Kruger 60
Location of Krüger 60 in the constellation Cepheus | |
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Cepheus |
| Krüger 60 A | |
| Right ascension | 22h 27m 59.55755s |
| Declination | +57° 41′ 42.0806″ |
| Apparent magnitude (V) | 9.93±0.03 |
| Krüger 60 B | |
| Right ascension | 22h 27m 59.79560s |
| Declination | +57° 41′ 49.7468″ |
| Apparent magnitude (V) | 10.3 – 11.4 |
| Characteristics | |
| Spectral type | M3V/M4V |
| Variable type | None/Flare star |
| Astrometry | |
| Krüger 60 A | |
| Proper motion (μ) | RA: −725.227 mas/yr Dec.: −223.461 mas/yr |
| Parallax (π) | 249.3926±0.1653 mas |
| Distance | 13.078 ± 0.009 ly (4.010 ± 0.003 pc) |
| Krüger 60 B | |
| Proper motion (μ) | RA: −934.098 mas/yr Dec.: −686.244 mas/yr |
| Parallax (π) | 249.9668 ± 0.7414 mas |
| Distance | 13.05 ± 0.04 ly (4.00 ± 0.01 pc) |
| Details | |
| Krüger 60 A | |
| Mass | 0.271±0.010 M☉ |
| Radius | 0.301±0.015 R☉ |
| Luminosity | 0.00983±0.00025 L☉ |
| Habitable zone inner limit | 0.103 AU |
| Habitable zone outer limit | 0.201 AU |
| Temperature | 3,342±111 K |
| Metallicity | –0.04 |
| Krüger 60 B | |
| Mass | 0.176±0.007 M☉ |
| Radius | 0.209±0.017 R☉ |
| Luminosity | 0.00393±0.00016 L☉ |
| Habitable zone inner limit | 0.067 AU |
| Habitable zone outer limit | 0.129 AU |
| Temperature | 3,097±111 K |
| Orbit | |
| Primary | Krüger 60 A |
| Companion | Krüger 60 B |
| Period (P) | 45.13+0.44 −0.43 yr |
| Semi-major axis (a) | 2.45±0.02″ |
| Eccentricity (e) | 0.4131+0.0031 −0.0032 |
| Inclination (i) | 165.41+0.72 −0.71° |
| Longitude of the node (Ω) | 152.6+3.3 −3.9° |
| Periastron epoch (T) | 56,944+12 −11 MJD |
| Argument of periastron (ω) (primary) | 208.2+2.8 −3.3° |
| Other designations | |
| BD+56°2783, GJ 860 A/B, HD 239960, HIP 110893, ADS 15972, G 232-075, LHS 3814/3815 | |
| Database references | |
| SIMBAD | The system |
| A | |
| B | |
Krüger 60 (DO Cephei) is a binary star system located 13.1 light-years (4.0 parsecs) from Earth, being one of nearest stars. It is made up of a pair of red dwarfs stars orbiting each other every 45 years.