Lambda Andromedae
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Andromeda |
| Right ascension | 23h 37m 33.8425s |
| Declination | +46° 27' 29.347"' |
| Apparent magnitude (V) | 3.82 |
| Characteristics | |
| Spectral type | G8III |
| U-B color index | 0.69 |
| B-V color index | 1.01 |
| Variable type | RS CVn type |
| Astrometry | |
| Radial velocity (Rv) | 6.8 km/s |
| Proper motion (μ) | RA: 159.22 mas/yr Dec.: -421.46 mas/yr |
| Parallax (π) | 38.74 ± 0.68 mas |
| Distance | 84 ± 1 ly (25.8 ± 0.5 pc) |
| Absolute magnitude (MV) | 4.9 |
| Details | |
| Mass | 1.1 M☉ |
| Radius | 1.1 R☉ |
| Surface gravity (log g) | ? |
| Luminosity | 1.2 L☉ |
| Temperature | 5.000–6.000 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Visual binary orbit | |
| Companion | λ Andromedae B |
| Period (P) | 0.14839 yr |
| Semimajor axis (a) | 47.5" |
| Inclination (i) | 199° |
| Visual binary orbit | |
| Companion | λ Andromedae C |
| Semimajor axis (a) | 216.5" |
| Inclination (i) | 87° |
| Visual binary orbit | |
| Companion | λ Andromedae D |
| Semimajor axis (a) | 68.5" |
| Inclination (i) | 158° |
| Other designations | |
|
2EUVE J2337+46.4, JP11 3640, ROT 3426, 16 And, EUVE J2337+46.4, LSPM J2337+4627, RX J2337.5+4627, FK5 890, LTT 16964, 1RXS J233733.3+462736, AG+46° 2169, GC 32832, 2MASS J23373382+4627298, SAO 53204, ASCC 370402, GCRV 14808, N30 5188, SBC7 963, BD+45° 4283, NLTT 57442, CABS 204, GJ 9832, PLX 5716, TD1 29974, CCABS 166, HD 222107, PMC 90-93 626, TYC 3638-2515-1, CCDM J23377+4627A, HIC 116584, PPM 64456, UBV M 27136, Ci 20 1442, HIP 116584, RAFGL 3122, UBV 21479, CSI+45° 4283 1, HR 8961, 2RE J2337+462, USNO-B1.0 1364-00512823, 2E 4740, IDS 23327+4555 A, 2RE J233733+462758, 2E 2335.1+4611, IRAS 23350+4610, RE J233733+462750, 1ES 2335+46.1, IRC +50471, RE J2337+462.
|
|
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
Lambda Andromedae (λ And / λ Andromedae) is a binary star in the constellation Andromeda. It is approximately 84.2 light years from Earth.
Lambda Andromedae is a spectroscopic binary with an orbital period of 20.52 days. It is classified as a yellow G-type giant with a mean apparent magnitude of +3.81. The binary system is an RS Canum Venaticorum variable and its brightness varies from magnitude +3.69 to +3.97 with a period of 54.2 days.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| λ Andromedae B (IDS 23327+4555 B) | 23h 37m 31.4s | +46° 27' 05 | 13.3 | Simbad | |
| λ Andromedae C (IDS 23327+4555 C) | 23h 37m 54s | +46° 28' | 10.5 | Simbad | |
| λ Andromedae D (IDS 23327+4555 D) | 23h 37m 37.1s | +46° 26' 47 | 11.5 | Simbad |
[edit] Location
This star's location in the constellation Andromeda can be seen in the following diagram:
[edit] Reference
- http://www.mfc-cs.com/space/stars/hip116584.htm
- http://www.alcyone-software.com/cgi-bin/search.pl?object=HR8961
- Image Lambda Andromedae
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