578 Happelia Explained

Minorplanet:	yes
Background:	D6D6D6
578 Happelia
Mpc Name:	(578) Happelia
Alt Names:	1905 RZ
Discovered:	1 November 1905
Epoch:	31 July 2016 (JD 2457600.5)
Eccentricity:	0.19374
Semimajor:	2.7494AU
Perihelion:	2.2168AU
Aphelion:	3.2821abbr=onNaNabbr=on
Period:	4.56 yr (1665.2 d)
Inclination:	6.1525°
Asc Node:	29.411°
Arg Peri:	261.400°
Mean Motion:	/ day
Orbit Ref:	^[1]
Observation Arc:	110.46 yr (40344 d)
Uncertainty:	0
Abs Magnitude:	9.4
Rotation:	10.061abbr=onNaNabbr=on
Mean Radius:	km

578 Happelia is a minor planet orbiting the Sun. On 24 February 2017 a possible small 3-kilometer moon was found orbiting the asteroid, based on occultation observations.^[2]

External links

• Lightcurve plot of 578 Happelia, Palmer Divide Observatory, B. D. Warner (2008)
• Lightcurves 578 Happelia, tripod.com
• Asteroid Lightcurve Database (LCDB), query form (info)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center

Notes and References

1. Web site: 578 Happelia (1905 RZ) . https://web.archive.org/web/20200918002842/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=578;cad=1 . dead . 18 September 2020 . . . 5 May 2016.
2. Web site: (578) Happelia occultation 2017/02/24. www.asteroidoccultation.com. 12 March 2017. https://web.archive.org/web/20170312195612/http://www.asteroidoccultation.com/observations/Results/Data2017/20170224_HappeliaProfile_Damit660_Satellite.gif. 12 March 2017. dead.