Pi1 Doradus

For other stars with this Bayer designation, see π Doradus.
π1 Doradus
Location of π1 Doradus on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 06h 22m 38.27576s[1]
Declination −69° 59′ 02.5605″[1]
Apparent magnitude (V) 5.54±0.01[2]
Characteristics
Spectral type K5 III[3]
U−B color index +1.82[4]
B−V color index +1.51[4]
Astrometry
Radial velocity (Rv)15.7±2.9[5] km/s
Proper motion (μ) RA: +26.170 mas/yr[1]
Dec.: +34.330 mas/yr[1]
Parallax (π)4.9606 ± 0.0769 mas[1]
Distance660 ± 10 ly
(202 ± 3 pc)
Absolute magnitude (MV)−0.83[6]
Details
Mass1.67[7] M☉
Radius56.5±2.9[8] R☉
Luminosity530±12[9] L☉
Surface gravity (log g)1.41[10] cgs
Temperature4,019+3
−4[11] K
Metallicity [Fe/H]+0.10[10] dex
Rotational velocity (v sin i)1.8±1.4[12] km/s
Age2.67[7] Gyr
Other designations
π1 Dor, 38 G. Doradus[13], CPD−69°607, GC 8310, HD 45669, HIP 30321, HR 2352, SAO 249532, TIC 167088607[14]
Database references
SIMBADdata

Pi1 Doradus, Latinized from π1 Doradus, is a solitary star[15] located in the southern constellation Dorado near the southwestern border with Mensa. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.54.[2] Gaia DR3 parallax measurements imply a distance of 660 light-years[1] and it is currently receding with a heliocentric radial velocity of 15.7 km/s.[5] At its current distance, Pi1 Doradus' brightness is diminished by 0.24 magnitudes due to interstellar extinction[16] and it has an absolute magnitude of −0.83.[6]

Pi1 Doradus has a stellar classification of K5 III,[3] indicating that it is an evolved K-type giant star. It has 1.67 times the mass of the Sun but at the age of 2.67 billion years,[7] it has expanded to 56.5 times the radius of the Sun.[8] It radiates 530 times the luminosity of the Sun[9] from its enlarged photosphere at an effective temperature 4,019 K[11] Gaia DR3 stellar evolution models give a larger radius of 63.2 R☉ and a higher luminosity of 938 L☉.[1] Pi1 Doradus is metal enriched with an iron abundance of [Fe/H] = +0.10 or 126% that of the Sun's.[10] Like many giant stars it spins slowly—having a projected rotational velocity of 1.8 km/s.[12]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Bertelli1994 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference RecioBlanco23 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).