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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

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

• 996 Hilaritas at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 996 Hilaritas at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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• Minor planet object articles (numbered)
• Themis asteroids
• Discoveries by Johann Palisa
• Named minor planets
• B-type asteroids (Tholen)
• Astronomical objects discovered in 1923
• C-type main-belt-asteroid stubs