* Astronomy

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BD+15° 2918

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RE: R Serpentis

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HD 141850

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RE: R Serpentis

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R Serpentis (HD 141850) was discovered on the 9th June 1826 by the German astronomer Karl Ludwig Harding during the preperation of the Berlin Academic star charts, a project of the Royal Prussian Academy of Sciences. The yellowish-red star is located 600 light years away, midway between Beta and Gamma.

R Serpentis, however, had been observed prior to Harding's time, though not recognized as a variable; it appears on a French chart made by D'Agelet in March 1783, thus preserving for us the approximate date of a very early maximum.
Source

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Maxima of the variable star, R Serpentis, on the 5th September 2014

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Maxima of the variable star, R Serpentis, on the 13th September 2013

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Maxima of the variable star, R Serpentis, on the 22nd September 2012

Magnitude range: 5.2 - 14.4
Period: 356.4 days
Type: Mira

Position (J2000): R.A. 15 50 41.7341 | Dec. +15° 08' 01.108''

Google earth file: R Serpentis.kmz (2kb, kmz)

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Maxima of the variable star R Serpentis on the 2nd October, 2011

Magnitude range: 5.2 - 14.4
Period=356.4days
Type=M

Position (J2000): R.A. 15 50 41.7341 | Dec. +15° 08' 01.108''