Nu Serpentis
A-type main sequence star in the constellation Serpens
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ν Serpentis, Latinized as Nu Serpentis, is a solitary[10] star in the Serpens Cauda section of the equatorial constellation of Serpens. It is a white-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.32.[2] Based upon an annual parallax shift of 16.05 mas as seen from the Sun,[1] it is about 203 light years from the Sun. The star is drifting further away with a radial velocity of +5 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 17h 20m 49.66149s[1] |
| Declination | −12° 50′ 48.7533″[1] |
| Apparent magnitude (V) | 4.32[2] |
| Characteristics | |
| Spectral type | A2V[3] |
| U−B color index | +0.04[4] |
| B−V color index | +0.03[4] |
| Astrometry | |
| Radial velocity (Rv) | +4.80[5] km/s |
| Proper motion (μ) | RA: +43.40[1] mas/yr Dec.: +2.61[1] mas/yr |
| Parallax (π) | 16.05±0.26 mas[1] |
| Distance | 203 ± 3 ly (62 ± 1 pc) |
| Absolute magnitude (MV) | 0.35[2] |
| Details | |
| Mass | 2.64[6] M☉ |
| Radius | 3.0[7] R☉ |
| Luminosity | 76[6] L☉ |
| Surface gravity (log g) | 3.95[8] cgs |
| Temperature | 9,120[6] K |
| Metallicity [Fe/H] | 0.00[9] dex |
| Rotational velocity (v sin i) | 123[6] km/s |
| Age | 350[10] Myr |
| Other designations | |
| ν Ser, 53 Serpentis, BD−12°4722, FK5 3376, GC 23424, HD 156928, HIP 84880, HR 6446, SAO 160479, ADS 10481, CCDM J17208-1251A, WDS J17208-1251A, GSC 05653-01431[11] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A2V,[3] and is generating energy through hydrogen fusion at its core. It is 350[10] million years old with a high rate of spin, showing a projected rotational velocity of 123 km/s.[6] The star has 2.64[6] times the mass of the Sun and 3.0[7] times the Sun's radius. It is radiating 76 times the Sun's luminosity from its photosphere at an effective temperature of 9,120 K.[6] Nu Serpentis has an optical companion, a magnitude +9.4 star at an angular separation of 46 arcseconds.[12]