Leo IV (dwarf galaxy)

Leo IV Dwarf Galaxy[1]
View of the sparse stars of Leo IV, hardly distinguishable from the background.[2]
Observation data (J2000 epoch)
Constellation	Leo
Right ascension	11h 32m 57s[1]
Declination	−00° 32′ 00″[1]
Distance	520+49 −45 kly (160+15 −14 kpc)[3] 154±4 kpc[4]
Apparent magnitude (V)	15.9±0.5[3]
Characteristics
Type	dSph[3]
Apparent size (V)	5.7′[4]
Other designations
Leo IV,[1] PGC 4713561

Leo IV is a dwarf spheroidal galaxy situated in the Leo constellation, discovered in 2006 in the data obtained by the Sloan Digital Sky Survey.^[3] The galaxy is located at the distance of about 160 kpc from the Sun and moves away from the Sun with the velocity of about 130 km/s.^[3][5] It is classified as a dwarf spheroidal galaxy (dSph) meaning that it has an approximately round shape with the half-light radius of about 130 pc.^{[4][note 1]}

Leo IV is one of the smallest and faintest satellites of the

In 2008, another galaxy called Leo V was discovered in the vicinity of Leo IV. The former is located 20 kpc further from the Milky Way than the latter and 3 degrees (~ 10 kpc) away from it. These two galaxies may be physically associated with each other.^[8]

Notes

References