HD 148156
HD 148156 is an 8th magnitude G-type main sequence star located approximately 168 light years away in the constellation Norma. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content almost twice as much as the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 28m 17.284s[1] |
| Declination | –46° 19′ 03.46″[1] |
| Apparent magnitude (V) | 7.71 |
| Characteristics | |
| Spectral type | G1V |
| Apparent magnitude (B) | 8.22 |
| Apparent magnitude (J) | 6.688 |
| Apparent magnitude (H) | 6.489 |
| Apparent magnitude (K) | 6.397 |
| B−V color index | 0.51 |
| Astrometry | |
| Radial velocity (Rv) | –2.0 km/s |
| Proper motion (μ) | RA: 44.88±0.94[1] mas/yr Dec.: 28.10±0.74[1] mas/yr |
| Parallax (π) | 19.38 ± 0.75[1] mas |
| Distance | 168 ± 7 ly (52 ± 2 pc) |
| Absolute magnitude (MV) | 4.09 |
| Details | |
| Mass | 1.15 M☉ |
| Radius | 1.28±0.12 R☉ |
| Luminosity | 1.902±0.235 L☉ |
| Surface gravity (log g) | 4.31 cgs |
| Temperature | 6010±100 K |
| Metallicity | 0.29 |
| Other designations | |
CD–46°10768, HIP 80680, PPM 321761, SAO 226791 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 49 to 345 astronomical units.[2]
Planetary system
In 2009, a gas giant planet was found in orbit around the star.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 0.85+0.67 −0.05 MJ |
2.45+0.04 −0.05 |
1027±28 | 0.52+0.04 −0.09 |
— | — |
gollark: I mean, yes, but if you don't assume those you can't really... do anything?
gollark: Explaining is hard even if you do know things, sometimes.
gollark: I think I remember his name from something.
gollark: To the IQ test? I think I still have it around. I was trying to move it from Microsoft Forms to my broken JS-based quiz thing.
gollark: I'm very intelligent. I made my own IQ test and it said I had an IQ of 600.
See also
- List of extrasolar planets
References
- van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3). doi:10.1093/mnras/stv771. Retrieved 19 June 2020.
- Naef, D.; et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics. 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616.
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