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728 Leonisis is an asteroid of the Flora family, discovered by Austrian astronomer Johann Palisa on 16 February 1912 from Vienna.

There is some uncertainty as to its spectral class. It has been previously placed in the rare A and Ld classes. These are generally "stony" spectra, but with significant deviations from the usual S-type. The unusual spectrum brings Leonisis' membership in the Flora family into doubt.

Photometric observations of this asteroid from the Organ Mesa Observatory in Las Cruces, New Mexico, during 2010 gave a light curve with a period of 5.5783 ± 0.0002 hours and a brightness variation of 0.20 ± 0.04 magnitude.

References

1. ^ Yeomans, Donald K., "728 Leonisis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
2. ^ Pilcher, Frederick (July 2010), "Period Determinations for 11 Parthenope, 35 Leukothea, 38 Leda, 111 Ate, 194 Prokne, 262 Valda, 728 Leonisis, and 747 Winchester", The Minor Planet Bulletin, vol. 37, no. 3, pp. 119–122, Bibcode:2010MPBu...37..119P.
3. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
4. "Asteroid Taxonomy". Archived from the original on 10 March 2007. Retrieved 27 December 2008.

External links

• 728 Leonisis at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 728 Leonisis at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an S-type asteroid native to the asteroid belt is a stub. You can help Misplaced Pages by expanding it.

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• Minor planet object articles (numbered)
• Flora asteroids
• Named minor planets
• Astronomical objects discovered in 1912
• Discoveries by Johann Palisa
• S-type main-belt-asteroid stubs