60 Serpentis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 18h 29m 40.97948s |
| Declination | −01° 59′ 07.1058″ |
| Apparent magnitude (V) | 5.38 |
| Characteristics | |
| Spectral type | K0 III |
| B−V color index | 0.961±0.004 |
| Astrometry | |
| Radial velocity (Rv) | +28.36±0.34 km/s |
| Proper motion (μ) | RA: −85.35 mas/yr Dec.: −34.31 mas/yr |
| Parallax (π) | 25.16±0.31 mas |
| Distance | 130 ± 2 ly (39.7 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.25±0.07 |
| Details | |
| Mass | 1.81±0.49 M☉ |
| Radius | 8 R☉ |
| Luminosity | 35 L☉ |
| Surface gravity (log g) | 2.92±0.11 cgs |
| Temperature | 5,059±92 K |
| Metallicity [Fe/H] | −0.08 dex |
| Rotational velocity (v sin i) | 3.9 km/s |
| Age | 1.26+0.19 −0.16 Myr |
| Other designations | |
| c Ser, 60 Ser, BD−02°4641, FK5 1480, HD 170474, HIP 90642, HR 6935, SAO 142348 | |
| Database references | |
| SIMBAD | data |
60 Serpentis, also known as c Serpentis, is a single, orange-hued star in Serpens Cauda, the eastern section of the constellation Serpens. It is faintly visible to the naked eye with an apparent visual magnitude of 5.38. The distance to this star, as estimated from its annual parallax shift of 25.16±0.31 mas, is approximately 130 light years. It is moving further from the Sun with a heliocentric radial velocity of +28 km/s, having approached as close as 107 ly (32.7 pc) some 1.9 million years ago.
This is an evolved K-type giant star with a stellar classification of K0 III, having used up its core hydrogen and expanded. At the age of around 1.26 billion years, it currently belongs to the so-called "red clump", which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star has an estimated 1.8 times the mass of the Sun and 8 times the Sun's radius. It is radiating 35 times the Sun's luminosity from its enlarged photosphere at an effective temperature of about 5,059 K.