Phi Centauri
Phi Centauri
Jump to navigation
Jump to search
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
Constellation | Centaurus |
Right ascension | 13h 58m 16.27s[1] |
Declination | −42° 06′ 02.7″[1] |
Apparent magnitude (V) | +3.745[2] |
| Characteristics | |
Spectral type | B2 IV[3] |
| U−B color index | −0.851[4] |
| B−V color index | −0.222[4] |
| Astrometry | |
| Radial velocity (Rv) | 7000530000000000000♠+5.3±1.5[5] km/s |
| Proper motion (μ) | RA: 2998772300000000000♠−22.77±0.15[1] mas/yr Dec.: 2998798700000000000♠−20.13±0.12[1] mas/yr |
| Parallax (π) | 6.21 ± 0.17[1] mas |
| Distance | 530 ± 10 ly (161 ± 4 pc) |
| Absolute magnitude (MV) | −2.20[2] |
| Details | |
| Mass | 7000850000000000000♠8.5±0.3[3] M☉ |
| Radius | 7000419000000000000♠4.19±0.35[6] R☉ |
| Luminosity | 4,000[7] L☉ |
| Surface gravity (log g) | 7000408000000000000♠4.08±0.07[6] cgs |
| Temperature | 7004216380000000000♠21,638±388[6] K |
| Rotational velocity (v sin i) | 79[8] km/s |
| Age | 7001180000000000000♠18.0±3.2[3] Myr |
| Other designations | |
φ Cen, CD−41° 8329, GC 18874, HD 121743, HIP 68245, HR 5248, SAO 224577 | |
| Database references | |
| SIMBAD | data |
Phi Centauri, Latinized from φ Centauri, is a blue-white hued star in the southern constellation Centaurus. It is visible to the naked eye with an apparent visual magnitude of +3.7.[2] The annual parallax shift is 6.21 mas[1] as measured from Earth, which yields a distance estimate of around 530 light years. It is moving further from the Sun with a radial velocity of +5 km/s.[5]
This is a B-type subgiant star with a stellar classification of B2 IV.[3] It has no known companions, but does show radial velocity variations and higher order pulsations in the spectrum.[9] The star is just 18[3] million years old with 8.5[3] times the mass of the Sun and has 4.2[6] times the Sun's radius. It is radiating around 4,000[7] times the Sun's luminosity from its photosphere at an effective temperature of about 21,638 K.[6]
This star is a proper motion member of the Upper-Centaurus Lupus sub-group in the
Scorpius-Centaurus OB association, the nearest such co-moving association of massive stars to the Sun.[7]
References[edit]
^ abcdef 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..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}
Vizier catalog entry
^ abc 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.
^ abcdef 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.
^ ab Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168.
^ ab Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
^ abcde Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal, 129 (3): 1642–1662, arXiv:astro-ph/0412542, Bibcode:2005AJ....129.1642F, doi:10.1086/427855.
^ abc de Geus, E. J.; et al. (June 1989), "Physical parameters of stars in the Scorpio-Centaurus OB association", Astronomy and Astrophysics, 216 (1–2): 44–61, Bibcode:1989A&A...216...44D.
^ Wolff, S. C.; et al. (2007), "Rotational Velocities for B0-B3 Stars in Seven Young Clusters: Further Study of the Relationship between Rotation Speed and Density in Star-Forming Regions", The Astronomical Journal, 133 (3): 1092–1103, arXiv:astro-ph/0702133, Bibcode:2007AJ....133.1092W, doi:10.1086/511002.
^ Alecian, E.; et al. (July 2014), "Discovery of new magnetic early-B stars within the MiMeS HARPSpol survey", Astronomy & Astrophysics, 567: 19, arXiv:1404.5508, Bibcode:2014A&A...567A..28A, doi:10.1051/0004-6361/201323286, A28.
 | This subgiant-star-related article is a stub. You can help Wikipedia by expanding it. |
Categories:
- B-type subgiants
- Upper Centaurus Lupus
- Bayer objects
- Centaurus (constellation)
- Durchmusterung objects
- Hipparcos objects
- Henry Draper Catalogue objects
- HR objects
- Subgiant-star stubs
(window.RLQ=window.RLQ||).push(function(){mw.config.set({"wgPageParseReport":{"limitreport":{"cputime":"0.404","walltime":"0.490","ppvisitednodes":{"value":2049,"limit":1000000},"ppgeneratednodes":{"value":0,"limit":1500000},"postexpandincludesize":{"value":93846,"limit":2097152},"templateargumentsize":{"value":5689,"limit":2097152},"expansiondepth":{"value":14,"limit":40},"expensivefunctioncount":{"value":3,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":32091,"limit":5000000},"entityaccesscount":{"value":3,"limit":400},"timingprofile":["100.00% 385.068 1 -total"," 46.91% 180.632 1 Template:Reflist"," 38.66% 148.881 9 Template:Citation"," 16.26% 62.594 1 Template:Starbox_astrometry"," 12.04% 46.375 8 Template:Val"," 9.14% 35.192 5 Template:Navbox"," 7.96% 30.641 1 Template:Starbox_observe"," 7.00% 26.939 1 Template:Stars_of_Centaurus"," 5.83% 22.457 1 Template:Starbox_detail"," 5.14% 19.777 1 Template:DEC"]},"scribunto":{"limitreport-timeusage":{"value":"0.185","limit":"10.000"},"limitreport-memusage":{"value":7034853,"limit":52428800}},"cachereport":{"origin":"mw1331","timestamp":"20181027103126","ttl":1900800,"transientcontent":false}}});mw.config.set({"wgBackendResponseTime":116,"wgHostname":"mw1273"});});
Clash Royale CLAN TAG
