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Revision as of 16:27, 27 July 2020
| Discovery | |
|---|---|
| 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 |
| Orbital characteristics | |
| 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° 49 32.16 / 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) 160 m (est. at 0.057) |
| Absolute magnitude (H) | 22.7 |
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.
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.
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.
The body's observation arc begins with its first observation by LINEAR in 2003.
Numbering and naming
As of 2020, this minor planet has neither been numbered nor named.
Physical characteristics
The object's spectral type remains unknown.
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.
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. 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
- (612600) 2003 SM84 at the JPL Small-Body Database
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