HD 197037
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| A | |
| Right ascension | 20h 39m 32.95994s |
| Declination | +42° 14′ 54.7783″ |
| Apparent magnitude (V) | 6.813 |
| B | |
| Right ascension | 20h 39m 32.93627s |
| Declination | +42° 14′ 51.1696″ |
| Characteristics | |
| HD 197037 A | |
| Evolutionary stage | main sequence |
| Spectral type | F7V |
| HD 197037 B | |
| Spectral type | M |
| Astrometry | |
| A | |
| Radial velocity (Rv) | 9.087±0.199 km/s |
| Proper motion (μ) | RA: −62.745 mas/yr Dec.: −222.168 mas/yr |
| Parallax (π) | 30.2286±0.0143 mas |
| Distance | 107.90 ± 0.05 ly (33.08 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.26 |
| B | |
| Proper motion (μ) | RA: −54.165 mas/yr Dec.: −227.397 mas/yr |
| Parallax (π) | 30.3173 ± 0.0339 mas |
| Distance | 107.6 ± 0.1 ly (32.98 ± 0.04 pc) |
| Position (relative to HD 197037 A) | |
| Component | HD 197037 B |
| Epoch of observation | 2013 |
| Angular distance | 3.676±0.011″ |
| Position angle | 182.21±0.18° |
| Projected separation | 121 AU |
| Details | |
| 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 K |
| Metallicity [Fe/H] | −0.16±0.03 dex |
| Rotation | 19.1 d |
| Age | 3.408±0.924 Gyr |
| HD 197037 B | |
| Mass | 0.3412+0.0098 −0.0477 M☉ |
| Radius | 0.16 R☉ |
| Luminosity | 0.01 L☉ |
| Temperature | 4,766 K |
| Other designations | |
| BD+41 3845, HIP 101948, LTT 16037, NLTT 49662, TYC 3161-126-1, 2MASS J20393296+4214549 | |
| 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.
A multiplicity survey detected a red dwarf stellar companion HD 197037 B in 2016, at a projected separation of 121 AU. The existence of other stellar companions at projected separations from 1.62 to 45.26 AU was excluded.