Gliese 521
| Observation data J2000
| |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 39m 24.10228s[1] |
| Declination | +46° 11′ 11.3631″[1] |
| Apparent magnitude (V) | +10.26[2] |
| Characteristics | |
| Spectral type | M1V[3] |
| Apparent magnitude (J) | 7.05[2] |
| Apparent magnitude (H) | 6.51[2] |
| Apparent magnitude (K) | 6.26[2] |
| Absolute magnitude (MV) | 10.243[4] |
| Details | |
Rotational velocity (v sin i) | 0.85[4] km/s |
| Database references | |
| SIMBAD | data |
Gliese 521 is a
The primary is an
rotation period of roughly 49.5 days.[6] The star has a lower metal-content compared to the Sun. It is radiating just 3%[5] of the luminosity of the Sun from its photosphere at an effective temperature of 3,493 K.[4]
A faint stellar companion was announced by E. Jódar and associates in 2013. The companion has an
Search for planets
According to Marcy & Benitz (1989)[10] detected a possible periodicity of 510 days, inferring the 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. A radial velocity study of the star during the period 2013–2017 initially found a promising signal, but this disappeared when additional data was collected and was instead attributed to magnetic activity.[11]
See also
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ S2CID 119203469.
- ^ S2CID 53135130. A128.
- ^ .
- ^ . A27.
- ^ . A89.
- ^ "BD+46 1889". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-21.
- S2CID 119462489. A8.
- .
- doi:10.1086/167812.
- )
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