Q Herculis
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 11m 28.74s |
| Declination | +16° 39′ 56.5″ |
| Apparent magnitude (V) | 6.08 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A0V |
| U−B color index | 0.00 |
| B−V color index | 0.02 |
| Astrometry | |
| Proper motion (μ) | RA: +3,552 mas/yr Dec.: +4.875 mas/yr |
| Parallax (π) | 8.6995±0.0353 mas |
| Distance | 375 ± 2 ly (114.9 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.63 |
| Details | |
| Mass | 2.4 M☉ |
| Radius | 2.6 R☉ |
| Luminosity | 50 L☉ |
| Surface gravity (log g) | 4.00 cgs |
| Temperature | 9,567 K |
| Rotational velocity (v sin i) | 43 km/s |
| Age | 380 Myr |
| Other designations | |
| q Her, 48 Serpentis, BD+17 2982, HD 145647, HR 6035, SAO 101994 | |
| Database references | |
| SIMBAD | data |
q Herculis (48 Serpentis) is a star in the constellation Hercules that is situated at a distance of approximately 439.95 light-years from the Sun. Its apparent magnitude is +6.08.
The largest star q Herculis is a white star of the spectral type A0V. It has a mass of approximately 2.4 M☉, a radius of approximately 2.6 R☉, and a luminosity of approximately 50 L☉. Its effective temperature is approximately 9,567 K. The age of q Herculis is determined to be about 380 million years.
Nomenclature
q Herculis is this double star's Bayer designation. It was once considered to be in the constellation of Serpens, where it got its Flamsteed designation 48 Serpentis.
References
- 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
- 1 2 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
- 1 2 3 "VizieR Detailed Page". Archived from the original on 2016-03-04. Retrieved 2012-07-13.
- 1 2 3 4 5 6 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ↑ "q Herculis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-10-17.
- ↑ Wagman, M. (August 1987), "Flamsteed's Missing Stars", Journal for the History of Astronomy, 18 (3): 209–223, Bibcode:1987JHA....18..209W, doi:10.1177/002182868701800305, S2CID 118445625.
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