420356 Praamzius
| Discovery | |
|---|---|
| Discovered by | Kazimieras Černis and R. P. Boyle |
| Discovery site | Mount Graham Observatory |
| Discovery date | 23 January 2012 |
| Designations | |
| MPC designation | (420356) 2012 BX85 |
| Trans-Neptunian object (near-3:5 resonance) | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 1491 days (4.08 yr) |
| Aphelion | 43.029 AU (6.4370 Tm) |
| Perihelion | 42.843 AU (6.4092 Tm) |
| 42.936 AU (6.4231 Tm) | |
| Eccentricity | 0.0021656 |
| 281.35 yr (102762 d) | |
| 168.32° | |
| 0.0035032°/day | |
| Inclination | 1.0917° |
| 314.25° | |
| 10.853° | |
| Earth MOID | 41.8287 AU (6.25748 Tm) |
| Jupiter MOID | 37.5315 AU (5.61463 Tm) |
| Physical characteristics | |
| Dimensions |
200 km (assumed albedo of 0.2) |
| 21.89–22.13 | |
| 5.6[1] | |
|
| |
420356 Praamzius is a trans-Neptunian object (TNO) and possibly a dwarf planet[2] in the Kuiper belt. It has the second-lowest eccentricity of any TNO, after 2003 YN179. Praamzius orbits near the 3:5 resonance with Neptune, but it takes about 160 Neptune orbits (26,500 years) to make an orbit less than would be expected of an object in a true 3:5 resonance. It was discovered on 23 January 2012, with precovery observations accepted by the Minor Planet Center dating back to December 2011, with possible precovery observations dating back to 2004 that have yet to be accepted. It was officially named on 22 February 2016 after the Lithuanian god of the sky, peace, and friendship.
Praamzius is one of the most recently discovered minor planets that have been given a numeric designation, most likely because of the large number of observations, on average about one every 10 days, since it was discovered. All of the observations, except 6 in February 2013, were made by the Mount Graham Observatory, the discovery site.
References
- 1 2 "2012 BX85 - JPL Small Body Database". JPL (2015-01-17 last obs). NASA. Retrieved 25 March 2016.
- ↑ Brown, Mike. "How many dwarf planets are there in the Solar System". Retrieved 2 February 2015.
External links
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