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U Ori
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Maxima of the variable star U Orionis (HD 39816) on the 30th January 2018.



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L

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SAO 77730
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Maxima of the variable star U Orionis (HD 39816) on the 27th January 2017.

Magnitude range: 4.8 - 13.0
Period: 368.3days    
Type: Mira   

Position (J2000):     R.A. 05 55 49.16994  |  Dec. +20° 10' 30.6872''

U Orionis



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U Orionis
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HD 39816
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Maxima of the variable star U Orionis on the 24th January, 2016.



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Nova Orionis 1885
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U Orionis (also HIP 28041, HD 39816, Nova Ori 1885 and SAO 77730) is a Mira-type long period variable star located 997.56 light-years away in the constellation Orion.
It has a magnitude range of +4.8 and +13.0, with a period of 372.4 days.
The variable star was discovered by amateur Irish astronomer John Ellard Gore (1845-1910) on the 13th December 1885, and initially was thought to be a nova (Nova Ori 1885) in the early stages of decline, but a spectrum taken at Harvard showed features similar to that of Mira. Thus U Orionis became the first long period variable to be identified by a photograph of its spectrum.

Right ascension05h 55m 49.1689s, Declination+20° 10' 30.687"

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RE: U Orionis
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Maxima of the variable star U Orionis on the 21st January, 2015.



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HD 39816
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Maxima of the variable star U Orionis on the 18th January, 2014.



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U Orionis
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Maxima of the variable star U Orionis on the 12th January, 2012.

Magnitude range: 4.8 - 13.0
Period=368.3days   
Type: Mira  
 
Position (J2000):     R.A. 05 55 49.16994  |  Dec. +20° 10' 30.6872''

Google earth file: U Orionis.kmz (1kb, kmz)



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