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RR Ursae Minoris

Red giant in Ursa Minor

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Proper Name	None
Bayer Designation	None
Flamsteed Number	None
HR (BSC)	5589
HD	132813
Variable Designation	RR Ursae Minoris
Constellation	Ursa Minor
Right Ascension	14h 57m 35s
Declination	+65° 55' 57"
Distance	459 light years 141 parsecs
Magnitude	Apparent: +4.69 Absolute: -1.05
Spectral Class	M4.5III red giant
Optimum Visibility	May (Usually visible from northern latitudes)
Notes	RR Ursae Minoris is a red giant star categorised as a pulsating variable. Its magnitude varies from +4.53 to +4.73 over a period averaging 43.3 days, but as a semiregular variable, that period can vary by a considerable degree. This is a binary system, and the primary giant is known to have a companion star orbiting at a distance of at least 0.5 AU.

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