Gliese 521
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 29m 24.10s |
| Declination | +46° 11′ 11.37″ |
| Apparent magnitude (V) | +10.26 |
| Characteristics | |
| Spectral type | M1V |
| Astrometry | |
| Distance | 43.22 ly (13.26 pc) |
| Details | |
| Mass | 0.56 M☉ |
| Radius | 0.48 R☉ |
| Luminosity | 0.041 L☉ |
| Temperature | 3740 K |
| Other designations | |
HIP 66625, GJ 521, TYC 3463-00063-1, BD+46 1889, 2MASS J13392410+4611114 | |
| Database references | |
| SIMBAD | data |
Gliese 521 is a red dwarf star in the constellation of Canes Venatici, located roughly 43 light years from the Sun. The star is suspected to host a substellar companion yet unconfirmed.
A planetary companion?
According to Marcy & Benitz (1989)[1] detected a possible periodicity of 510 days, inferring possible presence of a massive planetary object with minimum mass of 12 times that of Jupiter in highly eccentric orbit (e=0.6). So far the planet has not been confirmed.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | ≥12 MJ | 1.038 | 510 | 0.6 | — | — |
References
- ^ a b Marcy & Benitz; Benitz, Karsten J. (1989). "A search for substellar companions to low-mass stars". Astrophysical Journal, Part 1. 344 (1): 441–453. Bibcode:1989ApJ...344..441M. doi:10.1086/167812.
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