| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 18h 05m 49.682s[2] |
| Declination | +21° 26′ 45.39″[2] |
| Apparent magnitude (V) | 6.94[citation needed] |
| Characteristics | |
| HD 165590A | |
| Evolutionary stage | main sequence |
| Spectral type | G1V+K6V [3] |
| HD 165590B | |
| Evolutionary stage | main sequence |
| Spectral type | G5V[3] |
| Astrometry | |
| ADS 11060AB | |
| Proper motion (μ) | RA: −3.9±0.5 mas/yr[4] Dec.: −51.4±0.7 mas/yr[4] |
| Parallax (π) | 26.51 ± 1.35 mas[5] |
| Distance | 123 ± 6 ly (38 ± 2 pc) |
| ADS 11060C | |
| Proper motion (μ) | RA: −27.515±0.014 mas/yr Dec.: −39.93±0.02 mas/yr |
| Parallax (π) | 24.6940 ± 0.0225 mas[6] |
| Distance | 132.1 ± 0.1 ly (40.50 ± 0.04 pc) |
| Details[3] | |
| HD 165590Aa | |
| Mass | 1.09±0.19 M☉ |
| Radius | 0.90 R☉ |
| Surface gravity (log g) | 4.56 cgs |
| Temperature | 5,915 K |
| Metallicity [Fe/H] | −0.13 dex |
| Age | 100 Myr |
| HD 165590Ab | |
| Mass | 0.63±0.15 M☉ |
| Radius | 0.58 R☉ |
| Surface gravity (log g) | 4.71 cgs |
| Temperature | 4,055 K |
| HD 165590B | |
| Radius | 0.91±0.09 R☉ |
| Temperature | 5,590±300 K |
| Age | 100 Myr |
| Other designations | |
ADS 11060, CSI+21 3302 1, GSC 01566-00747, HIP 88637, 2MASS J18054972+2126453, BD+21 3302, SBC9 1024, V772 Her, Gaia DR2 4576326312901654272 | |
| HD 165590A: TYC 1566-747-1, SBC9 1023, CSI+21 3302 6, ADS 11060A | |
| HD 165590B: TYC 1566-747-2, CSI+21 3302 7, ADS 11060B | |
| Database references | |
| SIMBAD | data |
HD 165590 is a quintuple system dominated by the binary Algol variable star known as V772 Herculis. The system lies in the constellation of Hercules about 123 light years from the Sun, and is suspected to be a part of the Pleiades moving group.[5]
- ^ Cite error: The named reference
MASTwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
DR2ABwas invoked but never defined (see the help page). - ^ a b c Reglero, V.; Fernandez-Figuerora, M. J.; Gimenez, A.; De Castro, E.; Fabregat, J.; Cornide, M.; Armentia, J. E. (1991). "The triple system HD 165590 : a spectroscopic and photometric study". Astronomy and Astrophysics Supplement Series. 88: 545. Bibcode:1991A&AS...88..545R.
- ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ a b Zasche, P.; Wolf, M.; Hartkopf, W. I.; Svoboda, P.; Uhlař, R.; Liakos, A.; Gazeas, K. (2009). "A Catalog of Visual Double and Multiple Stars with Eclipsing Components". The Astronomical Journal. 138 (2): 664–679. arXiv:0907.5172. Bibcode:2009AJ....138..664Z. doi:10.1088/0004-6256/138/2/664. S2CID 17089387.
- ^ Cite error: The named reference
EDR3Cwas invoked but never defined (see the help page).