(391211) 2006 HZ51

(391211) 2006 HZ51
Discovery[1]
Discovered by Catalina Sky Survey
Discovery date 27 April 2006
Designations
none
Amor
Orbital characteristics[2][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 4775 days (13.07 yr)
Aphelion 2.75104 AU (411.550 Gm)
Perihelion 1.04323 AU (156.065 Gm)
1.89714 AU (283.808 Gm)
Eccentricity 0.45010
2.61 yr (954.43 d)
20.48 km/s
220.298°
0° 22m 37.873s / day
Inclination 12.4138°
84.3150°
193.332°
Earth MOID 0.0331954 AU (4.96596 Gm)
Jupiter MOID 2.3967 AU (358.54 Gm)
Jupiter Tisserand parameter 3.796
Physical characteristics
Dimensions ~800 meters[4]
Mass ~5.4×1011 kg
Mean density
 2.0? g/cm³
Equatorial surface gravity
 ~0.0002 m/s²
Equatorial escape velocity
 ~0.0004 km/s
0.10?
Temperature ~202 K
18.5[3]

    (391211) 2006 HZ51 is an 800 meter in diameter asteroid discovered on 27 April 2006 by the Catalina Sky Survey that with a 1.1 day observation arc was thought to have a 1 in 6 million chance of hitting Earth on 21 June 2008.[4] Further refinement of the orbit quickly eliminated the risk. The preliminary orbit solution was at first thought to have a period of 7 years and a perihelion of ~1.1 AU. [MPEC 2006-H58, 28 April 2006, 2-day orbit].

    References

    1. ↑ "Discovery Circumstances: Numbered Minor Planets". Minor Planet Center.
    2. ↑ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
    3. 1 2 "JPL Small-Body Database Browser: 391211 (2006 HZ51)". Jet Propulsion Laboratory. Retrieved 9 April 2016.
    4. 1 2 Big new asteroid has slim chance of hitting Earth - New Scientist


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