440 Theodora

440 Theodora
Discovery
A three-dimensional model of 440 Theodora based on its light curve.
Discovered by	E. F. Coddington
Discovery date	13 October 1898
Designations
Alternative names	1898 EC
Minor planet category	Main belt
Orbital characteristics^[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	117.50 yr (42917 d)
Aphelion	2.44735 AU (366.118 Gm)
Perihelion	1.97352 AU (295.234 Gm)
Semi-major axis	2.21043 AU (330.676 Gm)
Eccentricity	0.10718
Orbital period	3.29 yr (1200.4 d)
Average orbital speed	20.03 km/s
Mean anomaly	224.670°
Mean motion	0° 17^m 59.669^s / day
Inclination	1.59566°
Longitude of ascending node	292.133°
Argument of perihelion	179.039°
Earth MOID	0.988623 AU (147.8959 Gm)
Jupiter MOID	2.63791 AU (394.626 Gm)
Jupiter Tisserand parameter	3.650
Physical characteristics
Dimensions	11 - 24 km
Mass	unknown
Mean density	unknown
Equatorial surface gravity	unknown
Equatorial escape velocity	unknown
Rotation period	4.828 h (0.2012 d)
Geometric albedo	unknown
Temperature	unknown
Spectral type	unknown
Absolute magnitude (H)	11.5

440 Theodora is a small Main belt asteroid.

It was discovered by E. F. Coddington on October 13, 1898 at Mount Hamilton. It was his second asteroid discovery.

References

Minor planets navigator

439 Ohio 440 Theodora 441 Bathilde

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