HD 332231
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 26m 57.92s[1] |
| Declination | +33° 44′ 40.02″[1] |
| Apparent magnitude (V) | 8.56 ± 0.01[2] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | F8V[2] [2] |
| Astrometry | |
| Proper motion (μ) | RA: -36.845[2] mas/yr Dec.: -14.776[2] mas/yr |
| Parallax (π) | 12.37 ± 0.03[1] mas |
| Distance | 263.7 ± 0.6 ly (80.8 ± 0.2 pc) |
| Details | |
| Mass | 1.127 ± 0.077[1] M☉ |
| Radius | 1.277 (+0.039/−0.036)[1] R☉ |
| Surface gravity (log g) | 4.279 (+0.027/−0.034)[1] cgs |
| Temperature | 6089 (+97/−96)[1] K |
| Metallicity [Fe/H] | 0.036 (+0.059/−0.058)[1] dex |
| Age | 4.3 (+2.5/−1.9)[1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 332231 is an F-type main-sequence star that hosts at least one confirmed exoplanet, the transiting sub-Saturn HD 332231 b (also known as TOI-1456 b).[3]
Planetary system
HD 332231 b
HD 332231 b was identified as a TESS Object of Interest (TOI-1456) from TESS photometry and subsequently confirmed and characterized with radial-velocity follow-up, yielding a period of about 18.7 days and a sub-Saturn mass and radius.[3]
| Planet | Period (days) | Semi-major axis (AU) | Mass (MJ) | Radius (RJ) | Eccentricity |
|---|---|---|---|---|---|
| HD 332231 b | 18.71204 ± 0.00043 | 0.1436+0.0033 −0.0032 |
0.244 ± 0.021 | 0.867+0.027 −0.025 |
0.032+0.030 −0.022 |
Spin–orbit alignment
The projected spin–orbit angle (sky-projected obliquity, λ) has been measured via the Rossiter–McLaughlin effect by multiple groups using different high-resolution spectrographs, with results that are not fully consistent. A HARPS-N analysis found an aligned configuration (λ ≈ −2° ± 6°).[1] A separate CARMENES-based analysis reported a moderately misaligned orbit (λ ≈ −42°).[4]
Possible additional companion
Transit-timing variations have been reported as evidence that the system may contain an additional body beyond HD 332231 b.[1]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Knudstrup, E.; Albrecht, S. H. (2022). "Orbital alignment of HD 332231 b: The warm Saturn HD 332231 b/TOI-1456 b travels on a well-aligned, circular orbit around a bright F8 dwarf". Astronomy & Astrophysics. 660: A99. arXiv:2111.14968. Bibcode:2022A&A...660A..99K. doi:10.1051/0004-6361/202142726.
- ↑ 2.0 2.1 2.2 2.3 2.4 "HD 332231 — SIMBAD astronomical database". SIMBAD (CDS, Strasbourg). Retrieved 29 January 2026.
- ↑ 3.0 3.1 Dalba, P. A.; et al. (2020). "The TESS–Keck Survey. I. A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras". The Astronomical Journal. 159 (5): 241. arXiv:2003.10451. Bibcode:2020AJ....159..241D. doi:10.3847/1538-3881/ab84e3.
- ↑ Sedaghati, E.; et al. (2022). "A moderately misaligned orbit of the warm sub-Saturn HD 332231 b". Astronomy & Astrophysics. 659: A44. arXiv:2110.10282. Bibcode:2022A&A...659A..44S. doi:10.1051/0004-6361/202142471.
External links
Coordinates: 
20h 26m 57.92s, +33° 44′ 40.02″
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