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967 Helionape
Discovery
Discovered by	W. Baade
Discovery site	Bergedorf
Discovery date	9 November 1921
Designations
MPC designation	(967) Helionape
Pronunciation	/hiːliˈɒnəpiː/
Alternative designations	1921 KV; A922 AB
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	91.53 yr (33433 days)
Aphelion	2.5998 AU (388.92 Gm)
Perihelion	1.8516 AU (277.00 Gm)
Semi-major axis	2.2257 AU (332.96 Gm)
Eccentricity	0.16807
Orbital period (sidereal)	3.32 yr (1212.8 d)
Mean anomaly	278.852°
Mean motion	0° 17m 48.552s / day
Inclination	5.4125°
Longitude of ascending node	82.358°
Argument of perihelion	231.930°
Physical characteristics
Mean radius	5.985±0.5 km
Synodic rotation period	3.234 h (0.1348 d)
Geometric albedo	0.1782±0.034
Absolute magnitude (H)	11.8

967 Helionape is an asteroid belonging to the Flora family of Main Belt asteroids. It was discovered by German astronomer Walter Baade at Hamburg Observatory on November 9, 1921, and was named after the Austrian theatrical actor Adolf von Sonnenthal.^[2] This object is orbiting the Sun at a distance of 2.23 AU with a period of 3.32 years and an eccentricity of 0.168. The orbital plane is inclined at an angle of 5.4° to the ecliptic.^[1]

Its diameter is about 12 km and it has an albedo of 0.178.^[1] Photometric observations in 2007 generated a light curve showing a rotation period of 3.234±0.002 h. The brightness amplitude during the measured period was 0.058±0.005 magnitude.^[3]

References

^ ^a ^b "967 Helionape (1921 KV)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.
^ Schmadel, Lutz D. (2013). Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 135. ISBN 9783662066157.
^ Apostolovska, Gordana; et al. (January 2009). "CCD Photometry of 967 Helionape, 3415 Danby, (85275) 1994 LY, 2007 DT103, and 2007 TU24". The Minor Planet Bulletin. 36 (1): 27–28. Bibcode:2009MPBu...36...27A.