927.302 Gm (39.622 AU) |
| Semi-major axis | 6 874.410 Gm (45.953 AU) |
| Eccentricity | 0.138 |
| Orbital period | 113 779.342 d (311.51 a) |
| Average orbital speed | 4.37 km/s |
| Mean anomaly | 257.434° |
| Inclination | 21.494° |
| Longitude of ascending node | 184.009° |
| Argument of perihelion | 181.811° |
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Physical characteristics
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| Dimensions | 500–1130 km[2][5] 838 km (assumed)[6] |
| Mass | 6.1×1020? kg (assumed) |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.2138? m/s² |
| Escape velocity | 0.4044? km/s |
| Sidereal rotation period |
5.9 h[2] |
| Albedo | 0.09? (assumed) |
| Temperature | ~41 K |
| Apparent magnitude | 20.5[7] |
| Absolute magnitude (H) | 3.4[2] |
(174567) 2003 MW12 is a trans-Neptunian object with an absolute magnitude of 3.4.[2] It is highly likely a dwarf planet. It was discovered on June 21, 2003 by Jeffrey A. Larsen with the Spacewatch telescope.[8]
It is currently 47.5 AU from the Sun,[7] and will come to perihelion around November 2096.[4][9] It has been observed 68 times over 14 oppositions with precovery images back to 1980.[2]
Mike Brown's website lists it as a highly likely dwarf planet, but the diameter of the object has never been measured.[10]
[edit] References
- ^ List Of Transneptunian Objects
- ^ a b c d e f g "JPL Small-Body Database Browser: 174567 (2003 MW12)". 2007-06-14 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=174567. Retrieved 2008-12-08.
- ^ "MPEC 2009-P26 :Distant Minor Planets (2009 AUG. 17.0 TT)". Minor Planet Center. 2009-08-07. http://www.cfa.harvard.edu/mpec/K09/K09P26.html. Retrieved 2009-08-24.
- ^ a b Marc W. Buie (2008-04-15). "Orbit Fit and Astrometric record for 174567". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/174567.html. Retrieved 2009-08-24.
- ^ "Absolute Magnitude (H)". NASA/JPL. http://neo.jpl.nasa.gov/glossary/h.html. Retrieved 2008-12-07.
- ^ Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 2008-12-07.
- ^ a b "AstDys (174567) 2003MW12 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. http://www.webcitation.org/query?id=1240086946004946. Retrieved 2009-03-22.
- ^ Larsen, Jeffrey A.; Roe, Eric S.; Albert, C. Elise et al. (2007). "The Search for Distant Objects in the Solar System Using Spacewatch". The Astronomical Journal 133 (4): 1247–1270. Bibcode 2007AJ....133.1247L. DOI:10.1086/511155.
- ^ "HORIZONS Web-Interface". JPL Solar System Dynamics. http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=174567. Retrieved 2009-08-24.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. http://www.gps.caltech.edu/~mbrown/dps.html. Retrieved 2011-08-25.
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
- (174567) 2003 MW12 Precovery Images
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