Astronomy:2011 GA

From HandWiki
2011 GA
Discovery[1]
Discovered byMount Lemmon Survey
Discovery siteCatalina Mountains north of Tucson, Arizona, USA
Discovery dateApril 1, 2011
Designations
2011 GA
MPO 200327
Minor planet categoryApollo Apollo
NEO, PHA
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 5
Observation arc70 d
|{{{apsis}}}|helion}}2.8692 astronomical unit|AU (429.23 Gm)
|{{{apsis}}}|helion}}0.73727 AU (110.294 Gm)
1.80321 AU (269.756 Gm)
Eccentricity0.59114
Orbital period2.42 yr (884.44 d)
Mean anomaly305.631°
Mean motion0° 24m 25.33s /day
Inclination9.8282°
Longitude of ascending node200.4246°
109.750°
Earth MOID0.00686464 AU (1,026,936 km)
Jupiter MOID2.51622 AU (376.421 Gm)
Physical characteristics
Dimensions170–380 m[3]
Absolute magnitude (H)21.0[2]


2011 GA is a small asteroid that is a Near-Earth object and an Apollo asteroid.

Orbit

The orbit of 2011 GA makes it a potentially hazardous asteroid (PHA) that is predicted to pass within 0.02 astronomical unit|AU (3,000,000 km; 1,900,000 mi) of the Earth on Oct 14, 2023.[4] For comparison, the distance to the Moon is about 0.0026 AU (384,400 km). The asteroid passed within 0.06 astronomical unit|AU (9,000,000 km; 5,600,000 mi) from Earth around October 15, 1977.

The Jupiter Tisserand invariant, used to distinguish different kinds of orbits, is 3.821.[2]

See also

References

  1. ↑ "2011 GA". Minor Planet Center. 2011-06-10. http://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=2011+GA. 
  2. ↑ 2.0 2.1 2.2 "JPL Small-Body Database Browser: (2011 GA)". Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011%20GA. Retrieved 31 March 2016. 
  3. ↑ "ABSOLUTE MAGNITUDE (H)". NASA. http://neo.jpl.nasa.gov/glossary/h.html. 
  4. ↑ "JPL Small-Body Database Browser: (2011 GA) – Close-Approach Data". Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011GA;cad=1#cad. Retrieved 2015-05-05. 




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