(612931) 2005 CA79
| 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
Colour and rotation period
As of 2021, no spectrogram nor a rotational lightcurve has been obtained from photometry. The body's color, rotation period, axial tilt, pole, and shape remain unknown.
Diameter and albedo
According to Michael E. Brown and Johnston's Archive, 2005 CA79 measures approximately 449 km and 339 km in diameter with geometric albedos of 0.030 and 0.040 respectively. On his website Mike Brown estimates a diameter of 449 km and lists it as a "probable" dwarf planet which is the category with the second lowest certainity on his 5-class taxonomic system (see here).
Numbering and naming
2005 CA79 was numbered by the Minor Planet Center in early-2022, receiving the number (612931) in the minor planet catalog. 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.
