HD 64440, also known as a Puppis, is a spectroscopic binary[3] star in the constellation Puppis. Its apparent magnitude is 3.71.[2] Located around 108 parsecs (350 ly) distant,[1] the primary is a bright giant of spectral type K1.5II and the secondary is an early A-type star. They orbit with a period just under 7 years and eccentricity 0.38.[3]
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 52m 13.03173s[1] |
| Declination | −40° 34′ 32.8318″[1] |
| Apparent magnitude (V) | 3.71[2] |
| Characteristics | |
| Spectral type | K1II+A0.5[3] |
| U−B color index | +0.75[4] |
| B−V color index | +1.05[4] |
| Astrometry | |
| Radial velocity (Rv) | +24.00[5] km/s |
| Proper motion (μ) | RA: -18.00[1] mas/yr Dec.: +5.01[1] mas/yr |
| Parallax (π) | 9.25 ± 0.83 mas[1] |
| Distance | 350 ± 30 ly (108 ± 10 pc) |
| Absolute magnitude (MV) | -1.44[2] |
| Details | |
| Luminosity | 461[2] L☉ |
| Surface gravity (log g) | 1.66[6] cgs |
| Temperature | 4,601[6] K |
| Metallicity [Fe/H] | +0.02[6] dex |
| Rotational velocity (v sin i) | 2.3[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |