HD 187734
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h51m26.84135s[1] |
| Declination | +04° 05′ 19.0767″[1] |
| Apparent magnitude(V) | 6.6242±0.0012[2](6.71 + 9.42)[3] |
| Characteristics | |
| Spectral type | K2III + A5V[4] |
| Astrometry | |
| Radial velocity(Rv) | −3.70±0.21[2]km/s |
| Proper motion(μ) | RA:-1.70[1]mas/yr Dec.:-5.82[1]mas/yr |
| Parallax(π) | 1.31 ± 0.86mas[1] |
| Distance | approx. 2,000ly (approx. 800pc) |
| Details | |
| HD 187734 A | |
| Mass | 8.8±0.1[5]M☉ |
| Luminosity | 3,339[6]L☉ |
| Temperature | 4,128[6]K |
| Age | 29.0±3.4Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 187734isdouble starin the equatorialconstellationofAquila.The primary is a magnitude 6.6giant star,while the companion is a magnitude 9.4A-type main sequence star.[4]As of 2014, the pair had anangular separationof 5″along a position angle of 99°.[3]
References
[edit]- ^abcdevan 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.S2CID18759600.
- ^abFamaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters",Astronomy and Astrophysics,430:165–186,arXiv:astro-ph/0409579,Bibcode:2005A&A...430..165F,doi:10.1051/0004-6361:20041272,S2CID17804304
- ^abMason, B. D.; et al. (2014),"The Washington Visual Double Star Catalog",The Astronomical Journal,122(6): 3466–3471,Bibcode:2001AJ....122.3466M,doi:10.1086/323920,retrieved2015-07-22
- ^abAbt, H. A. (September 1985), "Visual multiples. VIII. 1000 MK types",Astrophysical Journal Supplement Series,59:95–112,Bibcode:1985ApJS...59...95A,doi:10.1086/191064
- ^Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun",Monthly Notices of the Royal Astronomical Society,410(1): 190–200,arXiv:1007.4883,Bibcode:2011MNRAS.410..190T,doi:10.1111/j.1365-2966.2010.17434.x,S2CID118629873
{{citation}}:CS1 maint: unflagged free DOI (link) - ^abMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars",Monthly Notices of the Royal Astronomical Society,427(1): 343–57,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID118665352
{{citation}}:CS1 maint: unflagged free DOI (link)
External links
[edit]
 | This binary or multiple star system–related article is astub.You can help Wikipedia byexpanding it. |