HD 3
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 05m 09.90s |
| Declination | +45° 13′ 45.0″ |
| Apparent magnitude (V) | 6.71[1] |
| Distance | 453 ly (139[1] pc) |
| Spectral type | A1Vn[1] |
HD 3 is a triple star located 139 parsecs (450 ly) away in the constellation Andromeda. The primary component, with a spectral type of A1Vn and apparent magnitude of 6.71,[1] is just on the limit of naked-eye visibility under the best conditions on Earth. The secondary and tertiary components have apparent magnitudes of 10.53[2] and 13.5 respectively.[3]
References
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- HD 3 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
00h 05m 09.90s, +45° 13′ 45.0″
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