996 Hilaritas

From Wikipedia, the free encyclopedia
Jump to: navigation, search
996 Hilaritas
Discovery
Discovered by J. Palisa
Discovery site Vienna
Discovery date 21 March 1923
Designations
1923 NM
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 88.16 yr (32200 days)
Aphelion 3.5220 AU (526.88 Gm)
Perihelion 2.6535 AU (396.96 Gm)
3.0878 AU (461.93 Gm)
Eccentricity 0.14063
5.43 yr (1981.8 d)
93.831°
0° 10m 53.94s / day
Inclination 0.65948°
347.404°
147.140°
Earth MOID 1.66636 AU (249.284 Gm)
Jupiter MOID 1.52147 AU (227.609 Gm)
Jupiter Tisserand parameter 3.210
Physical characteristics
Mean radius
14.765±0.65 km
10.05 h (0.419 d)
0.0901±0.009
10.88

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.[2]

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.[3]

References[edit]

  1. ^ "996 Hilaritas (1923 NM)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016. 
  2. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 85, ISBN 3642297188. 
  3. ^ Strabla, Luca; Quadri, Ulisse; Girelli, Roberto (January 2011), "Lightcurve Analysis of 996 Hilaritas", The Minor Planet Bulletin 38 (1): 14–15, Bibcode:2011MPBu...38...14S. 

External links[edit]