Discovery [1] | |
---|---|
Discovered by | NEAT ( 644) |
Discovery date | 14 November 2003 [2] |
Designations | |
(84922) 2003 VS2 | |
none | |
Plutino [3] [4] | |
Orbital characteristics [2] [3] | |
Epoch 13 January 2016 ( JD 2457400.5) | |
Uncertainty parameter 3 | |
Observation arc | 8830 days (24.18 yr) |
Earliest precovery date | 17 September 1991 |
Aphelion | 42.413 AU (6.3449 Tm) |
Perihelion | 36.456 AU (5.4537 Tm) |
39.435 AU (5.8994 Tm) | |
Eccentricity | 0.075539 |
247.64 yr (90451.3 d) | |
Average
orbital speed | 4.75 km/ s |
15.535 ° | |
0° 0m 14.328s / day | |
Inclination | 14.777° |
302.792° | |
114.317° | |
Physical characteristics | |
Dimensions | (678±10) × (470±12) × (452±16) km [5] |
Mean diameter | |
Mean
density | 1.4+1.0 −0.3 g/cm3 [6] |
7.4175285±0.00001 h [8] | |
7.41±0.02 h [9] | |
0.134±0.01 [5] | |
Temperature | ≈44 K |
| |
19.7 [10] | |
4.11±0.38 [8] |
(84922) 2003 VS2 is a trans-Neptunian object discovered by the Near Earth Asteroid Tracking program on 14 November 2003. [1] Like Pluto, it is in a 2:3 orbital resonance with Neptune [3] [4] and is thus a plutino. Analysis of light-curve suggests that it is not a dwarf planet. [11]
Like Pluto, (84922) 2003 VS2 is locked in the 3:2 mean-motion resonance with Neptune, although its orbit is both less inclined and significantly less eccentric than Pluto's. [2]
(84922) 2003 VS2 has a significant light-curve amplitude of 0.21±0.01. The most likely value of the rotation period is 7.41±0.02 h. [9]
(84922) 2003 VS2 has a moderately red surface with a moderately red color indices B−V=0.93, V−R=0.59. [12] Its geometrical albedo is about 0.13. [6]
In 2007, its diameter was initially estimated by the
Spitzer Space Telescope at 725±200 km.
[13] However, in 2012, this was reduced to 523.0+35.1
−34.4 km after new
Herschel Space Telescope observations.
[7] In 2019, 2003 VS2 was found to be
ellipsoidal in shape based on
stellar occultations that occurred in 2013 and 2014;
[6] the light curve derived from the occultations suggests that this plutino is not in hydrostatic equilibrium and hence not a dwarf planet.
[14] The dimensions of 2003 VS2 are estimated at 627.6 km × 531 km × 494.6 km, with a volume-equivalent diameter 548.3+29.5
−44.6 km.
[6] 2003 VS2 has no known satellite that can be used to directly determine its mass, but assuming a density of 1 g/cm3, typical of mid size TNO's,
[15] gives a mass estimate of about 7.5×1019 kg.
Discovery [1] | |
---|---|
Discovered by | NEAT ( 644) |
Discovery date | 14 November 2003 [2] |
Designations | |
(84922) 2003 VS2 | |
none | |
Plutino [3] [4] | |
Orbital characteristics [2] [3] | |
Epoch 13 January 2016 ( JD 2457400.5) | |
Uncertainty parameter 3 | |
Observation arc | 8830 days (24.18 yr) |
Earliest precovery date | 17 September 1991 |
Aphelion | 42.413 AU (6.3449 Tm) |
Perihelion | 36.456 AU (5.4537 Tm) |
39.435 AU (5.8994 Tm) | |
Eccentricity | 0.075539 |
247.64 yr (90451.3 d) | |
Average
orbital speed | 4.75 km/ s |
15.535 ° | |
0° 0m 14.328s / day | |
Inclination | 14.777° |
302.792° | |
114.317° | |
Physical characteristics | |
Dimensions | (678±10) × (470±12) × (452±16) km [5] |
Mean diameter | |
Mean
density | 1.4+1.0 −0.3 g/cm3 [6] |
7.4175285±0.00001 h [8] | |
7.41±0.02 h [9] | |
0.134±0.01 [5] | |
Temperature | ≈44 K |
| |
19.7 [10] | |
4.11±0.38 [8] |
(84922) 2003 VS2 is a trans-Neptunian object discovered by the Near Earth Asteroid Tracking program on 14 November 2003. [1] Like Pluto, it is in a 2:3 orbital resonance with Neptune [3] [4] and is thus a plutino. Analysis of light-curve suggests that it is not a dwarf planet. [11]
Like Pluto, (84922) 2003 VS2 is locked in the 3:2 mean-motion resonance with Neptune, although its orbit is both less inclined and significantly less eccentric than Pluto's. [2]
(84922) 2003 VS2 has a significant light-curve amplitude of 0.21±0.01. The most likely value of the rotation period is 7.41±0.02 h. [9]
(84922) 2003 VS2 has a moderately red surface with a moderately red color indices B−V=0.93, V−R=0.59. [12] Its geometrical albedo is about 0.13. [6]
In 2007, its diameter was initially estimated by the
Spitzer Space Telescope at 725±200 km.
[13] However, in 2012, this was reduced to 523.0+35.1
−34.4 km after new
Herschel Space Telescope observations.
[7] In 2019, 2003 VS2 was found to be
ellipsoidal in shape based on
stellar occultations that occurred in 2013 and 2014;
[6] the light curve derived from the occultations suggests that this plutino is not in hydrostatic equilibrium and hence not a dwarf planet.
[14] The dimensions of 2003 VS2 are estimated at 627.6 km × 531 km × 494.6 km, with a volume-equivalent diameter 548.3+29.5
−44.6 km.
[6] 2003 VS2 has no known satellite that can be used to directly determine its mass, but assuming a density of 1 g/cm3, typical of mid size TNO's,
[15] gives a mass estimate of about 7.5×1019 kg.