Alphecca

Also known as Alpha Coronae Borealis, 5 Coronae Borealis, Gemma, Gnosia Stella Coronae, α CrB, α Coronae Borealis

binary star in the constellation Corona Borealis

Key facts

Constellation: Corona Borealis
Right ascension: 15 34 41.268
Declination: +26 ° 42 ′ 52.89 ″
Spectral type: A0V + G5V
U b color index: −0.03
B v color index: −0.02
Variable type: Eclipsing binary

via Wikipedia infobox

Wikidata facts

Distance from Earth: 74.7
Diameter: 3780000
Mass: 2.58
Image: Alpha Coronae Borealis.jpg

Show 14 more facts

catalog code: UBV M 20847
spectral class: A0
apparent magnitude: 2.21
right ascension: 233.671950015
declination: 26.714692781
effective temperature: 10900
stellar rotational velocity: 120
parallax: 0.05
radial velocity: -15.6
surface gravity: 20000
right ascension component of proper motion: 121
declination component of proper motion: -89
age estimated by a dating method: 0.314
metallicity: 0.2

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Article

Alpha Coronae Borealis (α Coronae Borealis, abbreviated Alpha CrB, α CrB), officially named Alphecca /ælˈfɛkə/, is an eclipsing binary star in the constellation of Corona Borealis. It is located about 75 light years from the Sun and contains two main sequence stars, one class A and one class G.

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