45 Eugenia

45 Eugenia
Discovery[1]
Discovered byH. Goldschmidt
Discovery date27 June 1857
Designations
(45) Eugenia
Pronunciation/juːˈdʒiːniə/[2]
Named after
Empress Eugénie
1941 BN
Main belt
AdjectivesEugenian
Orbital characteristics[3]
Epoch 26 November 2005 (JD 2453701.5)
Aphelion440.305 Gm (2.943 AU)
Perihelion373.488 Gm (2.497 AU)
406.897 Gm (2.720 AU)
Eccentricity0.082
1638.462 d (4.49 a)
45.254°
Inclination6.610°
147.939°
85.137°
Known satellitesPetit-Prince
S/2004 (45) 1
Physical characteristics
Dimensions232 × 193 × 161 km[4]
305 × 220 × 145 km[5][6]
94±1 km[7]
107.3±2.1 km[5]
Mass(5.8±0.1)×1018 kg[7]
(5.69±0.1)×1018 kg[4]
(5.8±0.2)×1018 kg[8][9][a]
Mean density
1.66±0.07 g/cm3[7]
1.1±0.1 g/cm3[4]
1.1±0.3 g/cm3[9]
Equatorial surface gravity
0.017 m/s²[b]
Equatorial escape velocity
0.071 km/s[b]
0.2375 d (5.699 h)[10]
117±10°
−30±10°[6]
124±10°
0.065 (calculated)[7]
0.040±0.002[5]
F[11]
7.46[5]

45 Eugenia is a large asteroid of the asteroid belt. It is famed as one of the first asteroids to be found to have a moon orbiting it. It was also the second triple asteroid to be discovered, after 87 Sylvia.

  1. ^ Cite error: The named reference mpc_numbered was invoked but never defined (see the help page).
  2. ^ "Eugenia". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  3. ^ Cite error: The named reference astorb was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Baer was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference IRAS was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kaasalainen02 was invoked but never defined (see the help page).
  7. ^ a b c d P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
  8. ^ Cite error: The named reference Marchis was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Marchis04 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference PDS lc was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference PDStax was invoked but never defined (see the help page).


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