N Herculis

Last updated
n Herculis
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Hercules [1]
Right ascension 16h 32m 35.7s [2]
Declination +5° 31′ 16″ [2]
Apparent magnitude  (V)5.63 [3]
Characteristics
Evolutionary stage main sequence [4]
Spectral type B9.5III [5]
U−B color index −0.18 [6]
B−V color index −0.06 [6]
Astrometry
Radial velocity (Rv)−23.38±0.21 [2] km/s
Proper motion (μ)RA: +15.556 [2] mas/yr
Dec.: −0.282 [2] mas/yr
Parallax (π)8.5519±0.1394  mas [2]
Distance 381 ± 6  ly
(117 ± 2  pc)
Absolute magnitude  (MV)+0.27 [1]
Details
Mass 2.75 [7]   M☉
Radius 2.94 [7]   R☉
Luminosity 99 [7]   L☉
Surface gravity (log g)3.94 [7]   cgs
Temperature 10,623 [7]   K
Rotational velocity (v sin i)9.6 [8]  km/s
Age 237 [9]   Myr
Other designations
28 Herculis, BD+05°3223, HD 149121, HIP 81007, HR 6158, SAO 121676 [10]
Database references
SIMBAD data

n Herculis, also known as 28 Herculis, is a mercury-manganese star [11] 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. [10]

References

  1. 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.
  2. 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.
  3. ↑ 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.
  4. ↑ 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.
  5. ↑ "VizieR Detailed Page". Archived from the original on 2016-03-05. Retrieved 2012-07-13.
  6. 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.
  7. 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 .
  8. ↑ 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 .
  9. ↑ 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.
  10. 1 2 "28 Herculis". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2025-10-16.
  11. ↑ 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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