3554 Amun

3554 Amun is an Aten asteroid, meaning it crosses Earth's orbit, and a Venus-crosser. It was discovered on 4 March 1986 by Carolyn and Eugene Shoemaker at Mount Palomar Observatory, and named for the ancient Egyptian deity Amun.[2] Amun was the fifth Aten asteroid to be numbered.

Photometric observations of 3554 Amun during 2017–2018 were combined to determine a rotation period of 2.53029±0.00002 hours.[3] It has been classified as an M-type asteroid in the Tholen taxonomy, X-type in the Bus taxonomy, and C-, X-, and D-type in the Bus-DeMeo taxonomy. The featureless optical spectrum has a similar slope to the Tagish Lake meteorite, although 3554 Amun is not considered the source.[4] The infrared spectrum of 3554 Amun was found to match a D-type asteroid taxonomy.[5] The estimated diameter is 3.341 kilometers,[1] making it one of the smallest known asteroids to have an M-type classification.[citation needed]

Amun was once considered metallic, based on an M-type optical spectrum. In Mining the Sky, planetary scientist John S. Lewis calculated the purported value of a metallic 3554 Amun at $20 trillion.[6] (6178) 1986 DA is another M-type near-Earth asteroid with lower inclination that is actually metallic.

Amun passes close to Venus, and in 1964, 2034, and 2103 comes within 10 Gm of it.[1]

References

  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 3554 Amun (1986 EB)" (2014-02-19 last obs (arc=27.9 yr)). Jet Propulsion Laboratory. Retrieved 11 April 2016.
  2. ^ Schmadel, Lutz (2003). Dictionary of minor planet names. Vol. 1. Springer. p. 299. ISBN 9783540002383.
  3. ^ Koehn, Bruce W.; et al. (October 2014). "Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2009 January through 2009 June". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 41 (4): 286–300. Bibcode:2014MPBu...41..286K.
  4. ^ Izawa, M. R. M.; et al. (July 2015). "Variability, absorption features, and parent body searches in "spectrally featureless" meteorite reflectance spectra: Case study - Tagish Lake". Icarus. 254: 324–332. Bibcode:2015Icar..254..324I. doi:10.1016/j.icarus.2015.04.013.
  5. ^ Thomas, Cristina A.; et al. (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus. 228: 217–246. arXiv:1310.2000. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. S2CID 119278697.
  6. ^ "NSS Review: Mining the Sky". www.nss.org. Archived from the original on 14 May 2012. Retrieved 26 February 2018.

External links

  • Economic value of asteroid 3554 Amun
  • 3554 Amun at NeoDyS-2, Near Earth Objects—Dynamic Site
    • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
  • 3554 Amun at ESA–space situational awareness
    • Ephemerides · Observations · Orbit · Physical properties · Summary
  • 3554 Amun at the JPL Small-Body Database Edit this at Wikidata
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
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