TZ Arietis

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TZ Arietis
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Richt ascension 02h 00m 12.959s[1]
Declination +13° 03′ 07.01″[1]
Apparent magnitude (V) 12.298[2]
Spectral teep M4.5 V[3]
U−B colour index +1.37[4]
B−V colour index +1.80[4]
R−I colour index 1.39
Variable teep Flare star
Proper motion (μ) RA: +1092.0[1] mas/yr
Dec.: –1772.9[1] mas/yr
Parallax (π) 222 ± 5[5] mas
Distance 14.7 ± 0.3 ly
(4.5 ± 0.1 pc)
Luminosity (bolometric) 0.00135[6] L
Rotational velocity (v sin i) 3.8[6] km/s
Ither designations
TZ Ari, 2MASS J02001278+1303112, GCTP 412.02, GJ 83.1, Glicas 003-033, LHS 11.[7]

TZ Arietis is a wee reid droich o a starn in the constellation Aries. This starn is faur ower dwaum tae be seen wi the nakit ee, althou it lies relatively close tae oor Sun at a lenth o aboot 14.5 licht year. It is a bleizin starn, whilk means it's brichtness can rax awfu suddent for a whilie.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 Zacharias, N.; et al. (2003), "The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)", CDS/ADC Collection of Electronic Catalogues volume=1289, Bibcode:2003yCat.1289....0Z. 
  2. Landolt, Arlo U. (July 1992), "UBVRI photometric standard stars in the magnitude range 11.5-16.0 around the celestial equator", Astronomical Journal 104 (1): 340–371, 436–491, Bibcode:1992AJ....104..340L, doi:10.1086/116242. 
  3. Riaz, Basmah; Gizis, John E.; Harvin, James (August 2006), "Identification of New M Dwarfs in the Solar Neighborhood", The Astronomical Journal 132 (2): 866–872, arXiv:astro-ph/0606617, Bibcode:2006AJ....132..866R, doi:10.1086/505632. 
  4. 4.0 4.1 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode:1978A&AS...34....1N. 
  5. Harrington, R. S.; Dahn, C. C. (April 1980), "Summary of U.S. Naval Observatory parallaxes", Astronomical Journal 85: 454–465, Bibcode:1980AJ.....85..454H, doi:10.1086/112696. 
  6. 6.0 6.1 McLean, M.; Berger, E.; Reiners, A. (February 2012), "The Radio Activity-Rotation Relation of Ultracool Dwarfs", The Astrophysical Journal 746 (1): 23, arXiv:1108.0415, Bibcode:2012ApJ...746...23M, doi:10.1088/0004-637X/746/1/23. 
  7. "TZ Ari -- Flare Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-08-18.