All names: 2MASS J16575158+5511330, Gaia DR2 1426426327686319360, PG 1656+553, SBSS 1656+552, GALEX J165751.6+551132, UCAC4 726-052375, TIC 199715319, PG1656+553, Gaia DR3 1426426327686319360
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 57 51.64 | 16 57 51.59 (0.03) | ||
| Declination | 55 11 32.79 | 55 11 32.59 (0.03) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.43 (0.04) | 0.41 (0.03) | |
| Distance | [pc] | 2333.18 (214) | 2441.41 (194) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -5.068 (0.09) | -5.255 (0.05) | |
| Proper motion (declination) | [mas/yr] | -4.968 (0.1) | -4.55 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.38 (0.03) | |||
| V magnitude | 15.52 (0.01) | |||
| R magnitude | 15.93 (0.08) | |||
| I magnitude | ||||
| J magnitude | 16.22 (0.1) | 16.22 (0.1) | ||
| H magnitude | 16.14 (0.2) | 16.14 (0.2) | ||
| K magnitude | 16.08 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.56 (0.0008) | 15.55 (0.003) | ||
| BP magnitude | 15.35 (0.009) | |||
| RP magnitude | 15.83 (0.004) | |||
| Pan g magnitude | 15.38 (0.006) | |||
| Pan r magnitude | 15.80 (0.002) | |||
| Pan i magnitude | 16.16 (0.002) | |||
| Pan z magnitude | 16.43 (0.004) | |||
| Pan y magnitude | 16.61 (0.01) | |||
| 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.