5 Trianguli

5 Trianguli
Location of 5 Trianguli (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Triangulum
Right ascension 02h 11m 25.02s[1]
Declination +31° 31′ 35.02″[1]
Apparent magnitude (V) 6.23±0.01[2]
Characteristics
Spectral type A0 Vm[3]
U−B color index +0.11[4]
B−V color 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 northern constellation Triangulum. With an apparent magnitude of 6.23,[2] it’s barely visible to the naked eye under ideal conditions. The star is located 399 light years[1] away from the Solar System, but is drifting away with a radial velocity of 7.7 km/s.[5]

5 Trianguli has a classification of A0 Vm,[3] 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.[7] It has a low projected rotational velocity of 15 km/s, common for Am stars.[9]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Palmer1968 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Sato1990 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontch2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference TICv7 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).