1272 Gefion

Gefion

Discovery[1]
Discovered by	Reinmuth, K.
Discovery site	Heidelberg
Discovery date	10 October 1931
Designations
MPC designation	1272
Named after	Gefjon
Alternative names	1931 TZ1, A917 SF[1]
Minor planet category	main belt, gefion family
Adjectives	Gefionian
Orbital characteristics[1][2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	84.48 yr (30856 days)
Aphelion	3.2076212 AU (479.85330 Gm)
Perihelion	2.3579254 AU (352.74062 Gm)
Semi-major axis	2.7827733 AU (416.29696 Gm)
Eccentricity	0.1526707
Orbital period	4.64 yr (1695.6 d)
Mean anomaly	130.34895°
Mean motion	0° 12^m 44.346^s / day
Inclination	8.421912°
Longitude of ascending node	321.56560°
Argument of perihelion	3.745104°
Earth MOID	1.34537 AU (201.264 Gm)
Jupiter MOID	2.11244 AU (316.017 Gm)
Jupiter Tisserand parameter	3.300
Physical characteristics
Rotation period	3.0866 h (0.12861 d)
Spectral type	SI (SMASSII)[1]
Absolute magnitude (H)	12.9[1]

1272 Gefion (1931 TZ₁) is an asteroid from the asteroid belt discovered on 10 October 1931 by Reinmuth, K. at Heidelberg.

The Gefion family is named after Gefion, because it has the lowest number of any one of its members.

References

1. "1272 Gefion (1931 TZ1)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 28 April 2016.
2. AstDys-2 on 1272 Gefion Retrieved 2011-09-22

External links

• 1272 Gefion at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters