 | This article needs additional citations for verification. (October 2019) |
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Cepheus |
| Krüger 60 A | |
| Right ascension | 22h 27m 59.55755s[2] |
| Declination | +57° 41′ 42.0806″[2] |
| Apparent magnitude (V) | 9.59[citation needed] |
| Krüger 60 B | |
| Right ascension | 22h 27m 59.79560s[3] |
| Declination | +57° 41′ 49.7468″[3] |
| Apparent magnitude (V) | 11.40[citation needed] |
| Characteristics | |
| Spectral type | M3V/M4V[4] |
| U−B color index | 1.27/1.3[citation needed] |
| B−V color index | 1.65/1.8[citation needed] |
| Variable type | None/Flare star |
| Astrometry | |
| Krüger 60 A | |
| Radial velocity (Rv) | –33.1[citation needed] km/s |
| Proper motion (μ) | RA: −725.227±0.537[2] mas/yr Dec.: −223.461±0.348[2] mas/yr |
| Parallax (π) | 249.3926 ± 0.1653 mas[2] |
| Distance | 13.078 ± 0.009 ly (4.010 ± 0.003 pc) |
| Absolute magnitude (MV) | 11.76 |
| Krüger 60 B | |
| Radial velocity (Rv) | –31.9[citation needed] km/s |
| Proper motion (μ) | RA: −934.098±1.319[3] mas/yr Dec.: −686.244±1.410[3] mas/yr |
| Parallax (π) | 249.9668 ± 0.7414 mas[3] |
| Distance | 13.05 ± 0.04 ly (4.00 ± 0.01 pc) |
| Absolute magnitude (MV) | 13.46 |
| Details | |
| Krüger 60 A | |
| Mass | 0.271[5] M☉ |
| Radius | 0.35[6] R☉ |
| Luminosity | 0.010[citation needed] L☉ |
| Temperature | 3,180[citation needed] K |
| Metallicity | –0.04[7] |
| Krüger 60 B | |
| Mass | 0.176[5] M☉ |
| Radius | 0.24[6] R☉ |
| Luminosity | 0.0034[citation needed] L☉ |
| Temperature | 2,890[citation needed] K |
| Orbit[8] | |
| Primary | Krüger 60 A |
| Companion | Krüger 60 B |
| Period (P) | 44.67 yr |
| Semi-major axis (a) | 2.383″ |
| Eccentricity (e) | 0.410 |
| Inclination (i) | 167.2° |
| Longitude of the node (Ω) | 154.5° |
| Periastron epoch (T) | 1970.22 |
| Argument of periastron (ω) (primary) | 211.0° |
| Other designations | |
| Database references | |
| SIMBAD | The system |
| A | |
| B | |
  Krüger 60 Location of Krüger 60 in the constellation Cepheus | |
Krüger 60 (DO Cephei) is a binary star system located 13.1 light-years (4.0 parsecs) from the Sun. These red dwarf stars orbit each other every 44.6 years.
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aaa367was invoked but never defined (see the help page). - ^ Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Santos, Nuno C.; Forveille, Thierry; Ségransan, Damien (2005). "Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence". Astronomy and Astrophysics. 442 (2): 635–642. arXiv:astro-ph/0503260. Bibcode:2005A&A...442..635B. doi:10.1051/0004-6361:20053046. S2CID 13900901. Only listed for component A.
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