728 Leonisis
Encyclopedia
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.
Asteroid
Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...
of the Flora family
Flora family
The Flora family of asteroids is a large grouping of S-type asteroids in the inner main belt, whose origin and properties are relatively poorly understood at present...
, discovered by J. Palisa in 1912 in Vienna
Vienna
Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...
.
There is some uncertainty as to its spectral class. It has been previously placed in the rare A
A-type asteroid
A-type asteroids are relatively uncommon inner-belt asteroids that have a strong, broad 1 µm olivine feature and a very reddish spectrum shortwards of 0.7 µm. They are thought to come from the completely differentiated mantle of an asteroid....
and Ld
L-type asteroid
L-type asteroids are relatively uncommon asteroids with a strongly reddish spectrum shortwards of 0.75 μm, and a featureless flat spectrum longwards of this. In comparison with the K-type, they exhibit a more reddish spectrum at visible wavelengths and a flat spectrum in the infrared.These...
classes http://www.psi.edu/pds/resource/taxonomy.html. These are generally "stony" spectra, but with significant deviations from the usual S-type
S-type asteroid
S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.-Characteristics:...
. The unusual spectrum brings Leonisis' membership in the Flora family into doubt.