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Maxima of the long period variable U Arietis on the 9th December 2017.



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HD 19737
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Maxima of the long period variable U Arietis on the 3rd December 2016.  

U Arietis



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Maxima of long period variable U Arietis on the 28th November, 2015. 

U Arietis (also U Ari, IRAS 03082+1436 and HD 19737) is a Mira variable star located 2530 light-years away in the constellation of Aries.
The star is a oxygen rich variable of spectral type M4.5-7.5e whose brightness varies between magnitude +7.2 and +15.2 over a period of 371.13 days.
U Arietis has a diameter that is ~610 times larger than the sun, and shines with a brightness 8400 ± 3500 times the solar luminosity . The effective temperature estimated as 2280 ± 80 K, is lower than what would be expected for a Mira variable (~3000 K).
As is typical for this kind of variable, there is stellar mass loss, in the case of U Arietis it is about 57 x 10 -8 solar masses per year.



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Maxima of long period variable U Arietis on the 22nd November, 2014. 



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Maxima of long period variable U Arietis on the 16th November, 2013. 



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Maxima of long period variable U Arietis on the 10th November, 2012. 

Magnitude: 7.2-15.2 
Period: 371.13 days 
Type: Mira

Position (2000):     RA 03 11 03.04 | Dec +14° 48' 00.1'' 



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Maxima of long period variable U Arietis on the 8th December, 2011.

Magnitude: 8.1-14.6
Period: 371.13 days
Type: Mira

Position (2000):     RA 03 11 03.04 | Dec +14° 48' 00.1'' 



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Maxima of Variable Star U Arietis on the 6th November, 2011.

Magnitude range: 7.2 - 15.2  

Period: 371.1 days

Type: Mira     

Position (2000):     RA 03 11 03.04 | Dec +14° 48' 00.1''  

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



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