860 Ursina

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]

^ '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.
^ Cite error: The named reference Schmadel2012 was invoked but never defined (see the help page).
^ Cite error: The named reference MPB27_4 was invoked but never defined (see the help page).

[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] Cite error: The named reference Schmadel2012 was invoked but never defined (see the help page).

[MPB27_4-4] Cite error: The named reference MPB27_4 was invoked but never defined (see the help page).

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