(308933) 2006 SQ372: Difference between revisions
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mass, period, aphelion |
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|accessdate=2008-08-19}}</ref> |
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| epoch = [[May 14]] [[2008]] |
| epoch = [[May 14]] [[2008]] |
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| aphelion = |
| aphelion = 2140.3432310 [[Astronomical unit|AU]] (Q) |
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| perihelion = 24.17 AU (q) |
| perihelion = 24.17 AU (q) |
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| semimajor = 1014.777 AU (a) |
| semimajor = 1014.777 AU (a) |
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| eccentricity = 0.976 |
| eccentricity = 0.976 |
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| period = |
| period = 35607.89 [[Julian year (astronomy)|a]] |
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| avg_speed = |
| avg_speed = |
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| inclination = 19.46[[degree (angle)|°]] |
| inclination = 19.46[[degree (angle)|°]] |
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|url=http://neo.jpl.nasa.gov/glossary/h.html |
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|accessdate=2008-08-30}}</ref> |
|accessdate=2008-08-30}}</ref> |
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| mass = |
| mass = ~1.7{{Esp|18}} kg |
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| density = |
| density = |
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| surface_grav = |
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Revision as of 10:11, 30 September 2009
| Discovery | |
|---|---|
| Discovered by | Andrew Becker, Nathan Kaib |
| Discovery date | September 27, 2006 |
| Designations | |
Designation | 2006 SQ372 |
| Scattered disc[1][2] Centaur (DES)[3] | |
| Orbital characteristics[1] | |
| Epoch May 14 2008 | |
| Aphelion | 2140.3432310 AU (Q) |
| Perihelion | 24.17 AU (q) |
| 1014.777 AU (a) | |
| Eccentricity | 0.976 |
| 35607.89 a | |
| 0.01969° (M) | |
| Inclination | 19.46° |
| 197.36° | |
| 122.34° | |
| Physical characteristics | |
| Dimensions | 50 - 100 km[4] |
| Mass | ~1.7 kg |
| 8.1[1] | |
2006 SQ372 is a small trans-Neptunian object discovered through the Sloan Digital Sky Survey by Andrew Becker, Nathan Kaib and coworkers on images first taken on September 27, 2006 (with precovery images dated to September 13, 2005).[5][6]
It has a strongly eccentric orbit, crossing that of Neptune near perihelion but bringing it more than 2,000 AU from the Sun at aphelion. Its orbit takes between 22,000 and 32,000 years to complete. In this respect it is similar to 90377 Sedna or (148209) 2000 CR105. However, having a diameter between 50 and 100 km, it is much smaller (similar in size to 2060 Chiron) and it could possibly be a comet. The discoverers hypothesize that the object could come from the inner Oort cloud,[7] however other scientists like California Institute of Technology's Mike Brown also consider other possibilities, as "it may have formed from debris just beyond Neptune [in the Kuiper belt] and been 'kicked' into its distant orbit by a planet like Neptune or Uranus".[8]
Perturbation
More than half of the simulations of 2006 SQ372 show that it gets too close to either Uranus or Neptune within the next 180 million years sending it in a currently unknown direction.[9] This makes it difficult to classify this object as only a centaur or a scattered disc object. The Minor Planet Center (MPC), which officially catalogues all trans-Neptunian objects, lists centaurs and SDOs together.[2] (29981) 1999 TD10 is another such object that blurs the two categories.[10]
References
- ^ a b c "JPL Small-Body Database Browser: (2006 SQ372)". 2008-07-31 last obs. Retrieved 2008-08-19.
{{cite web}}: Check date values in:|date=(help) - ^ a b "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2008-09-06.
- ^ Marc W. Buie (2008-08-29). "Orbit Fit and Astrometric record for 06SQ372". SwRI (Space Science Department). Retrieved 2008-09-05.
- ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2008-08-30.
- ^ An Icy Wanderer from the Oort Cloud
- ^ "First object seen from solar system's inner Oort cloud". New Scientist. 18 August 2008. Retrieved 2008-08-18.
{{cite news}}: Check date values in:|date=(help) - ^ Kaib, Nathan A. (2009). "2006 SQ372: A Likely Long-Period Comet from the Inner Oort Cloud".
{{cite journal}}: Cite journal requires|journal=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ "New "Minor Planet" Found in Solar System". National Geographic News. 19 August 2008. Retrieved 2008-08-18.
{{cite news}}: Check date values in:|date=(help) - ^ Dr Chris Lintott (25 August 2008). "Sky survey yields new cosmic haul". BBC. Retrieved 2008-09-06.
- ^ Kenneth Silber (1999-11-11). "New Object in Solar System Defies Categories". Space.com. Retrieved 2008-09-07.
External links
- "MPEC 2007-A27: 2006 SQ372". Minor Planet Electronic Circulars. 2007-01-08.
- (308933) 2006 SQ372 at the JPL Small-Body Database
- Orbital simulation from JPL (Java) / Ephemeris
