Discovered by J. Palisa Alternative names 1923 NM Aphelion 3.5220 AU (526.88 Gm) Discovered 21 March 1923 | Discovery date 21 March 1923 Observation arc 88.16 yr (32200 days) Perihelion 2.6535 AU (396.96 Gm) Orbits Sun Asteroid family Themis family Asteroid group Asteroid belt | |
Similar 242 Kriemhild, 220 Stephania, 276 Adelheid, 265 Anna, 528 Rezia | ||
996 Hilaritas is a Themistian asteroid. It was discovered in 1923 by Austrian astronomer Johann Palisa. Following Palisa's death in 1925, this asteroid was named for a "happy or contented mind"; qualities associated with the discoverer.
Photometric observations of this asteroid collected during 2010 show a rotation period of 10.052 ± 0.001 hours with a brightness variation of 0.65 ± 0.03 magnitude.
References
996 Hilaritas Wikipedia(Text) CC BY-SA