1272 Gefion

1272 Gefion
Discovery
Discovered by	K. Reinmuth
Discovery site	Heidelberg Obs.
Discovery date	10 October 1931
Designations
MPC designation	(1272) Gefion
Pronunciation	/ˈɡeɪfiɒn/ or /ˈɡɛfiɒn/
Named after	Gefjon; (Norse mythology)
Alternative designations	1931 TZ1 · A917 SF
Minor planet category	main-belt · (middle); Gefion
Adjectives	Gefionian /ɡɛfiˈoʊniən/
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	99.50 yr (36,344 days)
Aphelion	3.2076 AU
Perihelion	2.3604 AU
Semi-major axis	2.7840 AU
Eccentricity	0.1521
Orbital period (sidereal)	4.65 yr (1,697 days)
Mean anomaly	215.36°
Mean motion	0° 12m 43.92s / day
Inclination	8.4185°
Longitude of ascending node	321.56°
Argument of perihelion	3.6671°
Physical characteristics
Dimensions	6.965±0.169 km; 7.016±0.066 km; 12.62 km (calculated)
Synodic rotation period	2.900±0.0012 h; 3.087±0.0005 h
Geometric albedo	0.057 (assumed); 0.2489±0.0256; 0.252±0.041
Spectral type	SMASS = Sl; C (assumed)
Absolute magnitude (H)	12.785±0.005 (R) · 12.9 · 13.0 · 13.01±0.21 · 13.22

1272 Gefion, provisional designation 1931 TZ₁, is a stony asteroid and parent body of the Gefion family from the central region of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 10 October 1931, by astronomer Karl Reinmuth at the Heidelberg Observatory in Germany. The asteroid was named after Gefjon from Norse mythology.^[3]

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^ Joseph Thomas (1915) Universal Pronouncing Dictionary of Biography and Mythology
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^ Charles Dickens, ed. 1861. All the year round, 4:445.
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[2] Joseph Thomas (1915) Universal Pronouncing Dictionary of Biography and Mythology

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[5] Charles Dickens, ed. 1861. All the year round, 4:445.

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1272 Gefion

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