| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | 06h06m 41.03304s[1] |
| Declination | −42° 17′ 55.5846″[1] |
| Apparent magnitude (V) | 6.13[2] |
| Characteristics | |
| Spectral type | A2mA5-A9[3] |
| U−B color index | +0.11[2] |
| B−V color index | +0.25[2] |
| Astrometry | |
| Radial velocity (Rv) | 2.0±4.3[4] km/s |
| Proper motion (μ) | RA: −26.957[1] mas/yr Dec.: −5.880[1] mas/yr |
| Parallax (π) | 11.6365 ± 0.1653 mas[1] |
| Distance | 280 ± 4 ly (86 ± 1 pc) |
| Absolute magnitude (MV) | +1.55[5] |
| Details | |
| Radius | 2.49+0.15 −0.11[1] R☉ |
| Luminosity | 20.237+0.23 −0.33[1] L☉ |
| Temperature | 7,765+171 −228[1] K |
| Rotational velocity (v sin i) | 70[6] km/s |
| Other designations | |
π1 Col, CPD−42°2343, GC 7785, HD 42078, HIP 28957, HR 2171, SAO 217720[7] | |
| Database references | |
| SIMBAD | data |
Pi1 Columbae, Latinized from π1 Columbae, is a star in the southern constellationofColumba. With an apparent visual magnitude of 6.13,[2] it is a dim, white-hued star that is near the limit of visibility for the naked eye. It is located approximately 280 light years from the Sun based on parallax,[1] and has an absolute magnitude of +1.55.[5]
This is an Am star with a stellar classification of A2mA5-A9.[3] It has 2.5 times the Sun's radius and shines with 20 times the luminosity of the Sun at an effective temperature of 7,765 K.[1] The star is spinning with a projected rotational velocity of 70 km/s.[6]
{{cite web}}: CS1 maint: postscript (link)
