578 Happelia

578 Happelia
	A three-dimensional model of 578 Happelia based on its light curve
Discovery
Discovered by	M. F. Wolf
Discovery site	Heidelberg
Discovery date	1 November 1905
Designations
MPC designation	(578) Happelia
Alternative designations	1905 RZ
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	110.46 yr (40344 d)
Aphelion	3.2821 AU (491.00 Gm)
Perihelion	2.2168 AU (331.63 Gm)
Semi-major axis	2.7494 AU (411.30 Gm)
Eccentricity	0.19374
Orbital period (sidereal)	4.56 yr (1665.2 d)
Mean anomaly	200.53°
Mean motion	0° 12m 58.284s / day
Inclination	6.1525°
Longitude of ascending node	29.411°
Argument of perihelion	261.400°
Physical characteristics
Mean radius	34.645±1.05 km
Synodic rotation period	10.061 h (0.4192 d)
Geometric albedo	0.0769±0.005
Absolute magnitude (H)	9.4

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]

References

^ "578 Happelia (1905 RZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 5 May 2016.
^ "(578) Happelia occultation 2017/02/24". www.asteroidoccultation.com. Archived from the original on 12 March 2017. Retrieved 12 March 2017.

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 Archived 16 December 2017 at the Wayback Machine)
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
578 Happelia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
578 Happelia at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it.

[jpldata-1] "578 Happelia (1905 RZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 5 May 2016.

[moon-2] "(578) Happelia occultation 2017/02/24". www.asteroidoccultation.com. Archived from the original on 12 March 2017. Retrieved 12 March 2017.

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