21436 Chaoyichi provisional designation 1998 FL116, is a background asteroid and binary system[2] from the inner region of the asteroid belt, approximately 2 kilometers in diameter. It was discovered on 31 March 1998, by astronomers of the Lincoln Near-Earth Asteroid Research at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, United States.[1]
Discovery | |
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Discovered by | LINEAR |
Discovery site | Lincoln Lab ETS |
Discovery date | 31 March 1998 |
Designations | |
MPC designation | (21436) Chaoyichi |
Alternative designations | 1998 FL116 |
Minor planet category | main-belt · background |
Orbital characteristics[1] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 0 | |
Observation arc | 9565 days (26.19 yr) |
Aphelion | 2.3725454 AU (354.92774 Gm) |
Perihelion | 2.0008870 AU (299.32843 Gm) |
Semi-major axis | 2.186716 AU (327.1281 Gm) |
Eccentricity | 0.0849810 |
Orbital period (sidereal) | 3.23 yr (1181.1 d) |
Mean anomaly | 226.1171° |
Mean motion | 0° 18m 17.281s / day |
Inclination | 3.736916° |
Longitude of ascending node | 320.37494° |
Argument of perihelion | 178.30874° |
Known satellites | 1[2] |
Physical characteristics | |
Mean diameter | 1.953±0.256 km[1] |
Synodic rotation period | 2.87 h[1][3] |
Geometric albedo | 0.222±0.062[1] |
Absolute magnitude (H) | 15.4[1] |
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