HD 197037
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 39m 32.9601s[1] |
| Declination | 42° 14′ 54.7736″[1] |
| Apparent magnitude (V) | 6.813[2] |
| Characteristics | |
| HD 197037A | |
| Evolutionary stage | main-sequence star |
| Spectral type | F7V[3] |
| HD 197037B | |
| Spectral type | M[4] |
| Astrometry | |
| Radial velocity (Rv) | 9.087±0.199[5] km/s |
| Proper motion (μ) | RA: -62.745[5] mas/yr Dec.: -222.168[5] mas/yr |
| Parallax (π) | 30.2286 ± 0.0143[5] mas |
| Distance | 107.90 ± 0.05 ly (33.08 ± 0.02 pc) |
| Position (relative to HD 197037A)[6] | |
| Component | HD 197037B |
| Epoch of observation | 2013 |
| Angular distance | 3.676±0.011″ |
| Position angle | 182.21±0.18° |
| Observed separation (projected) | 121 AU |
| Details[3] | |
| HD 197037A | |
| Mass | 1.063±0.022 M☉ |
| Radius | 1.105±0.023 R☉ |
| Luminosity | 1.568±0.074 L☉ |
| Surface gravity (log g) | 4.37±0.04 cgs |
| Temperature | 6137±20[7] K |
| Metallicity [Fe/H] | −0.16±0.03 dex |
| Rotation | 19.1 d[2] |
| Age | 3.408±0.924 Gyr |
| HD 197037B | |
| Mass | 0.3412+0.0098 −0.0477[6] M☉ |
| Other designations | |
| HD 197037A: Gaia EDR3 2066437688140905600[5] | |
| HD 197037B: Gaia EDR3 2066437688141580928[8] | |
| Database references | |
| SIMBAD | data |
HD 197037 is a binary star system. Its primary, HD 197037A, is a F-type main-sequence star. Its surface temperature is 6150±34 K. HD 197037A is depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.16±0.03, but is younger at an age of 3.408±0.924 billion years.[3]
A multiplicity survey detected a red dwarf stellar companion HD 197037B in 2016, at a projected separation of 121 AU.[6] The existence of other stellar companions at projected separations from 1.62 to 45.26 AU was excluded.[3]
Planetary system[]
In 2012 one planet, named , was discovered on a wide, eccentric orbit by the radial velocity method.[9]
Another planet in the system was initially suspected, but the radial velocity signal was later attributed to the stellar companion HD 197037B.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| ≥0.79±0.05 MJ | 2.07±0.05 | 1035.7±13 | 0.22±0.07 | — | — |
References[]
- ^ a b c "HD 197037". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-19.
- ^ a b France, Kevin; Arulanantham, Nicole; Fossati, Luca; Lanza, Antonino F.; Loyd, R. O. Parke; Redfield, Seth; Schneider, P. Christian (2018), "Far-ultraviolet Activity Levels of F, G, K, and M Dwarf Exoplanet Host Stars", The Astrophysical Journal Supplement Series, 239 (1): 16, arXiv:1809.07342, Bibcode:2018ApJS..239...16F, doi:10.3847/1538-4365/aae1a3, S2CID 119368148
- ^ a b c d Wittrock, Justin M.; Kane, Stephen R.; Horch, Elliott P.; Howell, Steve B.; Ciardi, David R.; Everett, Mark E. (2017), "Exclusion of Stellar Companions to Exoplanet Host Stars", The Astronomical Journal, 154 (5): 184, arXiv:1709.05315, Bibcode:2017AJ....154..184W, doi:10.3847/1538-3881/aa8d69, S2CID 55789971
- ^ Bowler, Brendan P. (2016), "Imaging Extrasolar Giant Planets", Publications of the Astronomical Society of the Pacific, 128 (968): 102001, arXiv:1605.02731, Bibcode:2016PASP..128j2001B, doi:10.1088/1538-3873/128/968/102001, S2CID 118614968
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
- ^ a b c d Ginski, C.; Mugrauer, M.; Seeliger, M.; Buder, S.; Errmann, R.; Avenhaus, H.; Mouillet, D.; Maire, A.-L.; Raetz, S. (2016), "A lucky imaging multiplicity study of exoplanet host stars – II", Monthly Notices of the Royal Astronomical Society, 457 (2): 2173–2191, arXiv:1601.01524, doi:10.1093/mnras/stw049, S2CID 53626523
- ^ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (2017), "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes", The Astronomical Journal, 153 (3): 136, arXiv:1609.04389, Bibcode:2017AJ....153..136S, doi:10.3847/1538-3881/aa5df3, S2CID 119219062
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
- ^ a b Robertson, Paul; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wittenmyer, Robert A.; Horner, J.; Brugamyer, Erik J.; Simon, Attila E.; Barnes, Stuart I.; Caldwell, Caroline (2012), "THE McDONALD OBSERVATORY PLANET SEARCH: NEW LONG-PERIOD GIANT PLANETS AND TWO INTERACTING JUPITERS IN THE HD 155358 SYSTEM", The Astrophysical Journal, 749 (1): 39, arXiv:1202.0265, Bibcode:2012ApJ...749...39R, doi:10.1088/0004-637X/749/1/39, S2CID 59273311
Coordinates: 
20h 39m 32.9601s, +42° 14′ 54.7736″
Categories:
- Cygnus (constellation)
- Planetary transit variables
- F-type main-sequence stars
- Planetary systems with one confirmed planet
- 2MASS objects
- Durchmusterung objects
- Hipparcos objects
- Henry Draper Catalogue objects
- Binary stars
- M-type main-sequence stars