644 Cosima is a minor planet orbiting the Sun.
![]() Modelled shape of Cosima from its lightcurve | |
Discovery | |
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Discovered by | August Kopff |
Discovery site | Heidelberg |
Discovery date | 7 September 1907 |
Designations | |
MPC designation | (644) Cosima |
Alternative designations | 1907 AA |
Orbital characteristics[1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 107.84 yr (39390 d) |
Aphelion | 3.0041 AU (449.41 Gm) |
Perihelion | 2.1938 AU (328.19 Gm) |
Semi-major axis | 2.5990 AU (388.80 Gm) |
Eccentricity | 0.15589 |
Orbital period (sidereal) | 4.19 yr (1530.4 d) |
Mean anomaly | 357.546° |
Mean motion | 0° 14m 6.864s / day |
Inclination | 1.0409° |
Longitude of ascending node | 109.975° |
Argument of perihelion | 268.690° |
Physical characteristics | |
Mean radius | 9.96±0.75 km |
Synodic rotation period | 7.556 h (0.3148 d) |
Geometric albedo | 0.1572±0.028 |
Absolute magnitude (H) | 11.13 |
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Minor planets |
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