Star
Vega
A0V main-sequence star
Vega served as the zero point of the photometric magnitude scale for decades. It spins so fast — about once every 16.5 hours — that it bulges at the equator.
In your sky
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Key facts
Distance
25 light-years
Apparent mag.
+0.03
Luminosity
~40 × Sun
Mass
~2.1 × Sun
Temperature
~9,600 K
Spectral type
A0V
True colour from its B–V index (0.00): a surface around 10100 K.
Did you know
- It was the first star other than the Sun to be photographed (1850).
- Due to precession it will be the pole star again around AD 13,700.
- A disk of dust surrounds it, discovered by IRAS in 1983.
