Gamma Serpentis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Serpens |
| Right ascension | 15h 56m 27.2s |
| Declination | +15° 39′ 42″ |
| Apparent magnitude (V) | 3.85 |
| Characteristics | |
| Spectral type | F6 V |
| U-B color index | -0.03 |
| B-V color index | 0.48 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 7 km/s |
| Proper motion (μ) | RA: 311.2 mas/yr Dec.: -1282.17 mas/yr |
| Parallax (π) | 89.92 ± 0.72 mas |
| Distance | 36.3 ± 0.3 ly (11.12 ± 0.09 pc) |
| Absolute magnitude (MV) | 3.62 |
| Details | |
| Mass | 1.25 M☉ |
| Radius | 1.4 R☉ |
| Luminosity | 2.9 L☉ |
| Temperature | 6280 K |
| Metallicity | 67% |
| Rotation | 8 km/s. (<9 days) |
| Age | 3 × 109 years |
| Other designations | |
Gamma Serpentis (γ Ser / γ Serpentis) is a star in the constellation Serpens, in its head (Serpens Caput). Gamma Serpentis has the traditional name Ainalhai (Ainalhay, Ain al Hay, Ein Elhai), from the Arabic title عين الحية ayn al-ħayya[h] meaning "[The] Eye of the Serpent".
Gamma Serpentis is a yellow-white F-type main sequence dwarf with an apparent magnitude of +3.85. Occasionally Gamma Serpentis is listed as having two 10th magnitude companions, but it appears that these stars are just optical neighbours. The Gamma Serpentis system is approximately 36.3 light years from Earth.
[edit] References
- HD 142860 -- Variable Star. SIMBAD Astronomical Database. Retrieved on 2007-01-23.
[edit] External links
- Gamma Serpentis by Professor Jim Kaler.
- Yale Bright Star Catalogue: γ Serpentis
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