All names: SDSS J165754.01+320454.8, Gaia DR2 1313444468482681984, Gaia DR3 1313444468482681984, PG 1656+322, 2MASS J16575402+3204548, PG1656+322, SDSS J165754.02+320454.9, TIC 341756829
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 57 54.01 | 16 57 54.01 (0.02) | ||
| Declination | 32 04 54.94 | 32 04 54.86 (0.02) | ||
| Spectral type | sd | sdOB | ||
| 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] | 0.77 (0.03) | 0.71 (0.03) | |
| Distance | [pc] | 1303.44 (59) | 1399.19 (56) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.4 (0.06) | 3.606 (0.03) | |
| Proper motion (declination) | [mas/yr] | 2.2 (0.07) | 1.795 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.65 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.51 (0.03) | 14.51 (0.03) | ||
| H magnitude | 14.19 (0.04) | 14.19 (0.04) | ||
| K magnitude | 14.23 (0.05) | 14.23 (0.05) | ||
| u magnitude | 14.37 (0.003) | 14.36 (0.004) | ||
| g magnitude | 14.55 (0.003) | 14.54 (0.003) | ||
| r magnitude | 14.85 (0.003) | 14.84 (0.003) | ||
| i magnitude | 15.00 (0.003) | 14.99 (0.004) | ||
| z magnitude | 15.12 (0.005) | 15.13 (0.005) | ||
| G magnitude | 14.68 (0.0005) | 14.67 (0.003) | ||
| BP magnitude | 14.58 (0.005) | |||
| RP magnitude | 14.68 (0.002) | |||
| Pan g magnitude | 14.62 (0.002) | |||
| Pan r magnitude | 14.87 (0.002) | |||
| Pan i magnitude | 15.03 (0.003) | |||
| Pan z magnitude | 15.14 (0.002) | |||
| Pan y magnitude | 15.21 (0.006) | |||
| 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.