2005 HC4
| Discovery[1] | |
|---|---|
| Discovered by | LONEOS |
| Discovery date | 2005-04-30 |
| Designations | |
| Mercury Crosser, Venus Crosser, Apollo Asteroid, Mars Crosser | |
| Orbital characteristics[2] | |
| Epoch 3 May 2005 (JD 2453493.5) | |
| Uncertainty parameter 9 | |
| Aphelion | 3.5707 AU (534.17 Gm) |
| Perihelion | 0.070657 AU (10.5701 Gm) |
| 1.8207 AU (272.37 Gm) | |
| Eccentricity | 0.96119 |
| 2.46 yr (897.30 d) | |
| 341.42° | |
| 0° 24m 4.32s /day | |
| Inclination | 8.3967° |
| 63.790° | |
| 309.01° | |
| Earth MOID | 0.0615074 AU (9.20138 Gm) |
| Jupiter MOID | 1.92798 AU (288.422 Gm) |
| Physical characteristics | |
| Dimensions | 210-480 m [3] |
| 20.7 | |
2005 HC4 is the asteroid with the smallest known perihelion of any known object orbiting the Sun. Its extreme orbital eccentricity brings it within 0.071 AU of the Sun (23% of Mercury's perihelion) and as far as 3.562 AU from the Sun (well beyond the orbit of Mars).
See also
- List of Mercury-crossing minor planets
- List of Venus-crossing minor planets
- Apollo asteroids
- List of Mars-crossing minor planets
References
- ^ "MPEC 2005-J02 : 2005 HC4". IAU Minor Planet Center. 2005-05-01. Retrieved 2014-03-05. (K05H04C)
- ^ "JPL Small-Body Database Browser: (2005 HC4)" (2005-05-11 last obs (arc=11 days)). Jet Propulsion Laboratory. Retrieved 30 March 2016.
- ^ "NEODyS 2005 HC4". Near Earth Objects - Dynamic Site. Retrieved 2014-03-07.
External links
- 2005 HC4 at the JPL Small-Body Database
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