AK Pictoris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pictor |
| Right ascension | 06h 38m 00.36576s |
| Declination | −61° 32′ 00.1941″ |
| Apparent magnitude (V) | 6.182 (6.32 / 8.77) |
| Characteristics | |
| Spectral type | G2 + K5: |
| B−V color index | +0.62 |
| Variable type | BY Dra |
| Astrometry | |
| Radial velocity (Rv) | 32.10 ± 0.5 km/s |
| Proper motion (μ) | RA: -47.84 mas/yr Dec.: 72.73 mas/yr |
| Parallax (π) | 46.96±0.81 mas |
| Distance | 69 ± 1 ly (21.3 ± 0.4 pc) |
| Absolute magnitude (MV) | 4.63 + ? |
| Orbit | |
| Period (P) | 217.6 yr |
| Semi-major axis (a) | 2.004″ |
| Eccentricity (e) | 0.336 |
| Inclination (i) | 93.9° |
| Longitude of the node (Ω) | 91.6° |
| Periastron epoch (T) | 2033.9 |
| Argument of periastron (ω) (secondary) | 357.3° |
| Details | |
| AK Pic A | |
| Mass | 1.03 M☉ |
| Radius | 1.22 R☉ |
| Luminosity | 1.45 L☉ |
| Temperature | 5860 K |
| Rotational velocity (v sin i) | 15.1 ± 0.8 km/s |
| AK Pic B | |
| Luminosity | 0.25 L☉ |
| Temperature | 4400 K |
| Rotational velocity (v sin i) | 15.5 ± 2.0 km/s |
| Other designations | |
| CD−61° 1428, GJ 3400, HD 48189, HIP 31711, HR 2468, SAO 249604 | |
| Database references | |
| SIMBAD | data |
AK Pictoris is a star system in the constellation Pictor. Its combined apparent magnitude is 6.182. Based on the system's parallax, it is located 69 light-years (21.3 parsecs) away. AK Pictoris is a member of the AB Doradus moving group, a group of stars with similar motions that are thought to be associated.
AK Pictoris is a binary star. Its two stars orbit each other every 217.6 years, separated by 2.004″. The primary star is a G-type star with similar properties to the Sun. The secondary star is a K-type star. The primary star is a young BY Draconis variable, a class of variable stars that derive their variability from stellar rotation. It is also known to host a debris disk, inferred from its infrared excess.