HD 161056
  | |
| Observation data Epoch J2000.0[1] Equinox J2000.0[1] | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 43m 47.02216s |
| Declination | −07° 04′ 46.5943″ |
| Apparent magnitude (V) | 6.32[2] |
| Characteristics | |
| Spectral type | B1.5V, B3II/III, or B3Vn[3] |
| U−B color index | −0.42[2] |
| B−V color index | 0.36[2] |
| J−H color index | 0.072[4] |
| J−K color index | 0.101[4] |
| Astrometry | |
| Radial velocity (Rv) | −26.0±4.3[5] km/s |
| Proper motion (μ) | RA: -4.629[1] mas/yr Dec.: −10.512[1] mas/yr |
| Parallax (π) | 2.4404 ± 0.0432 mas[1] |
| Distance | 1,340 ± 20 ly (410 ± 7 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 161056 (HIP 86768, HR 6601) is a bluish-white hued star in the equatorial constellation of Ophiuchus. It has an apparent magnitude of 6.32, placing it near the limit for naked eye visibility under dark skies. The object is located approximately 1,340 light-years (410 parsecs) distant according to Gaia EDR3 parallax measurements,[1] but it is moving closer at a heliocentric radial velocity of −26.0 km/s.
In Chinese astronomy, the star was given the name Shìlóuliù (Chinese: 市樓六), meaning it was the sixth star of the asterism Shìlóu (市樓, "Municipal Office") in the Heavenly Market enclosure.[6]
Polarimetry
In 1985, the star was suggested as a standard for polarimetric observations via the Hubble Space Telescope, since the star's large distance from Earth produces a large interstellar polarization and its high luminosity makes it easily visible at such distances. In 1988, however, it was found that the star was slightly variable in polarization,[a] and thus unsuitable as a standard star.[8] Nevertheless, Hubble observed the star's ultraviolet interstellar polarization, thanks to it having been well-researched in the visible spectrum, presenting results consistent with Serkowski's law[9]—an empirical formula regarding the dependency of interstellar polarization on wavelength.[10]
See also
Notes
References
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. Bibcode:2002yCat.2237....0D.
- ^ Pantaleoni González, M; Maíz Apellániz, J; Barbá, R H; Reed, B Cameron (19 March 2021). "The Alma catalogue of OB stars – II. A cross-match with Gaia DR2 and an updated map of the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 504 (2). Oxford University Press (OUP): 2968–2982. doi:10.1093/mnras/stab688. ISSN 0035-8711. Record for this source at VizieR.
- ^ a b c "HD 161056". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 October 2024.
- ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11). Pleiades Publishing Ltd: 759–771. doi:10.1134/s1063773706110065. ISSN 1063-7737.
- ^ Yi, Shitong (April 1981). 中西对照恒星图表 [Atlas Comparing Chinese and Western Star Maps and Catalogues] (in Chinese). 科学出版社.
- ^ Bastien, P.; Vernet, E.; Drissen, L.; Menard, F.; Moffat, A. F. J.; Robert, C.; St-Louis, N. (April 2007). Sterken, C. (ed.). The variability of polarized standard stars. The Future of Photometric, Spectrophotometric and Polarimetric Standardization. ASP Conference Series. Vol. 364. Astronomical Society of the Pacific. p. 529. Bibcode:2007ASPC..364..529B.
- ^ Bastien, P.; Drissen, L.; Menard, F.; Moffat, A. F. J.; Robert, C.; St-Louis, N. (1988). "The variability of polarized standard stars". The Astronomical Journal. 95. American Astronomical Society: 900. doi:10.1086/114688. ISSN 0004-6256.
- ^ Somerville, W. B.; Allen, R. G.; Carnochan, D. J.; He, Lida; McNally, D.; Martin, P. G.; Morgan, D. H.; Nandy, K.; Walsh, J. R.; Whittet, D. C. B.; Wilson, R.; Wolff, M. J. (1994). "Ultraviolet interstellar polarization observed with the Hubble Space Telescope". The Astrophysical Journal. 427. American Astronomical Society: L47. doi:10.1086/187361. ISSN 0004-637X.
- ^ Mathis, John S. (1990). "Interstellar Dust and Extinction". Annual Review of Astronomy and Astrophysics. 28 (1). Annual Reviews: 37–70. doi:10.1146/annurev.aa.28.090190.000345. ISSN 0066-4146.
- Fan, Haoyu; Rocha, Carlos M. R.; Cordiner, Martin; Linnartz, Harold; Cox, Nick L. J.; Farhang, Amin; Smoker, Jonathan; Roueff, Evelyne; Ehrenfreund, Pascale; Salama, Farid; Foing, Bernard H.; Lallement, Rosine; MacIsaac, Heather; Kulik, Klay; Sarre, Peter; van Loon, Jacco Th.; Cami, Jan (22 December 2023). "The EDIBLES survey". Astronomy & Astrophysics. 681. EDP Sciences: A6. doi:10.1051/0004-6361/202243910. ISSN 0004-6361.
- Papoular, Renaud (12 June 2018). "A new interpretation of Serkowski's polarization law". Monthly Notices of the Royal Astronomical Society. 479 (2). Oxford University Press (OUP): 1685–1693. doi:10.1093/mnras/sty1530. ISSN 0035-8711.
- Cox, N. L. J.; Cami, J.; Kaper, L.; Ehrenfreund, P.; Foing, B. H.; Ochsendorf, B. B.; van Hooff, S. H. M.; Salama, F. (2014). "VLT/X-Shooter survey of near-infrared diffuse interstellar bands". Astronomy & Astrophysics. 569. EDP Sciences: A117. doi:10.1051/0004-6361/201323061. ISSN 0004-6361.
- Bobylev, V. V. (29 September 2008). "Open clusters IC 4665 and Cr 359 and a probable birthplace of the pulsar PSR B1929+10". Astronomy Letters. 34 (10). Pleiades Publishing Ltd: 686–698. doi:10.1134/s1063773708100046. ISSN 1063-7737.
- Peri, C. S.; Benaglia, P.; Isequilla, N. L. (2015). "E-BOSS: An Extensive stellar BOw Shock Survey". Astronomy & Astrophysics. 578. EDP Sciences: A45. doi:10.1051/0004-6361/201424676. ISSN 0004-6361.
