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495 Eulalia information


495 Eulalia
Modelled shape of Eulalia from its lightcurve
Discovery
Discovered byMax Wolf
Discovery siteHeidelberg Observatory
Discovery date25 October 1902
Designations
MPC designation
(495) Eulalia
Pronunciation/jˈlliə/
Named after
the discoverer's wife's grandmother[1]
Alternative designations
1902 KG
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc113.10 yr (41309 d)
Aphelion2.8101 AU (420.38 Gm)
Perihelion2.1645 AU (323.80 Gm)
Semi-major axis
2.4873 AU (372.09 Gm)
Eccentricity0.12977
Orbital period (sidereal)
3.92 yr (1432.8 d)
Mean anomaly
5.5120°
Mean motion
0° 15m 4.536s / day
Inclination2.2795°
Longitude of ascending node
186.478°
Argument of perihelion
206.971°
Physical characteristics
Mean radius
19.425±0.7 km
Synodic rotation period
28.967 h (1.2070 d)
Geometric albedo
0.0571±0.004
Absolute magnitude (H)
10.78

Eulalia (minor planet designation: 495 Eulalia) is a minor planet, specifically an asteroid orbiting in the asteroid belt. Eulalia is very near the 3:1 Jupiter orbital resonance.[3]

Origin of 162173 Ryugu may be either 495 Eulalia or 142 Polana[4]
   Sun ·    Earth ·    162173 Ryugu ·    142 Polana ·    495 Eulalia

It is possible that the disruption of Eulalia's parent body resulted in a mass bombardment of the Earth and Moon 800 million years ago, forming the Copernicus crater on the Moon and involving about 50 times the amount of material of the Chicxulub impact on Earth at the beginning of the Cryogenian geological period.[5]

  1. ^ Schmadel, Lutz D. (2007). "(495) Eulalia". Dictionary of Minor Planet Names – (495) Eulalia. Springer Berlin Heidelberg. p. 54. doi:10.1007/978-3-540-29925-7_496. ISBN 978-3-540-00238-3.
  2. ^ Cite error: The named reference jpldata was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Walsh2013 was invoked but never defined (see the help page).
  4. ^ S. Sugita; et al. (19 March 2019). "The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes" (PDF). Science. 364 (6437): eaaw0422. Bibcode:2019Sci...364..252S. doi:10.1126/science.aaw0422. PMC 7370239. PMID 30890587.
  5. ^ Terada, K., Morota, T. & Kato, M. Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA. Nature Communications 11, 3453 (2020). https://doi.org/10.1038/s41467-020-17115-6

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