HD 166
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Andromeda |
| Right ascension | 0h 6m 36.7839s |
| Declination | +29° 1' 17.406" |
| Apparent magnitude (V) | 6.13 |
| Characteristics | |
| Spectral type | K0Ve |
| U-B color index | +0.33 |
| B-V color index | +0.75 |
| Astrometry | |
| Radial velocity (Rv) | -8.2 km/s |
| Proper motion (μ) | RA: 379.94 mas/yr Dec.: -178.35 mas/yr |
| Parallax (π) | 72.98 ± 0.75 mas |
| Distance | 44.7 ± 0.5 ly (13.7 ± 0.1 pc) |
| Other designations | |
HD 166 is a 6th magnitude star in the constellation Andromeda, approximately 45 light years away from Earth. It is a variable star of the BY Draconis type, with a variation in brightness smaller than 0.2 magnitude. It is an orange star of the spectral type K0V, meaning it has a surface temperature of 3,500 to 5,000 kelvin and is a dwarf star like our Sun, yet cooler and dimmer.[1] It is within one degree of the star Alpha Andromedae.[2]
[edit] References
- ^ a b Simbad Query Result. Simbad. Retrieved on October 12, 2007.
- ^ Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.
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