(22311) 1991 EF2
minor planet
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Summary
(22311) 1991 EF2 is an asteroid[1].
Key Facts
- Discoverer or inventor: Henri Debehogne[2]
- Site of astronomical discovery: La Silla Observatory[3]
- Follows: (22310) 1990 WU1[4]
- Followed by: 22312 Kelly[5]
- Minor planet group: asteroid belt[6]
- Parent astronomical body: Sun[7]
- Provisional designation: 1991 EF2[8], 1998 KN47[9]
- Time of discovery or invention: March 10, 1991[10]
- Orbital eccentricity: 0.06[11], 0.0562715[12], 0.05715844472209843[13]
- Absolute magnitude: 14.2[14], 14.39[15]
- Orbital inclination: 5.42615 degree[16], 5.430238581269821 degree[17]
- Orbital period: 3.26 years[18], 1188.875256163123 day[19]
- Longitude of ascending node: 175.75276 degree[20], 175.7140070367533 degree[21]
- Semi-major axis of an orbit: 2.1967910 astronomical unit[22], 2.196301244158011 astronomical unit[23]
- Apoapsis: 2.320 astronomical unit[24], 2.321838407415293 astronomical unit[25]
- Periapsis: 2.0731743 astronomical unit[26], 2.07076408090073 astronomical unit[27]
- Argument of periapsis: 18.10554 degree[28], 18.81565717739262 degree[29]
- Mean anomaly: 203.85499 degree[30], 209.6439986170909 degree[31]
- Diameter: 3.583 km[32]
- Albedo: 0.315[33]
- Epoch: November 21, 2025[34]
- Time of periapsis: 2461497.040360166 Julian day[35]