HD 199442
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HD 199442 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 20h 57m 10.5773s |
| Declination | +00° 27′ 49.606″ |
| Apparent magnitude (V) | 6.065 |
| Characteristics | |
| Spectral type | K2III |
| U−B color index | 1.36 |
| B−V color index | 1.22 |
| Astrometry | |
| Radial velocity (Rv) | -25.6 km/s |
| Proper motion (μ) | RA: 11.81 mas/yr Dec.: -62.98 mas/yr |
| Parallax (π) | 10.24 ± 0.85 mas |
| Distance | 320 ± 30 ly (98 ± 8 pc) |
| Absolute magnitude (MV) | 7.292 |
| Details | |
| Mass | 0,8 M☉ |
| Radius | 0,9 R☉ |
| Luminosity | 0,4 L☉ |
| Temperature | 3,500–5,000 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Orbit | |
| Companion | HD 199442 B |
| Semi-major axis (a) | 26.2" |
| Inclination (i) | 72° |
| Orbit | |
| Companion | HD 199442 C |
| Semi-major axis (a) | 35.4" |
| Inclination (i) | 116° |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HD 199442 or IDS 20521+0005 A is a binary star situated in the Aquarius constellation. It is located about 319 light years from the solar system.
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| IDS 20521+0005 B (BD-00 4132B) | 20h 57m 12.6s | +00° 27' 36 | 11.76 | Simbad | |
| IDS 20521+0005 C (CCDM J20572+0028C) | 20h 57m 12.77s | +00° 27' 32.8 | 12.5 | Simbad |
References
External links
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