astro.wikisort.org - Asteroid
(612600) 2003 SM84 is a sub-kilometer asteroid, classified as near-Earth object of the Amor group orbiting between Earth and Mars. It was first observed by the Lincoln Near-Earth Asteroid Research (LINEAR) at the Lincoln Laboratory ETS on 20 September 2003.[1]
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Laboratory ETS |
| Discovery date | 20 September 2003 (first observed only) |
| Designations | |
MPC designation | 2003 SM84 |
Minor planet category | NEO · Amor[1][2] |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 12.21 yr (4,459 d) |
| Aphelion | 1.2176 AU |
| Perihelion | 1.0331 AU |
Semi-major axis | 1.1254 AU |
| Eccentricity | 0.0819 |
Orbital period (sidereal) | 1.19 yr (436 d) |
Mean anomaly | 97.681° |
Mean motion | 0° 49m 32.16s / day |
| Inclination | 2.7956° |
Longitude of ascending node | 186.68° |
Argument of perihelion | 87.374° |
| Earth MOID | 0.0516 AU (20.1022 LD) |
| Physical characteristics | |
Mean diameter | 86 m (est. at 0.20)[3] 160 m (est. at 0.057)[3] |
Absolute magnitude (H) | 22.7[2] |
2003 SM84 was being considered by the European Space Agency as a candidate target for the Don Quijote mission to study the effects of impacting a spacecraft into an asteroid.[4]
Orbit and classification
2003 SM84 is an Amor asteroid – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it. It orbits the Sun at a distance of 1.0–1.2 AU once every 14 months (436 days; semi-major axis of 1.13 AU). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic.[2]
The body's observation arc begins with its first observation by LINEAR in 2003.[1]
Numbering and naming
As of 2020, this minor planet has neither been numbered nor named.[1]
Physical characteristics
The object's spectral type remains unknown.[2]
Diameter and albedo
Using a magnitude-to-diameter conversion, 2003 SM84 measures 86 and 160 meters in diameter, based on an absolute magnitude of 22.7 and an assumed albedo of 0.20 (S-type) and 0.057 (C-type), respectively.[3]
References
- "2003 SM84". Minor Planet Center. Retrieved 20 December 2019.
- "JPL Small-Body Database Browser: (2003 SM84)" (2015-12-05 last obs.). Jet Propulsion Laboratory. Archived from the original on 2 September 2020. Retrieved 20 December 2019.
- "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 20 December 2019.
- Nerlich, Steve (13 August 2011). "Astronomy Without A Telescope – Impact Mitigation". www.universetoday. Retrieved 20 December 2019.
External links
- ESA Don Quijote mission
- (612600) 2003 SM84 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (612600) 2003 SM84 at the JPL Small-Body Database
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