5 Trianguli - Misplaced Pages

Star in the constellation Triangulum.

5 Trianguli
Observation data Epoch J2000 Equinox J2000
Location of 5 Trianguli (circled)
Constellation	Triangulum
Right ascension	02 11 25.02
Declination	+31° 31′ 35.02″
Apparent magnitude (V)	6.23±0.01
Characteristics
Spectral type	A0 Vm
U−B color index	+0.11
B−V color index	+0.12
Astrometry

Radial velocity (R_v)	7.7±1.5 km/s
Proper motion (μ)	RA: +35.429 mas/yr Dec.: −10.785 mas/yr
Parallax (π)	8.1779 ± 0.0862 mas
Distance	399 ± 4 ly (122 ± 1 pc)
Absolute magnitude (M_V)	+1.07

Details

Mass	2.22±0.41 `M`_☉
Radius	2.96±0.36 `R`_☉
Luminosity	48.2±1.2 `L`_☉
Surface gravity (log g)	3.84±0.31 cgs
Temperature	8,836 K
Metallicity	−0.17 dex
Rotational velocity (v sin i)	15±10 km/s

Other designations
5 Trianguli, BD+30 347, HD 13372, HIP 10220, HR 634, SAO 55338
Database references
SIMBAD	data

5 Trianguli is a solitary star located in the northern constellation Triangulum. With an apparent magnitude of 6.23, it’s barely visible to the naked eye under ideal conditions. The star is located 399 light years away from the Solar System, but is drifting away with a radial velocity of 7.7 km/s.

5 Trianguli has a classification of A0 Vm, which states it’s an A-type main-sequence star with unusually strong metallic lines. It has 2.22 times the mass of the Sun and 2.96 times the radius of the Sun. 5 Trianguli radiates at 48 solar luminosities from its photosphere at an effective temperature of 8,836 kelvin, which gives it a white-hue of an A-type star. It has a low projected rotational velocity of 15 km/s, common for Am stars.

References

^ 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.
^ 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.
^ Palmer, 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.
^ Sato, 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.
^ 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.
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.
^ Stassun, 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.
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.
^ Abt, 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.

Constellation of Triangulum

Stars

Bayer	α (Mothallah) β γ δ ε ι
Flamsteed	1 5 7 10 11 12 13 14 15
Variable	R V X RW XX
HR	490 523 564
HD	9446 13189
Other	B324 HAT-P-38 (Horna) LSPM J0207+3331 M33-013406.63 M33 X-7 Romano's Star Ross 19 Var 83

Exoplanets	HAT-P-38b (Hiisi) HD 9446 b c HD 13189 b

Nebulae	588 595 604

Galaxies

NGC	Triangulum Galaxy 608 634 669 670 672 684 688 735 736 739 740 750 751 769 777 784 804 805 819 855 860 861 890 925 931 940 941 953 959 970 973 1060
Numbered	I II
Other	Arp 166 RD1