N Herculis
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 32m 35.7s |
| Declination | +5° 31′ 16″ |
| Apparent magnitude (V) | 5.63 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | B9.5III |
| U−B color index | −0.18 |
| B−V color index | −0.06 |
| Astrometry | |
| Radial velocity (Rv) | −23.38±0.21 km/s |
| Proper motion (μ) | RA: +15.556 mas/yr Dec.: −0.282 mas/yr |
| Parallax (π) | 8.5519±0.1394 mas |
| Distance | 381 ± 6 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | +0.27 |
| Details | |
| Mass | 2.75 M☉ |
| Radius | 2.94 R☉ |
| Luminosity | 99 L☉ |
| Surface gravity (log g) | 3.94 cgs |
| Temperature | 10,623 K |
| Rotational velocity (v sin i) | 9.6 km/s |
| Age | 237 Myr |
| Other designations | |
| 28 Herculis, BD+05°3223, HD 149121, HIP 81007, HR 6158, SAO 121676 | |
| Database references | |
| SIMBAD | data |
n Herculis, also known as 28 Herculis, is a mercury-manganese star in the constellation Hercules at a distance of approximately 381 light-years (about 117 parsecs) from the Sun. The apparent magnitude of the star is +5.6. Once in the constellation Ophiuchus, it was also catalogued as 11 Ophiuchi.
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 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.
- ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Stellar Photometry in Johnson's 11-color system (Ducati, 2002)". Vizier Online Data Catalog. Bibcode:2002yCat.2237....0D.
- ↑ Takeda, Yoichi; Takada-Hidai, Masahide; Jugaku, Jun; Sakaue, Akihiko; Sadakane, Kozo (1999). "Oxygen 6156-8 Angstroms Triplet in Chemically Peculiar Stars of the Upper Main Sequence: Do HGMN Stars Show an Oxygen Anomaly?". Publications of the Astronomical Society of Japan. 51: 961. Bibcode:1999PASJ...51..961T. doi:10.1093/pasj/51.6.961.
- ↑ "VizieR Detailed Page". Archived from the original on 2016-03-05. Retrieved 2012-07-13.
- 1 2 Hamdy, M. A.; Abo Elazm, M. S.; Saad, S. M. (1993). "A Catalogue of Spectral Classification and Photometric Data of B-Type Stars". Astrophysics and Space Science. 203 (1): 53. Bibcode:1993Ap&SS.203...53H. doi:10.1007/BF00659414.
- 1 2 3 4 5 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.
- ↑ Takeda, Yoichi; Han, Inwoo; Kang, Dong-Il; Lee, Byeong-Cheol; Kim, Kang-Min (2019). "Compositional differences between the component stars of eclipsing close binary systems showing chemical peculiarities". Monthly Notices of the Royal Astronomical Society. 485 (1): 1067. arXiv:1902.04766. Bibcode:2019MNRAS.485.1067T. doi:10.1093/mnras/stz449.
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031.
- 1 2 "28 Herculis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-10-16.
- ↑ Ghazaryan, S.; Alecian, G. (2016). "Statistical analysis from recent abundance determinations in HGMN stars". Monthly Notices of the Royal Astronomical Society. 460 (2): 1912. Bibcode:2016MNRAS.460.1912G. doi:10.1093/mnras/stw911.
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