(17246) 2000 GL74
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Orbit of (17246) 2000 GL74
|
|
| Discovery [1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | MRO |
| Discovery date | 5 April 2000 |
| Designations | |
| 2000 GL74 · 1973 VM | |
| main-belt · Koronis [2] | |
| Orbital characteristics [1][4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 16138 days (44.18 yr) |
| Aphelion | 2.9016 AU (434.07 Gm) |
| Perihelion | 2.7788 AU (415.70 Gm) |
| 2.8402 AU (424.89 Gm) | |
| Eccentricity | 0.021625 |
| 4.79 yr (1748.3 d) | |
| 57.137° | |
| Inclination | 2.4445° |
| 34.453° | |
| 229.70° | |
| Known satellites | 1[lower-alpha 1][3] |
| Earth MOID | 1.76245 AU (263.659 Gm) |
| Jupiter MOID | 2.08952 AU (312.588 Gm) |
| Physical characteristics | |
| Dimensions | 4.5 km[4] 5.04 km (calculated)[2] |
| 10 h (0.42 d)[5] | |
| 0.21[3] | |
| S [2][4] | |
| 13.8[1][4] | |
(17246) 2000 GL74 is a binary[lower-alpha 1] asteroid from the main-belt and member of the Koronis family, about 5 kilometers in diameter.[2] It was discovered on 5 April 2000, by the Lincoln Near-Earth Asteroid Research (LINEAR) program at the U.S. Magdalena Ridge Observatory near Socorro, New Mexico.[6] It is known to possess an asteroid moon, designated S/2004 (17246) 1. The S-type asteroid orbits the Sun at a distance of 2.8–2.9 AU once every 4 years and 9 months (1,748 days) and shows an eccentricity of 0.02 and an inclination of 2 degrees from the plane of the ecliptic.[1]
Characteristics
(17246) 2000 GL74 is more reflective than most asteroids, with an albedo of 0.21. Even so, it is not very large, having a size of only 4.5 kilometres.[4] Its rotation period of 10 hours is not unusual, however.[5]
Close approaches
On January 9, 2129, the asteroid will come within 3,639,998 kilometers of 3 Juno, one of the largest asteroids in the main-belt, and will pass it with a relative velocity of 6.597 km/s.[1]
Moon
(17246) 2000 GL74 has one moon, S/2004 (17246) 1. It is 44% the size of (17246) 2000 GL74, at 2 km.[4] While its rotation period and orbital eccentricity is not yet known, it is known that the moon completes one orbit every 90 days at a distance of about 250 km. From the surface of (17246) 2000 GL74, S/2004 (17246) 1 would have an apparent diameter of about 0.668°, slightly larger than the Moon appears from Earth.[lower-alpha 2]
Notes
- ↑ 1.0 1.1 IAUC 8293, S/2004 (17246) 1: reports the discovery on Jan. 14.9 UT, on six direct images (two sets of three images taken 20 min apart in time) made with the Hubble Space Telescope (+ ACS/HRC), of a satellite of minor planet (17246) 2000 GL_74 (V about 18.5). The satellite is clearly separated from the primary in five images. On Jan. 14.9195, the satellite was at separation 0".16 (projected separation 230 km) in p.a. 280 deg. Using the average albedo of the Koronis family (about 0.21), to which (17246) belongs, the size of the primary is estimated to be 4.5 km. The brightness difference is about 2 mag, giving an estimated diameter of the secondary of about 2 km.
Reported by: P. M. Tamblyn, Southwest Research Institute (SwRI) and Binary Astronomy; W. J. Merline, C. R. Chapman, D. Nesvorny, and D. D. Durda, SwRI; C. Dumas, Jet Propulsion Laboratory; A. D. Storrs, Towson University; L. M. Close, University of Arizona; and F. Menard, Observatoire de Grenoble - ↑ Calculated by solving
.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (15001)-(20000) – Minor Planet Center
- (17246) 2000 GL74 at the JPL Small-Body Database
