Lambda Coronae Borealis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Lambda Coronae Borealis
Observation data
Epoch J2000      Equinox
Constellation Corona Borealis
Right ascension 15h 55m 47.58679s
Declination +37° 56′ 49.0491″
Apparent magnitude (V) 5.44
Absolute magnitude (MV) 2.33[1]
Other designations
λ CrB, 12 Coronae Borealis, Gj 9531, HR 5936, HIP 78012, HD 142908
Database references

Lambda Coronae Borealis (λ Coronae Borealis), is a star located in the constellation Corona Borealis. Lambda Coronae Borealis is also known as HR 5936, and HD 142908. The star is located at Right Ascension 15h 55m 47s and Declination 37 deg 56 arcmin 49 arcsec.

Lambda Coronae Borealis is a binary star system, where A and B are separated by 98 arcsec. Lambda Coronae Borealis A is an F0IV subgiant star with an apparent visual magnitude of +5.45, and an absolute visual magnitude of +2.34. Lambda Borealis A has an effective temperature of 7500k and a mass of 1.4 solar masses. Lambda Coronae Borealis B, also known as BD+38 2712B has a visual magnitude of +10.

The system is located at a distance of 41 parsecs, or 135.1 ly


  1. ^ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399Freely accessible, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911.