59 Serpentis
Multiple star systemin the constellation Serpens / From Wikipedia, the free encyclopedia
This article is about d Serpentis. It is not to be confused with δ Serpentis.
59 Serpentis, also known as d Serpentis, is a multiple star in the constellation Serpens.[2] The system shows irregular variations in brightness between magnitudes 5.17 and 5.29.[3]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Serpens |
Right ascension | 18h 27m 12.50775s[2] |
Declination | 00° 11′ 45.9912″[2] |
Apparent magnitude (V) | 5.17 – 5.29[3] |
Characteristics | |
Spectral type | A0Vs + G:III[2] |
U−B color index | +0.21[4] |
B−V color index | +0.48[4] |
Variable type | Irregular?[3] |
Astrometry | |
Radial velocity (Rv) | −23.3[5] km/s |
Proper motion (μ) | RA: −3.67[6] mas/yr Dec.: −8.61[6] mas/yr |
Parallax (π) | 6.95 ± 0.63 mas[6] |
Distance | 470 ± 40 ly (140 ± 10 pc) |
Absolute magnitude (MV) | −0.57[7] |
Details | |
Aa | |
Mass | 6.32[8] M☉ |
Radius | 13[9] R☉ |
Temperature | 5,093[10] K |
Age | 316[10] Myr |
Ab1 | |
Mass | 4.13[8] M☉ |
Radius | 2.2[9] R☉ |
Temperature | 9,700[9] K |
Ab2 | |
Mass | 3.39[8] M☉ |
Radius | 1.8[9] R☉ |
Temperature | 9,700[9] K |
Ba | |
Mass | 3.17[8] M☉ |
Radius | 1.7[11] R☉ |
Luminosity | 10.1[11] L☉ |
Surface gravity (log g) | 4.28[11] cgs |
Temperature | 7,981[11] K |
Other designations | |
A: HD 169985 | |
B: HD 169985 | |
Database references | |
SIMBAD | data |
A | |
B |
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