RR Coronae Borealis

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Not to be confused with R Coronae Borealis.
RR Coronae Borealis
Observational data
Epoch: J2000.0 [1]
Constellation: Corona Borealis [1]
Right ascension: 15h 41m 26.22899s [1]
Declination: +38° 33′ 26.5958″ [1]
Apparent magnitude: 7.3-8.2[2]

RR Coronae Borealis (RR CrB, HD 140297, HIP 76844) is a M3-type semiregular variable star located in the constellation Corona Borealis with a parallax of 2.93mas being a distance of 341 parsecs (1,110 ly).[1] It varies between magnitudes 7.3 and 8.2 over 60.8 days.[2] Located around 1228 light-years distant, it shines with a luminosity approximately 2180 times that of the Sun and has a surface temperature of 3309 K.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 SIMBAD, RR Coronae Borealis (accessed 20 February 2013)
  2. ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.


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