V861 Scorpii
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 Location of V861 Scorpii | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 56m 35.98s[1] |
| Declination | −40° 49′ 24.4″[1] |
| Apparent magnitude (V) | 7.53 – 7.64 |
| Characteristics | |
| Evolutionary stage | Blue supergiant |
| Spectral type | B2Iab/b[2] |
| Variable type | EB |
| Astrometry | |
| Radial velocity (Rv) | -40.6[3] km/s |
| Proper motion (μ) | RA: -0.162 mas/yr Dec.: -1.398 mas/yr |
| Parallax (π) | 0.6577 ± 0.0217[1] mas |
| Distance | 5,000 ± 200 ly (1,520 ± 50 pc) |
| Absolute magnitude (MV) | 4.9[citation needed] |
| Details | |
| Mass | 1.0 M☉ |
| Radius | 1.2[citation needed] R☉ |
| Luminosity | 0.83 L☉ |
| Temperature | 5,584 K |
| Age | 100 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
V861 Scorpii (also known as HD 152667, or V861 Sco) is a blue supergiant star and Eclipsing binary system located in the constellation of Scorpius, within the open cluster Trumpler 24. Classified as a Beta Lyrae-type variable star, it exhibits both spectroscopic and photometric variability with an orbital period of approximately 7.848 days. Its visual magnitude ranges from 6.07 to 6.40, making it faintly visible to the naked eye under optimal conditions.[5][6][7][8]
Reference
- ↑ 1.0 1.1 1.2 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- ↑ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-10-08.
- ↑ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-10-08.
- ↑ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-10-08.
- ↑ Guide, Universe (25-01-2015T09:39:00). "V861 Scorpii Star : Distance, Colour, Size (Radius), Location and Other Facts - Universe Guide". www.universeguide.com. Retrieved 2025-10-08. Check date values in:
|date=(help) - ↑ Massey, P.; Conti, P. S. (July 1978). "V861 Scorpii". International Astronomical Union Circular (3247): 1. Bibcode:1978IAUC.3247....1M. ISSN 0081-0304.
- ↑ Polidan, R. S.; Oegerle, W. R.; Pollard, G. S. G.; Sanford, P. W.; Parmar, A. N. (1979). "1979ApJ...233L...7P Page L7". The Astrophysical Journal. 233. Bibcode:1979ApJ...233L...7P. doi:10.1086/183065. Retrieved 2025-10-08.
- ↑ Armstrong, J. T.; Johnston, M. D.; Bradt, H. V.; Cowley, A. P.; Doxsey, R. E.; Griffiths, R. E.; Hesser, J. E.; Schwartz, D. A. (1980-03-15). "Precise positions and optical search for the 38 second X-ray pulsar near OAO 1653--40 and upper limit on X-ray emission from V861 Scorpii". 236 (3): 131.
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