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5 Trianguli

From Wikipedia, the free encyclopedia
Star in the constellation Triangulum.
5 Trianguli
Location of 5 Trianguli (circled)
Observation data
Epoch J2000      Equinox J2000
ConstellationTriangulum
Right ascension02h 11m 25.02s[1]
Declination+31° 31′ 35.02″[1]
Apparent magnitude (V)6.23±0.01[2]
Characteristics
Spectral typeA0 Vm[3]
U−Bcolor index+0.11[4]
B−Vcolor index+0.12[4]
Astrometry
Radial velocity (Rv)7.7±1.5[5] km/s
Proper motion (μ)RA: +35.429[1]mas/yr
Dec.: −10.785[1]mas/yr
Parallax (π)8.1779±0.0862 mas[1]
Distance399 ± 4 ly
(122 ± 1 pc)
Absolute magnitude (MV)+1.07[6]
Details[7]
Mass2.22±0.41 M☉
Radius2.96±0.36 R☉
Luminosity48.2±1.2 L☉
Surface gravity (log g)3.84±0.31 cgs
Temperature8,836 K
Metallicity [Fe/H]−0.17[8] dex
Rotational velocity (v sin i)15±10[9] km/s
Other designations
5 Trianguli,BD+30 347,HD 13372,HIP 10220,HR 634,SAO 55338
Database references
SIMBADdata

5 Trianguli is a solitary star located in the northernconstellationTriangulum. With anapparent magnitude of 6.23,[2] it’s barely visible to thenaked eye under ideal conditions. The star is located 399light years[1] away from theSolar System, but is drifting away with aradial velocity of 7.7 km/s.[5]

5 Trianguli has a classification of A0 Vm,[3] which states it’s anA-type main-sequence star with unusually strongmetallic lines. It has 2.22 times themass of the Sun and 2.96 times theradius of the Sun. 5 Trianguli radiates at 48solar luminosities from itsphotosphere at aneffective temperature of 8,836kelvin, which gives it a white-hue of anA-type star.[7] It has a lowprojected rotational velocity of 15 km/s, common forAm stars.[9]

References

[edit]
  1. ^abcdefBrown, 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 atVizieR.
  2. ^abHøg, 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. ^abPalmer, D. R.; Walker, E. N.; Jones, D. H. P.; Wallis, R. E. (1968). "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars".Royal Greenwich Observatory Bulletins.135: 385.Bibcode:1968RGOB..135..385P.
  4. ^abSato, K.; Kuji, S. (November 1990). "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington".Astronomy and Astrophysics Supplement Series.85: 1069.Bibcode:1990A&AS...85.1069S.ISSN 0365-0138.
  5. ^abGontcharov, 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 255204555.
  7. ^abStassun, Keivan G.; et al. (September 2018)."The TESS Input Catalog and Candidate Target List".The Astronomical Journal.156 (3): 102.arXiv:1706.00495.Bibcode:2018AJ....156..102S.doi:10.3847/1538-3881/aad050.ISSN 0004-6256.
  8. ^Anders, F.; et al. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18".Astronomy and Astrophysics.628: A94.arXiv:1904.11302.Bibcode:2019A&A...628A..94A.doi:10.1051/0004-6361/201935765.ISSN 0004-6361.S2CID 131780028.
  9. ^abAbt, Helmut A.; Morrell, Nidia I. (July 1995)."The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars".The Astrophysical Journal Supplement Series.99: 135.Bibcode:1995ApJS...99..135A.doi:10.1086/192182.ISSN 0067-0049.
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