Astronomical objects discovered in 2009

moon of Saturn

moonlet of Saturn

thumb|upright|250px|UDFy-38135539 is within the annotated red circle thumb|right|250px|Location of UDFy-38135539 (HUDF.YD3)

gamma-ray burst

asteroid

galaxy

Ilmarë, formal designation '''''', is the only known moon of the large Kuiper belt object 174567 Varda. It was discovered by Keith Noll et al. in 2009, at a separation of about 0.12 arcsec, using discovery images taken by the Hubble Space Telescope on 26 April 2009, and reported in 2011. At approximately 403 km in diameter (about 45% that of its primary), it is the fourth-largest known moon of a trans-Neptunian object, after Pluto I Charon, Eris I Dysnomia, and Orcus I Vanth. Assuming that Ilmarë has the same albedo and density as Varda, Ilmarë would constitute approximately 8.4% of the s

astronomical object

asteroid

near-Earth asteroid

galaxy

trans-Neptunian object

asteroid

asteroid

KOI-256 is a double star located in the constellation Draco approximately from Earth. While observations by the Kepler spacecraft suggested the system contained a gas giant exoplanet orbiting a red dwarf, later studies determined that KOI-256 was a binary system composed of the red dwarf orbiting a white dwarf.

asteroid

asteroid

Jupiter trojan

asteroid

asteroid

asteroid

Transneputian object

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

main belt asteroid

asteroid

asteroid

asteroid

asteroid

gamma-ray burst

asteroid

asteroid

asteroid

asteroid

main-belt asteroid

asteroid

asteroid

asteroid

asteroid

comet

asteroid

asteroid

asteroid

asteroid

asteroid

Jovian asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid

asteroid