Mu Telescopii
Mu Telescopii (μ Telescopii) is a yellow-white hued star in the southern constellation of Telescopium. With an apparent visual magnitude of +6.30,[2] it is near the limit of stars that can be viewed with the naked eye. Based upon an annual parallax shift of 20.18 mas as seen from Earth,[1] it is located around 162 light years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 19h 48m 01.19882s[1] |
| Declination | −56° 21′ 45.3958″[1] |
| Apparent magnitude (V) | +6.30[2] |
| Characteristics | |
| Spectral type | F5 V[3] |
| B−V color index | +0.45[2] |
| Astrometry | |
| Radial velocity (Rv) | +8.7±0.4[4] km/s |
| Proper motion (μ) | RA: +92.25[1] mas/yr Dec.: −136.72[1] mas/yr |
| Parallax (π) | 20.18 ± 0.30[1] mas |
| Distance | 162 ± 2 ly (49.6 ± 0.7 pc) |
| Details | |
| Mass | 1.28[5] M☉ |
| Luminosity | 2.9[6] L☉ |
| Surface gravity (log g) | 4.27[3] cgs |
| Temperature | 6,542[3] K |
| Metallicity [Fe/H] | −0.07[3] dex |
| Age | 2.264[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an F-type main sequence star with a stellar classification of F5 V.[3] It is chromospherically active.[3] The star is about 2.3[5] billion years old with 1.3[5] times the mass of the Sun. It is radiating three[6] times the solar luminosity from its photosphere at an effective temperature of 6,542 K.[3]
References
- 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.
- Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- Casagrande, L.; et al. (2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530 (A138): 21, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276.
- 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.
- McDonald, 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.
- "mu. Tel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-01.
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