59 Serpentis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 18h 27m 12.50775s |
| Declination | +00° 11′ 45.9912″ |
| Apparent magnitude (V) | 5.17 – 5.29 |
| Characteristics | |
| Spectral type | A0Vs + G:III |
| U−B color index | +0.21 |
| B−V color index | +0.48 |
| Variable type | Irregular? |
| Astrometry | |
| Radial velocity (Rv) | −23.3 km/s |
| Proper motion (μ) | RA: −3.67 mas/yr Dec.: −8.61 mas/yr |
| Parallax (π) | 6.95±0.63 mas |
| Distance | 470 ± 40 ly (140 ± 10 pc) |
| Absolute magnitude (MV) | −0.57 |
| Details | |
| Aa | |
| Mass | 6.32 M☉ |
| Radius | 13 R☉ |
| Temperature | 5,093 K |
| Age | 316 Myr |
| Ab1 | |
| Mass | 4.13 M☉ |
| Radius | 2.2 R☉ |
| Temperature | 9,700 K |
| Ab2 | |
| Mass | 3.39 M☉ |
| Radius | 1.8 R☉ |
| Temperature | 9,700 K |
| Ba | |
| Mass | 3.17 M☉ |
| Radius | 1.7 R☉ |
| Luminosity | 10.1 L☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 7,981 K |
| Other designations | |
| 59 Ser, d Ser, HIP 90441, HR 6918, BD+00°3936, ADS 11353, CCDM J18272+0012 | |
| A: HD 169985 | |
| B: HD 169985 | |
| Database references | |
| SIMBAD | data |
| A | |
| B | |
59 Serpentis, also known as d Serpentis, is a multiple star in the constellation Serpens. The system shows irregular variations in brightness between magnitudes 5.17 and 5.29.