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Revision as of 15:50, 4 December 2019 by Reskin (talk | contribs) (←Created page with '{{Starbox begin | name = Yonmara }} {{Starbox image | image= 300px |caption=Location of Yonmara }} {{Starbox observe | epoch = [...')(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)| File:YonmaraAlladin.png Location of Yonmara | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19 26 26.4821 |
| Declination | −29° 44′ 35.611″ |
| Apparent magnitude (V) | +5.68 |
| Characteristics | |
| Spectral type | B8.5V |
| Astrometry | |
| Radial velocity (Rv) | −1.40 km/s |
| Proper motion (μ) | RA: +18.349 mas/yr Dec.: -50.126 mas/yr |
| Parallax (π) | 14.0013 ± 0.1325 mas |
| Distance | 233 ± 2 ly (71.4 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.47 |
| Details | |
| Mass | 1.7 M☉ |
| Radius | 1.9 R☉ |
| Other designations | |
| 186 G. Sgr, CD−29°16140, HD 182681, HIP 95619, HR 7380, SAO 188127 | |
| Database references | |
| SIMBAD | 182681 data |
Yonmara (186 G. Sagittarii) is a solitary, blue-hued star in the zodiac constellation of Sagittarius. It has an apparent visual magnitude of +5.68, which is bright enough to be faintly visible to the naked eye. According to the Bortle scale, it can be viewed from dark suburban skies. Based upon an annual parallax shift of 14.0013 mas as seen from Earth, this star is located around 225 light years from the Sun. It is advancing in the general direction of the Sun with a radial velocity of −1.40 km/s.
This is an B-type main sequence star with a stellar classification of B8.5V. The star is about 1.7 times the mass of the Sun and 1.9 times the Sun's radius.
References
- ^ van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ^ Cousins, A. W. J. (1983), "UBV photometry of E region standard stars of intermediate brightness", South African Astronomical Observatory Circular (7): 36–46, Bibcode:1983SAAOC...7...36C.
- ^ Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), The Revision of the General Catalogue of Radial Velocities, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E
{{citation}}: Unknown parameter|booktitle=ignored (help) - ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: 31, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116.
- ^ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
- ^ Patel, Rahul I.; et al. (February 2017), "The Faintest WISE Debris Disks: Enhanced Methods for Detection and Verification", The Astronomical Journal, 153 (2): 19, arXiv:1612.04818, Bibcode:2017AJ....153...54P, doi:10.3847/1538-3881/153/2/54, 54.
{{citation}}: CS1 maint: unflagged free DOI (link) - "kappa01 Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-07.
{{cite web}}: CS1 maint: postscript (link) - Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
