| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cetus |
| Right ascension | 00h 28m 34.31s[1] |
| Declination | -16° 13′ 34.8″[1] |
| Apparent magnitude (V) | 9.63 |
| Characteristics | |
| Spectral type | K4V[2] |
| Apparent magnitude (B) | ~10.77[2] |
| Apparent magnitude (J) | 7.574 ±0.019[2] |
| Apparent magnitude (H) | 7.027 ±0.033[2] |
| Apparent magnitude (K) | 6.914 ±0.024[2] |
| Astrometry | |
| Proper motion (μ) | RA: -353.78 ± 1.45[1] mas/yr Dec.: -228.96 ± 0.90[1] mas/yr |
| Parallax (π) | 28.01 ± 1.27[1] mas |
| Distance | 116 ± 5 ly (36 ± 2 pc) |
| Absolute magnitude (MV) | 6.87 |
| Details | |
| Mass | 0.74 ±0.03 M☉ |
| Radius | 0.69 R☉ |
| Luminosity | 0.21 L☉ |
| Temperature | 4714 ±93 K |
| Metallicity | -0.03 ±0.06 |
| Age | (4.3 ± 4) × 109 years |
| Other designations | |
|
G 158-84, G 266-118, 2MASS J00283433-1613343, SAO 147293,
BD-17 63, HIC 2247, NLTT 1512, UGP 4, Ci 20 33, HIP 2247, PLX 78, YZC 12 126, GEN# -0.01700063, LTT 253, PPM 208851, YZ 106 126 |
|
| Database references | |
| SIMBAD | data |
| NStED | data |
| Extrasolar Planets Encyclopaedia |
data |
BD-17°63 is an low-mass K type star in the southern constellation Cetus. It is a 9th magnitude star at a distance of about 116 light years from Earth.[1]
Contents |
In October 2008 an extrasolar planet, BD-17°63 b, was reported to be orbiting this star. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | ≥5.1 ±0.12 MJ | 1.34 ±0.02 | 655.6 ±0.6 | 0.54 ±0.005 |