2005 HC4

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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[edit]

References[edit]

  1. ^ "MPEC 2005-J02 : 2005 HC4". IAU Minor Planet Center. 2005-05-01. Retrieved 2014-03-05.  (K05H04C)
  2. ^ "JPL Small-Body Database Browser: (2005 HC4)" (2005-05-11 last obs (arc=11 days)). Jet Propulsion Laboratory. Retrieved 30 March 2016. 
  3. ^ "NEODyS 2005 HC4". Near Earth Objects - Dynamic Site. Retrieved 2014-03-07. 

External links[edit]