Astronomy:(251732) 1998 HG49

From HandWiki
(251732) 1998 HG49
Discovery[1][2][3]
Discovered bySpacewatch
Discovery siteKitt Peak National Obs.
Discovery date27 April 1998
Designations
(251732) 1998 HG49
1998 HG49
Minor planet category
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc16.91 yr (6,175 days)
|{{{apsis}}}|helion}}1.3357 AU
|{{{apsis}}}|helion}}1.0654 AU
1.2006 AU
Eccentricity0.1126
Orbital period1.32 yr (480 days)
Mean anomaly100.57°
Mean motion0° 44m 57.48s / day
Inclination4.1954°
Longitude of ascending node44.829°
324.29°
Earth MOID0.0767 AU (29.9 LD)
Physical characteristics
Mean diameter0.13–0.29 km (estimate)[3]
Absolute magnitude (H)


(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 Tucson, Arizona, United States.[2]

Description

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]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 28 November 2010.[6] As of 2018, it has not been named.[2]

See also

References

  1. 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 251732 (1998 HG49)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2251732;cad=1. Retrieved 17 January 2018. 
  2. 2.0 2.1 2.2 2.3 2.4 "251732 (1998 HG49)". https://www.minorplanetcenter.net/db_search/show_object?object_id=251732. Retrieved 17 January 2018. 
  3. 3.0 3.1 3.2 NeoDys-2 Retrieved 2011-09-05
  4. Evans, N. Wyn; Tabachnik, Serge (May 1999). "Possible long-lived asteroid belts in the inner Solar System". Nature 399 (6731): 41. doi:10.1038/19919. Bibcode1999Natur.399...41E. 
  5. JPL close-approach data Retrieved 2011-09-05
  6. "MPC/MPO/MPS Archive". https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 25 February 2018. 

External links