Iota2 Cygni
Iota2 Cygni
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
Constellation | Cygnus |
Right ascension | 19h 29m 42.36s[1] |
Declination | +51° 43′ 47.2″[1] |
Apparent magnitude (V) | 3.77[2] |
| Characteristics | |
Spectral type | A5V[3] |
| B−V color index | +0.15[2] |
| Astrometry | |
| Radial velocity (Rv) | −19.50[4] km/s |
| Proper motion (μ) | RA: +20.59[2] mas/yr Dec.: +128.33[2] mas/yr |
| Parallax (π) | 26.88 ± 0.11[1] mas |
| Distance | 121.3 ± 0.5 ly (37.2 ± 0.2 pc) |
| Absolute magnitude (MV) | +0.91[5] |
| Details | |
| Mass | 1.80[6] M☉ |
| Radius | 1.90 [7] R☉ |
| Luminosity | 38[8] L☉ |
| Surface gravity (log g) | 3.91[6] cgs |
| Temperature | 7003821600000000000♠8,216±279[6] K |
| Age | 577[6] Myr |
| Other designations | |
10 Cygni, BD+51° 2605, GC 26947, HIP 95853, HR 7420, HD 184006, SAO 31702 [2] | |
| Database references | |
| SIMBAD | data |
Iota2 Cygni (Latinized from ι2 Cygni, often simply called ι Cygni[9]) is a star in the constellation Cygnus. Its apparent magnitude is 3.77[2] Located around 37.20 parsecs (121.3 ly) distant,[1] it is a blue-white main-sequence star of spectral type A5V,[3] a star that is currently fusing its core hydrogen. Based on rapid changes in the strength of a singly-ionized calcium absorption line, the star is likely host to a circumstellar disk.[10]
References[edit]
^ abcd van Leeuwen, F. (November 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..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ abcdef "Iota Cygni". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 24 July 2015.
^ ab Chesneau, O.; et al. (2010). "Time, spatial, and spectral resolution of the Hα line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer". Astronomy and Astrophysics. 521: A5. arXiv:1007.2095. Bibcode:2010A&A...521A...5C. doi:10.1051/0004-6361/201014509.
^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W, LCCN 54001336
^ 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.
^ abcd David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451
Vizier catalog entry
^ 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.
^ Kaler, Jim. "Kappa, Iota Cygni". Retrieved 2016-05-19.
^ Montgomery, Sharon L.; Welsh, Barry Y. (October 2012). "Detection of Variable Gaseous Absorption Features in the Debris Disks Around Young A-type Stars". Publications of the Astronomical Society of the Pacific. 124 (920): 1042–1056. Bibcode:2012PASP..124.1042M. doi:10.1086/668293.
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
Categories:
- Cygnus (constellation)
- A-type main-sequence stars
- Bayer objects
- Hipparcos objects
- HR objects
- Henry Draper Catalogue objects
- Flamsteed objects
- Durchmusterung objects
- Main-sequence-star stubs
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