(251732) 1998 HG49

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(251732) 1998 HG49
Discovery [1][2][3]
Discovered by Spacewatch
Discovery site Kitt Peak National Obs.
Discovery date 27 April 1998
Designations
MPC designation (251732) 1998 HG49
1998 HG49
Amor · NEO[1][2]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 16.91 yr (6,175 days)
Aphelion 1.3357 AU
Perihelion 1.0654 AU
1.2006 AU
Eccentricity 0.1126
1.32 yr (480 days)
100.57°
0° 44m 57.48s / day
Inclination 4.1954°
44.829°
324.29°
Earth MOID 0.0767 AU · 29.9 LD
Physical characteristics
Mean diameter
0.13–0.29 km (estimate)[3]
21.7[1] · 21.8[3]

(251732) 1998 HG49, provisional designation 1998 HG49, is a sub-kilometer asteroid and near-Earth object of the Amor group, approximately 200 meters in diameter. It was discovered on 27 April 1998, by astronomers of the Spacewatch program at the Kitt Peak National Observatory near of Tucson, Arizona, United States.[2]

Description[edit]

1998 HG49 is an Amor asteroid because its perihelion is less than 1.3 AU and does not cross Earth's orbit. It is on a low-eccentricity and low-inclination orbit between the orbits of Earth and Mars. This is within a region of stability where bodies may survive for the age of the Solar System, and hence it may have formed near its current orbit.[4]

The asteroid orbits the Sun at a distance of 1.1–1.3 AU once every 1 year and 4 months (480 days; semi-major axis of 1.20 AU). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Kitt Peak in April 1998.[2]

Between 1900 and 2200 its closest approach to Earth is more than 0.14 AU.[5]

See also[edit]

References[edit]

  1. ^ a b c d e "JPL Small-Body Database Browser: 251732 (1998 HG49)" (2015-03-24 last obs.). Jet Propulsion Laboratory. Retrieved 17 January 2018. 
  2. ^ a b c d "251732 (1998 HG49)". Minor Planet Center. Retrieved 17 January 2018. 
  3. ^ a b c NeoDys-2 Retrieved 2011-09-05
  4. ^ Wyn Evans, N.; Tabachnik, Serge (May 1999). "Possible long-lived asteroid belts in the inner Solar System". Nature. 399 (6731): 41. Bibcode:1999Natur.399...41W. doi:10.1038/19919. Retrieved 16 January 2018. 
  5. ^ JPL close-approach data Retrieved 2011-09-05

External links[edit]