9 Andromedae
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 18m 23.32s [1] |
| Declination | +41° 46′ 25.2″ [1] |
| Apparent magnitude (V) | 5.997 |
| Characteristics | |
| Spectral type | A7m |
| U−B color index | 0.17 |
| B−V color index | 0.21 |
| Variable type | Beta Lyrae |
| Astrometry | |
| Radial velocity (Rv) | -3.9 km/s |
| Proper motion (μ) | RA: -9.52 ± 0.36 [1] mas/yr Dec.: 11.26 ± 0.43 [1] mas/yr |
| Parallax (π) | 7.72 ± 0.51[1] mas |
| Distance | 420 ± 30 ly (130 ± 9 pc) |
| Absolute magnitude (MV) | 0.17 |
| Details | |
| Mass | 3.1 M☉ |
| Radius | 2.1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7.500–10.000 K |
| Metallicity | ? |
| Rotation | 0.008815879534565366 Year |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
9 Andromedae or AN Andromedae is a star in the constellation Andromeda. Its apparent magnitude is 5.98.
[edit] References
- ^ a b c d e van Leeuwen, F. (2007). "HIP 115065". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=114679. Retrieved 2010-03-21.
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