Psi Andromedae
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Andromeda |
| Right ascension | 23h 46m 02.0466s |
| Declination | +46° 25′ 12.993″ |
| Apparent magnitude (V) | 4.982 |
| Characteristics | |
| Spectral type | G5Ib+ |
| U-B color index | 0.81 |
| B-V color index | 1.11 |
| Astrometry | |
| Radial velocity (Rv) | -24.8 km/s |
| Proper motion (μ) | RA: 9.05 mas/yr Dec.: -6.25 mas/yr |
| Parallax (π) | 2.49 ± 0.92 mas |
| Distance | approx. 1300 ly (approx. 400 pc) |
| Absolute magnitude (MV) | 6.067 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Visual binary orbit | |
| Companion | ψ Andromedae a |
| Semimajor axis (a) | 0.3" |
| Inclination (i) | 102° |
| Visual binary orbit | |
| Companion | ψ Andromedae b |
| Semimajor axis (a) | 0.1" |
| Inclination (i) | 172° |
| Visual binary orbit | |
| Companion | ψ Andromedae B |
| Semimajor axis (a) | 24.8" |
| Inclination (i) | 218° |
| Visual binary orbit | |
| Companion | ψ Andromedae C |
| Semimajor axis (a) | 62" |
| Inclination (i) | 17° |
| Visual binary orbit | |
| Companion | ψ Andromedae D |
| Semimajor axis (a) | 184" |
| Inclination (i) | 152° |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
Psi Andromedae (ψ And / ψ Andromedae) is a star system in the constellation Andromeda. It is approximately 1310 light years from Earth.
The primary component, ψ Andromedae A, is a spectroscopic binary with a yellow G-type supergiant and a white A-type main sequence dwarf. It has an apparent magnitude of +4.97. It has three more distant companions, the 15th magnitude ψ Andromedae B at 25 arcseconds, the 13th magnitude ψ Andromedae C at 62 arcseconds and the 9th magnitude ψ Andromedae D at 184 arcseconds.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| ψ Andromedae B (BD+45 4321B) | 23h 46m 00.4s | +46° 24' 53 | 14.6 | Simbad | |
| ψ Andromedae C (BD+45 4321C) | 23h 46m 6s | +46° 27' 00 | 13.1 | Simbad | |
| ψ Andromedae D (BD+45 4322) | 23h 46m 10.614s | +46° 22' 28.85 | 9.32 | K0 | Simbad |
[edit] Reference
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