Mu Telescopii

Mu Telescopii, Latinized from μ Telescopii is a solitary star in the southern constellation Telescopium. It has an apparent visual magnitude of 6.28,[2] placing it near the limit of naked eye visibility. The object is relatively close at a distance of 118 light years[1] but is receding with a heliocentric radial velocity of 8.6 km/s.[5]

μ Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 30m 34.6118s[1]
Declination −55° 06′ 36.1901″[1]
Apparent magnitude (V) 6.28±0.01[2]
Characteristics
Spectral type F5 V[3]
B−V color index +0.45[4]
Astrometry
Radial velocity (Rv)8.6±0.3[5] km/s
Proper motion (μ) RA: +38.548 mas/yr[1]
Dec.: −11.540 mas/yr[1]
Parallax (π)27.6727 ± 0.0284 mas[1]
Distance117.9 ± 0.1 ly
(36.14 ± 0.04 pc)
Absolute magnitude (MV)+3.61[6]
Details
Mass1.28[7] M☉
Radius1.40+0.07
−0.05[8] R☉
Luminosity3.22±0.01[9] L☉
Surface gravity (log g)4.3±0.1[8] cgs
Temperature6,570±136[10] K
Metallicity [Fe/H]−0.06[11] dex
Rotational velocity (v sin i)6.9±0.5[12] km/s
Age2.12[11] Gyr
Other designations
μ Tel, 61 G. Telescopii, CPD−55° 8188, HD 183028, HIP 95932, HR 7393, SAO 246131[13][14]
Database references
SIMBADdata

Mu Telescopii has a stellar classification of F5 V,[3] indicating that it is an ordinary F-type main sequence star. It has been noted to be chromospherically active.[3] The star is 2.12 billion years[11] old with a current mass of 1.28 M☉,[7] and has a diameter 1.4 times that of the Sun It is radiating 3.22 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 6,570 K,[10] giving a yellow white hue. Mu Telescopii is slightly metal deficient with an iron abundance 87% that of the Sun[11] and spins with a projected rotational velocity of 6.9 km/s.[12]

It has been observed for infrared excess suggesting the presence of a debris disk but so far, none has been found.[15]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  4. Stoy, R. H. (October 1968). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 27: 119. Bibcode:1968MNSSA..27..119S. ISSN 0024-8266.
  5. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  6. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  7. David, Trevor J.; Hillenbrand, Lynne A. (12 May 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. ISSN 1538-4357.
  8. Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
  9. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  10. Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 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. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. ISSN 0004-6361.
  11. Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108. S2CID 255201789.
  12. Groot, P. J.; Piters, A. J. M.; van Paradijs, J. (September 1996). "Rotational velocities of F dwarfs; application of the Fourier-Bessel transformation method". Astronomy and Astrophysics Supplement Series. 118 (3): 545–555. Bibcode:1996A&AS..118..545G. doi:10.1051/aas:1996214. ISSN 0365-0138.
  13. "mu. Tel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-01.{{cite web}}: CS1 maint: postscript (link)
  14. Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  15. Gáspár, András; Rieke, George H.; Ballering, Nicholas (29 July 2016). "The Correlation Between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. eISSN 1538-4357.
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