(612931) 2005 CA79: Difference between revisions
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'''{{mp|612931|2005 CA|79}}''', also written '''2005 CA79''' is a [[resonant trans-Neptunian object]] from the [[Kuiper belt]] in the outermost regions of the [[Solar System]]. It was discovered in 2005 by a team led by [[Michael E. |
'''{{mp|612931|2005 CA|79}}''', also written '''2005 CA79''' is a [[resonant trans-Neptunian object]] from the [[Kuiper belt]] in the outermost regions of the [[Solar System]]. It was discovered in February 1, 2005 by a team led by [[Michael E. Brown]]. It is classified as a [[twotino]], a [[minor planet]] in a [[resonant trans-Neptunian object#1:2|1:2]] mean-motion [[orbital resonance]] with [[Neptune]]. The [[dwarf planet candidate]] measures approximately 340 km in diameter.<ref name=A>{{cite web|language=en | url = http://www.minorplanetcenter.org/iau/lists/TNOs.html | title = List Of Transneptunian Objects | publisher = [[Minor Planet Center]] | date = November 18, 2014}}</ref><ref>{{cite web|language=en | url = http://web.gps.caltech.edu/~mbrown/dps.html | title = How many dwarf planets are there in the outer solar system? (updates daily) | date = April 15, 2015}}</ref> As of 2021, it has not been [[Astronomical naming convention#Minor planets|named]]. |
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== Twotino == |
== Twotino == |
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Revision as of 01:43, 26 December 2024
| Discovery | |
|---|---|
| Discovered by | Mike Brown |
| Discovery site | Palomar Observatory[1] |
| Discovery date | 1 February 2005 |
| Designations | |
| TNO · twotino · distant | |
| Orbital characteristics | |
| Aphelion | 59.197 AU |
| Perihelion | 37.126 AU |
| 48.183 AU | |
| Eccentricity | 0.229 |
| 328.08 yr | |
| Inclination | 11.7 |
| Physical characteristics | |
| 313 km | |
| 156 km | |
Mean density | 0.192 |
(612931) 2005 CA79, also written 2005 CA79 is a resonant trans-Neptunian object from the Kuiper belt in the outermost regions of the Solar System. It was discovered in February 1, 2005 by a team led by Michael E. Brown. It is classified as a twotino, a minor planet in a 1:2 mean-motion orbital resonance with Neptune. The dwarf planet candidate measures approximately 340 km in diameter.[2][3] As of 2021, it has not been named.
Twotino
2005 CA79 has a semi-major axis (average distance from the sun) near the edge of the classical Kuiper belt. Johnston's Archive lists this onject as a twotino that it stays in a 1:2 orbital resonance with the planet Neptune (for every orbit a twotino makes, Neptune orbits twice).
Discovery
2005 CA79 was discovered by a team led by Mike Brown on the Palomar Observatory on February 1, 2005. It was not announced until 2007.
Physical characteristics
Density
(612931) 2005 CA79's density is estimated to be equivalent to that of the plutino 2001 XD255 and Saturn's moon Mimas.[citation needed] A low density indicates a body made primarily of ice.
Diameter and albedo
Based on an albedo of 0.12, 2005 CA79 measures approximately 313 km in diameter. Mike Brown estimates a diameter of 450 km and is "probably" a dwarf planet. As of 2019, no rotational lightcurve has been detected. It's rotation period and axial tilt remain unknown.[citation needed]
Numbering and naming
2005 CA79 was numbered by the Minor Planet Center in 2020. As of 2020, it has not been named.[2]
See also
References
- ^ "(612931) = 2005 CA79". Minor Planet Center. Retrieved 22 November 2024.
- ^ a b "List Of Transneptunian Objects". Minor Planet Center. November 18, 2014.
- ^ "How many dwarf planets are there in the outer solar system? (updates daily)". April 15, 2015.
