Psi Centauri
Psi Centauri
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
Constellation | Centaurus |
Right ascension | 14h 20m 33.43s[1] |
Declination | −37° 53′ 07.1″[1] |
Apparent magnitude (V) | +4.05[2] |
| Characteristics | |
Spectral type | A0 IV[3] |
| U−B color index | −0.11[3] |
| B−V color index | −0.03[3] |
Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | −5 km/s |
| Proper motion (μ) | RA: 2998363100000000000♠−63.69±0.18[1] mas/yr Dec.: 2998893500000000000♠−10.65±0.15[1] mas/yr |
| Parallax (π) | 12.60 ± 0.20[1] mas |
| Distance | 259 ± 4 ly (79 ± 1 pc) |
| Absolute magnitude (MV) | 3000650000000000000♠−0.35±0.14[4] |
| Details | |
| ψ Cen A | |
| Mass | 3.114[5] M☉ |
| Radius | 3.634[5] R☉ |
| Luminosity | 141[5] L☉ |
| Surface gravity (log g) | 7000376000000000000♠3.76±0.04[4] cgs |
| Temperature | 10,450[5] K |
| Rotational velocity (v sin i) | 101[4] km/s |
| Age | 269[4] Myr |
| ψ Cen B | |
| Mass | 1.909[5] M☉ |
| Radius | 1.811[5] R☉ |
| Luminosity | 18[5] L☉ |
| Temperature | 8,800[5] K |
| Other designations | |
ψ Cen, CD−37° 9336, FK5 1373, GC 19337, HD 125473, HIP 70090, HR 5367, SAO 205453, CCDM J14206-3753 | |
| Database references | |
| SIMBAD | data |
Psi Centauri (ψ Cen, ψ Centauri) is a binary star[6] system in the constellation Centaurus. The primary component is a white A-type subgiant with an apparent magnitude of +4.05.[2] It is approximately 259 light years from Earth. The pair are orbiting each other with a period of 38.81 days and an eccentricity of 0.55.[6] The system displays an infrared excess at a wavelength of 60 μm, indicating the presence of a circumstellar debris disk with a temperature of 120 K, orbiting at a distance of 64 AU.[7]
References[edit]
^ abcde 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
^ ab Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
^ abc Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram, 4, Bibcode:1962MtSOM...4....1B.
^ abcd Gerbaldi, M.; et al. (June 1999), "Search for reference A0 dwarf stars: Masses and luminosities revisited with HIPPARCOS parallaxes", Astronomy and Astrophysics Supplement, 137 (2): 273–292, Bibcode:1999A&AS..137..273G, doi:10.1051/aas:1999248.
^ abcdefgh Eker, Z.; et al. (April 2015), "Main-Sequence Effective Temperatures from a Revised Mass-Luminosity Relation Based on Accurate Properties", The Astronomical Journal, 149 (4): 16, arXiv:1501.06585, Bibcode:2015AJ....149..131E, doi:10.1088/0004-6256/149/4/131, 131.
^ ab 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.
^ Rhee, Joseph H.; et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal, 660 (2): 1556–1571, arXiv:astro-ph/0609555, Bibcode:2007ApJ...660.1556R, doi:10.1086/509912.
 | This subgiant-star-related article is a stub. You can help Wikipedia by expanding it. |
Categories:
- Bayer objects
- Centaurus (constellation)
- A-type subgiants
- Hipparcos objects
- Henry Draper Catalogue objects
- HR objects
- Durchmusterung objects
- Subgiant-star stubs
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