1272 Gefion

1272 Gefion
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date10 October 1931
Designations
(1272) Gefion
Pronunciation/ˈɡeɪfiɒn/ or /ˈɡɛfiɒn/[2]
Named after
Gefjon[3]
(Norse mythology)
1931 TZ1 · A917 SF
main-belt · (middle)
Gefion[4]
AdjectivesGefionian /ɡɛfiˈoʊniən/[5]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc99.50 yr (36,344 days)
Aphelion3.2076 AU
Perihelion2.3604 AU
2.7840 AU
Eccentricity0.1521
4.65 yr (1,697 days)
215.36°
0° 12m 43.92s / day
Inclination8.4185°
321.56°
3.6671°
Physical characteristics
Dimensions6.965±0.169 km[6]
7.016±0.066 km[7]
12.62 km (calculated)[8]
2.900±0.0012 h[9]
3.087±0.0005 h[9]
0.057 (assumed)[8]
0.2489±0.0256[7]
0.252±0.041[6]
SMASS = Sl[1]
C (assumed)[8]
12.785±0.005 (R)[9] · 12.9[7] · 13.0[1] · 13.01±0.21[10] · 13.22[8]

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]

  1. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Joseph Thomas (1915) Universal Pronouncing Dictionary of Biography and Mythology
  3. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Ferret was invoked but never defined (see the help page).
  5. ^ Charles Dickens, ed. 1861. All the year round, 4:445.
  6. ^ a b Cite error: The named reference Masiero-2011 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference lcdb was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Waszczak-2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).