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860 Ursina
Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg
Discovery date	22 January 1917
Designations
MPC designation	(860) Ursina
Pronunciation	/ɜːrˈsaɪnə/
Alternative designations	1917 BD
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	113.24 yr (41362 days)
Aphelion	3.0938 AU (462.83 Gm)
Perihelion	2.5013 AU (374.19 Gm)
Semi-major axis	2.7975 AU (418.50 Gm)
Eccentricity	0.10590
Orbital period (sidereal)	4.68 yr (1709.1 d)
Mean anomaly	247.967°
Mean motion	0° 12m 38.304s / day
Inclination	13.297°
Longitude of ascending node	309.388°
Argument of perihelion	21.338°
Earth MOID	1.49307 AU (223.360 Gm)
Jupiter MOID	2.21886 AU (331.937 Gm)
TJupiter	3.279
Physical characteristics
Mean radius	14.66±0.8 km
Synodic rotation period	9.386 h (0.3911 d)
Geometric albedo	0.1618±0.020
Absolute magnitude (H)	10.26

860 Ursina is a minor planet orbiting the Sun that was discovered in 1917 by German astronomer Max Wolf. The origin of the name is unknown.^[3]

Photometric observations of this asteroid collected during 1999 show a rotation period of 9.386 ± 0.002 hours with a brightness variation of 0.22 magnitude.^[4]

References

^ 'Ursinus' in Noah Webster (1884) A Practical Dictionary of the English Language
^ "860 Ursina (1917 BD)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.
^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 77, ISBN 3642297188.
^ Warner, B. (March 2000), "Asteroid Photometry at the Palmer Divide Observatory", The Minor Planet Bulletin, 27: 4–6, Bibcode:2000MPBu...27....4W.

External links

Lightcurve plot of 860 Ursina, Palmer Divide Observatory, B. D. Warner (1999)
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
860 Ursina at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
860 Ursina 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.

[1] 'Ursinus' in Noah Webster (1884) A Practical Dictionary of the English Language

[jpldata-2] "860 Ursina (1917 BD)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.

[Schmadel2012-3] Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 77, ISBN 3642297188.

[MPB27_4-4] Warner, B. (March 2000), "Asteroid Photometry at the Palmer Divide Observatory", The Minor Planet Bulletin, 27: 4–6, Bibcode:2000MPBu...27....4W.

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