1493 Sigrid

Sigrid
Discovery
Discovered by	E. Delporte
Discovery site	Uccle
Discovery date	26 August 1938
Designations
MPC designation	1493
Alternative names	1938 QB
Orbital characteristics^[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	107.39 yr (39224 days)
Aphelion	2.9199701 AU (436.82131 Gm)
Perihelion	1.9425057 AU (290.59472 Gm)
Semi-major axis	2.431238 AU (363.7080 Gm)
Eccentricity	0.2010220
Orbital period	3.79 yr (1384.6 d)
Mean anomaly	214.34838°
Mean motion	0° 15^m 35.977^s / day
Inclination	2.579875°
Longitude of ascending node	330.65263°
Argument of perihelion	1.364771°
Earth MOID	0.931276 AU (139.3169 Gm)
Jupiter MOID	2.43163 AU (363.767 Gm)
Jupiter Tisserand parameter	3.478
Physical characteristics
Mean radius	7001120150000000000♠12.015±1.05 km
Rotation period	43.296 h (1.8040 d)
Geometric albedo	6998489000000000000♠0.0489±0.010
Absolute magnitude (H)	11.99

1493 Sigrid (1938 QB) is a main-belt asteroid discovered on August 26, 1938, by E. Delporte at Uccle. It was named after the wife of the Danish-American astronomer Bengt Georg Daniel Strömgren.

References

↑ "1493 Sigrid (1938 QB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 27 April 2016.

External links

Discovery · Orbit diagram · Orbital elements · Physical parameters

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