Gliese 806
Gliese 806 is a red dwarf star in the constellation of Cygnus, located roughly 41 light years from the Sun. The star is suspected to host a substellar companion yet unconfirmed.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 45m 04.10s |
| Declination | +44° 29′ 56.66″ |
| Apparent magnitude (V) | +10.84 |
| Characteristics | |
| Spectral type | M1.5V |
| Astrometry | |
| Distance | 40.75 ly (12.5 pc) |
| Details | |
| Mass | 0.48 M☉ |
| Radius | 0.44 R☉ |
| Luminosity | 0.027 L☉ |
| Temperature | 3540 K |
| Other designations | |
HIP 102401, GJ 806, TYC 3178-00633-1, 2MASS J20450403+4429562 | |
| Database references | |
| SIMBAD | data |
A planetary companion?
According to Marcy & Benitz (1989)[1] detected a possible periodicity of 416 days, inferring possible presence of a massive planetary object with minimum mass of 11 times that of Jupiter. 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) | ≥11 MJ | 0.878 | 416 | 0.2 | — | — |
gollark: Type "int" or "d/dx".
gollark: Oh, and factorial (continuous, via "gamma function" technology).
gollark: erf, statistical distributions, ln, abs, sqrt/other powers, hyperbolic functions, inverse trignometric functions, exp (e^x), sum, product, integral, derivative, mod, ceil/floor/sign/round, gcd, lcm.
gollark: You should use non-trigonometric things.
gollark: Why would it not? You can make equations arbitrarily big\*.* get more RAM
References
- 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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