774 Armor

774 Armor is a minor planet (specifically an asteroid) orbiting in the main belt. It was discovered on 13 December 1913, in Paris by French astronomer Charles le Morvan and was named after the Celtic region of Armorica.[2] The asteroid is orbiting at a distance of 3.05 AU with a period of 5.32 yr and an eccentricity of 0.169. The orbital plane is inclined by an angle of 5.56° to the plane of the ecliptic.[1]

In the SMASS-I taxonomy, this is classified as an S-type asteroid.[3] It spans a girth of approximately 50 km.[1] The rotation of this asteroid is commensurate with the length of an Earth day, requiring measurements from more than one latitude for full coverage. Photometric observations from the US and Australia in 2012 provided an estimated rotation period of 25.107±0.005 h with a brightness variation of 0.16±0.02 in magnitude. This is consistent with the results of an earlier study in 2006.[4]

References

  1. ^ a b c "774 Armor (1913 TW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
  2. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 72, ISBN 9783642297182.
  3. ^ Burbine, Thomas H.; Binzel, Richard P. (October 2002), "Small Main-Belt Asteroid Spectroscopic Survey in the Near-Infrared", Icarus, 159 (2): 468–499, Bibcode:2002Icar..159..468B, doi:10.1006/icar.2002.6902.
  4. ^ Oey, Julian; et al. (April 2013), "Lightcurve Analsyis of 774 Armor and 3161 Beadell", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 40 (2): 64, Bibcode:2013MPBu...40...64O.
  • Lightcurve plot of 774 Armor, Palmer Divide Observatory, B. D. Warner (2006)
  • Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
  • Dictionary of Minor Planet Names, Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • 774 Armor at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 774 Armor at the JPL Small-Body Database Edit this at Wikidata
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
Authority control databases Edit this at Wikidata
  • JPL SBDB
  • MPC


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