Astronomy:2002 CY248
| Discovery [1][2] | |
|---|---|
| Discovered by | M. W. Buie |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 6 February 2002 (first observed only) |
| Designations | |
| 2002 CY248 | |
| Minor planet category | TNO [3] · cubewano [4][5] p-DP [6] · distant [1] |
| Orbital characteristics [3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 12.96 yr (4,733 days) |
| |{{{apsis}}}|helion}} | 53.081 AU |
| |{{{apsis}}}|helion}} | 39.404 AU |
| 46.243 AU | |
| Eccentricity | 0.1479 |
| Orbital period | 314.47 yr (114,859 d) |
| Mean anomaly | 233.51° |
| Mean motion | 0° 0m 11.16s / day |
| Inclination | 7.0487° |
| Longitude of ascending node | 300.74° |
| 336.77° | |
| Physical characteristics | |
| Mean diameter | 404 km[5] 449 km[6] |
| Geometric albedo | 0.06 (assumed)[6] 0.09 (assumed)[5] |
| Absolute magnitude (H) | 5.2[3] · 5.5[6] |
2002 CY248 is a trans-Neptunian object and weak dwarf-planet candidate from the classical Kuiper belt in the outermost region of the Solar System, approximately 400–450 kilometers (250–280 mi) in diameter. It was first observed on 6 February 2002, by American astronomer Marc Buie at the Kitt Peak National Observatory in Arizona, United States.[1]
Orbit and classification
2002 CY248 orbits the Sun at a distance of 39.4–53.1 AU once every 314 years and 6 months (114,859 days; semi-major axis of 46.2 AU). Its orbit has an eccentricity of 0.15 and an inclination of 7° with respect to the ecliptic.[3] The body's observation arc begins at Kitt Peak with its official first observation on 6 February 2002.[1] A 10-million-year integration of the orbit shows that it is a Classical Kuiper belt object that does not get closer to the Sun than 38.8 astronomical unit|AU (5.80 billion km) or further than 54 AU.[4]
Physical characteristics
Based on an absolute magnitude of 5.2,[3] and an assumed albedo of 0.09, the Johnston's archive estimates a mean-diameter of approximately 404 kilometers (251 mi),[5] while astronomer Michael Brown assumes an albedo of 0.06 and calculates a diameter of 449 kilometers (279 mi) using a fainter magnitude of 5.5. Brown also characterizes the object as a "probable dwarf planet", an intermediate category in his classification scheme (also see list of candidates).[6]
As of 2018, no rotational lightcurve of this object has been obtained from photometric observations. The object's rotation period, pole and shape remain unknown.[3]
Numbering and naming
As of 2018, this minor planet has not been numbered or named.[1]
See also
- List of Solar System objects most distant from the Sun in 2015
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "2002 CY248". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?object_id=2002+CY248. Retrieved 23 February 2018.
- ↑ "List Of Transneptunian Objects". Minor Planet Center. http://www.minorplanetcenter.org/iau/lists/TNOs.html. Retrieved 23 February 2018.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "JPL Small-Body Database Browser: (2002 CY248)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3117451. Retrieved 23 February 2018.
- ↑ 4.0 4.1 Buie, Marc W.. "Orbit Fit and Astrometric record for 02CY248". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/02CY248.html. Retrieved 2018-02-17.
- ↑ 5.0 5.1 5.2 5.3 Johnston, Wm. Robert (30 December 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 23 February 2018.
- ↑ 6.0 6.1 6.2 6.3 6.4 Brown, Michael E.. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 23 February 2018.
External links
- MPEC 2004-E32 : 2002 CZ154, 2002 CY248, 2002 CD251, 2002 XH91, 2003 FK127, 2003 FH129, Minor Planet Electronic Circular, 11 March 2004
- 2002 CY248 at AstDyS-2, Asteroids—Dynamic Site
- 2002 CY248 at the JPL Small-Body Database
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