(19255) 1994 VK8 is a trans-Neptunian object (TNO) of the “cold” cubewano class orbiting the Sun in the Kuiper belt of the outer Solar System. It was discovered on November 8, 1994, by Alan Fitzsimmons, Donal O’Ceallaigh, and Iwan P. Williams at Roque de los Muchachos Observatory on the island of La Palma, Spain.
| Discovery[1] | |
|---|---|
| Discovered by | A. Fitzsimmons D. O’Ceallaigh I. P. Williams |
| Discovery site | Roque de los Muchachos Obs. |
| Discovery date | 8 November 1994 |
| Designations | |
| (19255) 1994 VK8 | |
| none | |
| cubewano[2][3] (cold)[4] | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 7347 days (20.11 yr) |
| Aphelion | 44.40611 AU (6.643060 Tm) |
| Perihelion | 41.34116 AU (6.184550 Tm) |
| 42.87364 AU (6.413805 Tm) | |
| Eccentricity | 0.035744 |
| 280.73 yr (102538 d) | |
Average orbital speed | 4.56 km/s |
| 267.925° | |
| 0° 0m 12.639s / day | |
| Inclination | 1.48856° |
| 72.3924° | |
| 112.111° | |
| TJupiter | 5.857 |
| Physical characteristics | |
| Dimensions | 175 km[3] |
| Mass | 5.6×1018 kg |
Mean density | 2.0 g/cm3 |
Equatorial surface gravity | 0.0489 m/s2 |
Equatorial escape velocity | 0.0925 km/s |
| 9 h (0.38 d)[1] | |
| 0.09 (assumed) | |
| Temperature | ~43 K |
| ? | |
| 7.0[1] | |
(19255) 1994 VK8 is the fourth cubewano to be given an official Minor Planet Center catalog number.[5] The first three official cubewanos are 15760 Albion, (15807) 1994 GV9, and (16684) 1994 JQ1.
- ^ a b c d “JPL Small-Body Database Browser: 19255 (1994 VK8)” (2000-11-27 last obs). Retrieved 8 April 2016.
- ^ Marc W. Buie (1997-10-27). “Orbit Fit and Astrometric record for 19255”. SwRI (Space Science Department). Retrieved 2008-09-29.
- ^ a b Wm. Robert Johnston (22 August 2008). “List of Known Trans-Neptunian Objects”. Johnston’s Archive. Archived from the original on 28 September 2008. Retrieved 2008-09-29.
- ^ Brown, Mike. “How many dwarf planets are there in the Solar System”. Retrieved 2018-02-17.
- ^ “MPEC 2008-O05 : Distant Minor Planets (2008 AUG. 2.0 TT)”. Minor Planet Center. 2008-07-17. Archived from the original on 7 December 2008. Retrieved 2008-09-29.
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