Optical Companion
| Observation data |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 08m 16.626s |
| Declination | +29° 05′ 45.49″ |
| Apparent magnitude | 10.8 |
| Characteristics | |
| Spectral type | G5 |
| B−V color index | 1.0 |
| Astrometry | |
| Proper motion | RA: −3.9 mas/yr Dec.: −24.0 mas/yr |
| Position (relative to A) | |
| Epoch of observation | 2000 |
| Angular distance | 89.3″ |
| Position angle | 284° |
| Other designations | |
| H 5 32B, BD+28°4B, CCDM J00083+2905B, IDS 00032+2832 B, PPM 89439, WDS 00084+2905B. | |
| Database references | |
| SIMBAD | data |
The binary system described above has an optical visual companion, discovered by William Herschel on July 21, 1781. Designated as ADS 94 B in the Aitken Double Star Catalogue, it is a G-type star with an apparent visual magnitude of approximately 10.8. Although by coincidence it appears near to the other two stars in the sky, it is not close to them in space.
Read more about this topic: Alpha Andromedae
Famous quotes containing the words optical and/or companion:
“There is an optical illusion about every person we meet.”
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—Henry David Thoreau (1817–1862)