2009 HD21

Summary

2009 HD21 is an asteroid^[1].

Key Facts

• 2009 HD21's instance of is recorded as asteroid^[2].
• 2009 HD21's instance of is recorded as potentially hazardous asteroid^[3].
• 2009 HD21's instance of is recorded as near-Earth object^[4].
• 2009 HD21's site of astronomical discovery is recorded as Mount Lemmon Observatory^[5].
• 2009 HD21's minor planet group is recorded as Apollo asteroid^[6].
• 2009 HD21's parent astronomical body is recorded as Sun^[7].
• 2009 HD21's provisional designation is recorded as 2009 HD21^[8].
• 2009 HD21's time of discovery or invention is recorded as +2009-03-24T00:00:00Z^[9].
• 2009 HD21's JPL Small-Body Database SPK-ID is recorded as 20744281^[10].
• 2009 HD21's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.6885590178666336'}^[11].
• 2009 HD21's absolute magnitude is recorded as {'unit': '1', 'amount': '+18.24'}^[12].
• 2009 HD21's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+18.66117836828392'}^[13].
• 2009 HD21's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+1682.043849469027'}^[14].
• 2009 HD21's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+179.1100429769741'}^[15].
• 2009 HD21's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.767956480657225'}^[16].
• 2009 HD21's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+4.673857876476148'}^[17].
• 2009 HD21's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+0.8620550848383025'}^[18].
• 2009 HD21's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+134.3079590059691'}^[19].
• 2009 HD21's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+146.2369225839608'}^[20].
• 2009 HD21's Google Knowledge Graph ID is recorded as /g/12z65qcgl^[21].
• 2009 HD21's Minor Planet Center body ID is recorded as 2009 HD21^[22].
• 2009 HD21's epoch is recorded as May 5, 2025^[23].
• 2009 HD21's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2460117.23078834'}^[24].

Body

Designation and Status

Recorded instance of include asteroid^[2], potentially hazardous asteroid^[3], and near-Earth object^[4].