U Aquilae
Encyclopedia
U Aquilae or ADS 12503 A is classical Cepheid variable
(delta Cep type).
Cepheid variable
A Cepheid is a member of a class of very luminous variable stars. The strong direct relationship between a Cepheid variable's luminosity and pulsation period, secures for Cepheids their status as important standard candles for establishing the Galactic and extragalactic distance scales.Cepheid...
(delta Cep type).
Components
| NAME | Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:... |
Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and... |
Apparent magnitude Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere... (V) |
Spectral type | Database references |
|---|---|---|---|---|---|
| ADS 12503 B (BD-07 4968C) | 19h 29m 20.8s | -07° 02' 03 | 14.0 | G4 | Simbad |
| ADS 12503 C (ADS 12503 D) | 14.0 | Simbad |