728 Leonisis

Minor Planet
name=728 Leonisis
discoverer=J. Palisa
discovery_date=February 16, 1912
designations=1912 NU; A907 UE;
1941 WR; 1968 UT
category=Main belt (Flora family)
epoch=August 8, 2005 (JD 2453600.5)
semimajor=337.2 Gm (2.254 AU)
perihelion=307.7 Gm (2.057 AU)
aphelion=366.7 Gm (2.451 AU)
eccentricity=0.0873
period=1236.0 d (3.38 a)
inclination=4.258°
asc_node=82.701°
arg_peri=55.194°
mean_anomaly=232.528°
speed=19.80 km/s
dimensions="unknown"
mass="unknown"
density="unknown"
gravity="unknown"
escape_velocity="unknown"
rotation=~0.2 d (~5 h) ^{[http://www.psi.edu/pds/archive/lc.html]}
spectral_class=A or Ld
abs_mag=12.8
albedo="unknown"
temperature=?

728 Leonisis is an asteroid of the Flora family, discovered by J. Palisa in 1912 in Vienna. There is some uncertainty as to its spectral class. It has been previously placed in the rare A and Ld classes ^{[http://www.psi.edu/pds/resource/taxonomy.html]} . 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.

External links

* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.txt Discovery Circumstances: Numbered Minor Planets]