HD 197037

Short description: Binary star system in the constellation of Cygnus

HD 197037  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Cygnus
Right ascension |  20h 39m 32.9601s[1]
Declination | 42° 14′ 54.7736″[1]
Apparent magnitude (V) | 6.813[2]
Characteristics
HD 197037 A
Evolutionary stage | main-sequence star
Spectral type | F7V[3]
HD 197037 B
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 197037 A)[6]
Component| HD 197037 B
Epoch of observation| 2013
Angular distance| 3.676±0.011″
Position angle| 182.21±0.18°
Observed separation
(projected)| 121 AU
Details[3]
HD 197037 A
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 197037 B
Mass| 0.3412+0.0098−0.0477[6] M☉
Other designations

BD+41 3845, HIP 101948, LTT 16037, NLTT 49662, TYC 3161-126-1, 2MASS J20393296+4214549[1]

HD 197037 A: Gaia EDR3 2066437688140905600[5]
HD 197037 B: Gaia EDR3 2066437688141580928[8]
Database references
SIMBAD| data

HD 197037 is a binary star system. Its primary or visible star, HD 197037 A, is a F-type main-sequence star. Its surface temperature is 6150±34 K. HD 197037 A 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 197037 B 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 HD 197037 Ab, 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 197037 B.[6]

The HD 197037 A planetary system[9] Companion
(in order from star) | Mass | Semimajor axis
(AU) | Orbital period
(days) | Eccentricity | Inclination | Radius

|
|
|
|
|
|

b | ≥0.79±0.05 MJ | 2.07±0.05  | 1035.7±13  | 0.22±0.07  | —  | —

## References

1. ↑ 1.0 1.1 1.2 "HD 197037". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+197037.
2. ↑ 2.0 2.1 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, doi:10.3847/1538-4365/aae1a3, Bibcode: 2018ApJS..239...16F
3. ↑ 3.0 3.1 3.2 3.3 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, doi:10.3847/1538-3881/aa8d69, Bibcode: 2017AJ....154..184W
4. ↑ Bowler, Brendan P. (2016), "Imaging Extrasolar Giant Planets", Publications of the Astronomical Society of the Pacific 128 (968): 102001, doi:10.1088/1538-3873/128/968/102001, Bibcode: 2016PASP..128j2001B
5. ↑ 5.0 5.1 5.2 5.3 5.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
6. ↑ 6.0 6.1 6.2 6.3 Ginski, C.; Mugrauer, M.; Seeliger, M.; Buder, S.; Errmann, R.; Avenhaus, H.; Mouillet, D.; Maire, A.-L. et al. (2016), "A lucky imaging multiplicity study of exoplanet host stars – II", Monthly Notices of the Royal Astronomical Society 457 (2): 2173–2191, doi:10.1093/mnras/stw049, Bibcode: 2016MNRAS.457.2173G
7. ↑ 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, doi:10.3847/1538-3881/aa5df3, Bibcode: 2017AJ....153..136S
8. ↑ Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
9. ↑ 9.0 9.1 Robertson, Paul; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wittenmyer, Robert A.; Horner, J.; Brugamyer, Erik J.; Simon, Attila E. et al. (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, doi:10.1088/0004-637X/749/1/39, Bibcode: 2012ApJ...749...39R

Coordinates:  20h 39m 32.9601s, +42° 14′ 54.7736″

* v
* t
* e

Constellation of Cygnus

* List of stars in Cygnus

Stars|

| Bayer|

* α (Deneb)
* β (Albireo)
* γ (Sadr)
* δ (Fawaris)
* ε (Aljanah)
* ζ
* η
* θ
* ι1
* ι2
* κ
* λ
* μ
* ν
* ξ
* π1 (Azelfafage)
* π2
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ
* ω1
* ω2
* P
* Q

|

Flamsteed|

* 2
* 4
* 8
* 9
* 14
* 15
* 16 (c)
* 17
* 20 (d)
* 22
* 23
* 26 (e)
* 27 (b1)
* 28 (b2)
* 29 (b3)
* 30
* 31
* 32
* 33
* 35
* 39
* 41
* 47
* 52
* 55
* 56
* 57
* 59 (f1)
* 61
* 63 (f2)
* 68 (A)
* 71 (g)
* 72
* 74
* 75

Variable|

* R
* T
* W
* RW
* SS
* TT
* BC
* BI
* CH
* KY
* V404
* V476
* V1057
* V1143
* V1191
* V1489
* V1500
* V1668
* V1974
* V2513

HR|

* 7633
* 7912
* 8193

HD|

* 185269
* 185435
* 187123
* 188753
* 191806

Gliese|

* 777
* 806
* 1245

Kepler|

* 5
* 6
* 11
* 15
* 16
* 17
* 18
* 22
* 23
* 27
* 28
* 29
* 31
* 32
* 33
* 34
* 35
* 36
* 39
* 40
* 41
* 42
* 43
* 44
* 45
* 47
* 51
* 56
* 61
* 66
* 67
* 68
* 69
* 70
* 78
* 80
* 84
* 86
* 89
* 107
* 182
* 186
* 223
* 371
* 419
* 432
* 451
* 452
* 1229
* 1520
* 1625

Other|

* AFGL 2591
* BD+40° 4210
* BD+43 3654
* Cygnus OB2 #8A
* Cygnus OB2 #12
* Cygnus X-1
* Cygnus X-3
* G 208-44
* G 208-45
* HAT-P-7
* HAT-P-11
* HAT-P-17
* KELT-9
* KIC 8462852
* KIC 9832227
* KIC 11026764
* KOI-74
* KOI-81
* KOI-256
* KPD 1930+2752
* MWC 349
* N6946-BH1
* NML Cygni
* PH1
* PSR J2032+4127
* W75N(B)-VLA2
* WISE J2000+3629
* WR 134
* WR 135
* WR 136
* WR 137
* WR 140
* WR 142
* WR 147
* WR 148

Former|

* 3

Star
clusters|

| Association|

* Cygnus OB2
* Cygnus OB7

|

Open|

* DR 6
* IC 5146
* Messier 29
* Messier 39
* NGC 6811
* NGC 6819
* NGC 6834
* NGC 6866
* NGC 6871
* NGC 6910

Molecular
clouds|

* Cygnus X (including DR 21)

Nebulae|

| Dark|

* Barnard 146
* Barnard 147
* IC 5146
* L1014

|

H II|

* NGC 6914
* North America Nebula
* Pelican Nebula
* Sadr Region
* Sh2-101
* Sh2-106

Planetary|

* Abell 78
* Egg Nebula
* IRAS 19475+3119
* Kronberger 61
* M1-92
* NGC 6826
* NGC 6881
* NGC 6884
* NGC 7008
* NGC 7026
* NGC 7027
* NGC 7048
* Soap Bubble Nebula

WR|

* Crescent Nebula

SNR|

* Cygnus Loop (including Veil Nebula)

Galaxies|

| NGC|

* 6801
* 6946
* 7013

|

Other|

* 3C 438
* Cygnus A

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