ADS 7251
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ursa Major |
ADS 7251 A | |
Right ascension | 09h 14m 22.79157s |
Declination | 52° 41′ 11.7206″ |
Apparent magnitude (V) | 7.64 |
ADS 7251 B | |
Right ascension | 09h 14m 24.69574s |
Declination | 52h 41m 11.0926s |
Apparent magnitude (V) | 7.71 |
Characteristics | |
Spectral type | M0.0 K7.0 |
Apparent magnitude (B) | 9.06 9.14 |
Apparent magnitude (V) | 7.64 7.71 |
Apparent magnitude (R) | 6.8 6.8 |
Apparent magnitude (I) | 6.0 6.0 |
Apparent magnitude (J) | 4.89 4.78 |
Apparent magnitude (H) | 3.99 4.04 |
Apparent magnitude (K) | 3.99 4.14 |
B−V color index | 1.42 1.43 |
V−R color index | 0.84 0.91 |
R−I color index | 0.8 0.8 |
J−H color index | 0.90 0.74 |
Variable type | Flare star |
Astrometry | |
ADS 7251 A | |
Radial velocity (Rv) | ±0.10 11.14 km/s |
Proper motion (μ) | RA: 555.6±0.9 −1 mas/yr Dec.: ±1 −570 mas/yr |
Parallax (π) | 161.59 ± 5.23 mas |
Distance | 20.2 ± 0.7 ly (6.2 ± 0.2 pc) |
Absolute magnitude (MV) | 8.69 |
ADS 7251 B | |
Radial velocity (Rv) | ±0.10 12.50 km/s |
Proper motion (μ) | RA: 560.8±0.8 −1 mas/yr Dec.: ±0.9 −660.6 mas/yr |
Parallax (π) | 159.48 ± 6.61 mas |
Distance | 20.5 ± 0.8 ly (6.3 ± 0.3 pc) |
Database references | |
SIMBAD | The system |
A | |
B |
ADS 7251 is a binary star system 6.16 ±0.02 parsecs (20.09 ±0.07 light years) from the Sun. Both are of nearly equal brightness, but ADS 7251 A, which is 0.06 magnitudes (1.2 times) brighter than ADS 7251 B, is a red dwarf of spectral type M0.0. The latter is spectral type K7.0 and slightly further away.
See also
References
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.