HD 137388
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 15h 35m 40s [1] |
| Declination | −80° 12′ 17″ [1] |
| Apparent magnitude (V) | 8.70 [1] |
| Absolute magnitude (V) | 5.73 [1] |
| Distance | 128 ± 5 [1] ly (39.2 ± 1.6 [1] pc) |
| Spectral type | K2IV [1] |
| Other designations | |
HD 137388 is a class K2IV (orange subgiant) star in the constellation Apus. Its apparent magnitude is 8.70 and it is approximately 128 light years away based on parallax.[1]
It has a surface temperature of 5182 K and is 47% as luminous and 88% as massive as the Sun, with 85% of its diameter, and is thought to be around 7.4 ± 3.9 billion years old.[2]
Radial velocity studies indicate that it has a planet, b (mass 0.223 MJ, period 330d). It orbits at an average distance of 0.89 AU.[3][4]
References
- 1 2 3 4 5 6 7 8 9 SIMBAD, HD 137388 (accessed 20 September 2015)
- ↑ Bonfanti, A.; Ortolani, S.; Piotto, G.; Nascimbeni, V. (2015). "Revising the ages of planet-hosting stars". Astronomy & Astrophysics. 575 (A18): 17. arXiv:1411.4302
. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. - ↑ Dumusque, X.; Lovis, C.; Ségransan, D.; Mayor, M.; Udry, S.; Benz, W.; Bouchy, F.; Lo Curto, G.; Mordasini, C.; Pepe, F.; Queloz, D.; Santos, N. C.; Naef, D. "The HARPS Search for Southern Extra-solar Planets. XXX. Planetary Systems around Stars with Solar-like Magnetic Cycles and Short-term Activity Variation". Astronomy & Astrophysics. 535: A55–A66. arXiv:1107.1748. Bibcode:2011A&A...535A..55D. doi:10.1051/0004-6361/201117148.
- ↑ Extrasolar Planet Encyclopaedia, HD 137388B (accessed 20 September 2015)
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