| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 05m 43.7s |
| Declination | +32° 26' 42" |
| Apparent magnitude (V) | 11.7 / 12.1 |
| Characteristics | |
| Spectral type | M3 / M5 |
| Astrometry | |
| Radial velocity (Rv) | -31 km/s |
| Proper motion (μ) | RA: 1221 mas/yr Dec.: 1101 mas/yr |
| Parallax (π) | 123 ± 4 mas |
| Distance | 26.5 ± 0.9 ly (8.1 ± 0.3 pc) |
| Absolute magnitude (MV) | 12.0 / ? |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Surface gravity (log g) | ? |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Orbit | |
| Companion | Gliese 747 B |
| Period (P) | 5 yr |
| Semimajor axis (a) | 0.65" |
| Other designations | |
|
LHS 471, CSI+32 3326 2, LP 336-6, USNO-B1.0 1225-00412171, 17 Lyr C, GCRV 11590, LSPM J1907+3232, USNO 351, KUI 90A, G 207-16, LTT 15603, Zkh 286, AC +33 57637-0, GJ 4103, 2MASS J19074283+3232396, AC +32 54804-0, GJ 747 A, NLTT 47437, ADS 12061 C, LFT 1451, PLX 4459, Ci 20 1130, L 1499-28, UCAC2 43304362. GJ 747 B, ADS 12061 P, Zkh 287, KUI 90B, CSI+32 3326 5.
|
|
| Database references | |
| SIMBAD | data |
Gliese 747AB is a red dwarf star located in Lyra near 17 Lyrae (19h 05m 43.7s +32° 26' 42"). Also named 17 Lyrae C or Kuiper 90, it is a binary system with a period of 5 years, and a small angular separation (0.35").
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| Gliese 747 B | 01h 09m 42.2s | +32° 32' 54 | 12.1 | M5 | Simbad |