15h30m18.67s, −42° 58′ 41.5″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h30m 18.66718s[1] |
| Declination | −42° 58′ 41.6640″[1] |
| Apparent magnitude (V) | 17.4[2] |
| Characteristics | |
| Spectral type | K1 V[3] |
| Apparent magnitude (B) | 18.68±0.43[4] |
| Apparent magnitude (J) | 15.80±0.09[5] |
| Apparent magnitude (H) | 15.39±0.13[5] |
| Apparent magnitude (K) | 15.48±0.25[5] |
| B−V color index | +1.28[2][4] |
| Astrometry | |
| Proper motion (μ) | RA: −3.798 mas/yr[1] Dec.: −7.197 mas/yr[1] |
| Distance | ~2,000[2] pc |
| Details[2] | |
| Mass | 0.87±0.04 M☉ |
| Radius | 0.82±0.05 R☉ |
| Temperature | 5,000±150 K |
| Other designations | |
GSC2 S233113121866, USNO-B1.0 0470-00456338, DENIS-P J153018.6-425841, 2MASS J15301866-4258415[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Lupus-TR-3 is a star located in the southern constellation Lupus. It has an apparent magnitude of 17.4,[2] making it visible only in power telescopes. Its distance is not well known, but it is estimated to be roughly 2,000 parsecs away from the Solar System.[2]
Lupus-TR-3 has a stellar classification of K1 V,[3] indicating that it is an ordinary K-type main-sequence star. It has 87% the mass of the Sun and 82% the radius of the Sun. It radiates at an effective temperatureof5,000 K.[2]
Lupus-TR-3 b is an exoplanet discovered in 2007 by personnel from the Center for Astrophysics | Harvard & Smithsonian using the transit method. It has four-fifths the mass of Jupiter, nine-tenths the radius, and has density of 1.4 g/cm3. This planet is a typical "hot Jupiter" as it orbits at 0.0464 AU distance from the star, taking 3.9 days to orbit. It is currently the faintest ground-based detection of a transiting planet.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.81±0.18 MJ | 0.0464 ± 0.0007 | 3.91405±0.00004 | 0.00 | 88.3+1.3 −0.8° |
0.89±0.07 RJ |
