Zeta Normae

Zeta Normae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Norma
Right ascension 16h 13m 22.69800s[1]
Declination −55° 32′ 27.4108″[1]
Apparent magnitude (V) 5.81[2]
Characteristics
Spectral type F2 III[3]
B−V color index +0.34[2]
Astrometry
Radial velocity (Rv)−45.6±4.3[4] km/s
Proper motion (μ) RA: −98.850[1] mas/yr
Dec.: −42.066[1] mas/yr
Parallax (π)14.2047 ± 0.0771 mas[1]
Distance230 ± 1 ly
(70.4 ± 0.4 pc)
Absolute magnitude (MV)1.67[5]
Details
Mass1.74[6] M☉
Radius3.23+0.20
−0.06[1] R☉
Luminosity19.434±0.133[1] L☉
Surface gravity (log g)3.70[6] cgs
Temperature6,743+69
−200[1] K
Metallicity [Fe/H]−0.21[6] dex
Age1.50[6] Gyr
Other designations
ζ Nor, CD−55° 6596, HD 145361, HIP 79497, HR 6019, SAO 243449[7]
Database references
SIMBADdata

Zeta Normae, Latinised from ζ Normae, is a solitary,[3] yellow-white hued star in the southern constellation of Norma. With an apparent visual magnitude of 5.81,[2] it is a dim star near the lower limit of visibility for the naked eye. Based upon an annual parallax shift of 14.2 mas as seen from Earth,[1] this system is located approximately 230 light years from the Sun. It is advancing in the general direction of the Sun with a radial velocity of −45.6 km/s.[4]

This is an evolved F-type giant star with a stellar classification of F2 III[3] that has swollen and cooled off the main sequence after consuming the hydrogen at its core. It is an estimated 1.5 billion years old with 1.74 times the mass of the Sun[6] and 3.2 times the Sun's radius.[1] Zeta Normae is radiating approximately 19 times the Sun's luminosity from its photosphere at an effective temperature of 6,743 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).