All names: Gaia DR3 1313370663765104512, PG1656+318, PG 1656+318, 2MASS J16581768+3141370, Gaia DR2 1313370663764383232, TIC 159410746
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 58 17.71 | 16 58 17.68 (0.03) | ||
| Declination | 31 41 37.56 | 31 41 37.10 (0.03) | ||
| Spectral type | sdB | sdBO | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.04 (0.04) | 1.12 (0.04) | |
| Distance | [pc] | 966.00 (42) | 890.87 (29) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -8.895 (0.08) | -8.831 (0.04) | |
| Proper motion (declination) | [mas/yr] | -11.147 (0.08) | -11.346 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.88 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.94 (0.04) | 14.94 (0.04) | ||
| H magnitude | 14.94 (0.06) | 14.94 (0.06) | ||
| K magnitude | 15.23 (0.1) | 15.23 (0.1) | ||
| u magnitude | 13.69 (0.004) | |||
| g magnitude | ||||
| r magnitude | 14.44 (0.004) | |||
| i magnitude | 14.79 (0.004) | |||
| z magnitude | 15.13 (0.005) | |||
| G magnitude | 14.21 (0.0007) | 14.20 (0.003) | ||
| BP magnitude | 14.00 (0.006) | |||
| RP magnitude | 14.48 (0.002) | |||
| Pan g magnitude | 14.01 (0.005) | |||
| Pan r magnitude | 14.47 (0.003) | |||
| Pan i magnitude | 14.81 (0.002) | |||
| Pan z magnitude | 15.09 (0.002) | |||
| Pan y magnitude | 15.29 (0.005) | |||
| E(B-V) | 0.024 | |||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.