Location of π1 Doradus on the map (circled) | |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Dorado |
Right ascension | 06h22m 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] |
Distance | 660 ± 10 ly (202 ± 3 pc) |
Absolute magnitude (MV) | −0.83[6] |
Details | |
Mass | 1.67[7] M☉ |
Radius | 56.5±2.9[8] R☉ |
Luminosity | 530±12[9] L☉ |
Surface gravity (log g) | 1.41[10] cgs |
Temperature | 4,019+3 −4[11] K |
Metallicity [Fe/H] | +0.10[10] dex |
Rotational velocity (v sin i) | 1.8±1.4[12] km/s |
Age | 2.67[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 | |
SIMBAD | data |
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 velocityof15.7 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 velocityof1.8 km/s.[12]