All names: GALEXJ20566+0401, Gaia DR3 1731490128076542976, SDSS J205640.42+040123.6, UCAC2 33318666, Gaia DR2 1731490128076542976, UCAC4 471-125242, 2MASS J20564042+0401235, WISE J205640.42+040123.6, TIC 396374220, GALEX J205640.5+040124, WISEA J205640.42+040123.5, SDSS J205640.42+040123.4
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 56 40.58 | 20 56 40.43 (0.03) | ||
| Declination | 04 01 24.53 | 04 01 23.68 (0.02) | ||
| 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] | 1.32 (0.06) | 1.19 (0.04) | |
| Distance | [pc] | 758.84 (36) | 841.11 (25) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -8.778 (0.1) | -8.657 (0.04) | |
| Proper motion (declination) | [mas/yr] | -9.9 (0.09) | -9.631 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.44 (0.02) | |||
| V magnitude | 13.54 (0.2) | |||
| R magnitude | 13.91 (0.08) | |||
| I magnitude | ||||
| J magnitude | 14.24 (0.03) | 14.24 (0.03) | ||
| H magnitude | 14.29 (0.04) | 14.29 (0.04) | ||
| K magnitude | 14.33 (0.07) | 14.33 (0.07) | ||
| u magnitude | 13.27 (0.004) | |||
| g magnitude | 13.46 (0.01) | |||
| r magnitude | 15.00 (0.01) | 13.79 (0.2) | ||
| i magnitude | 14.24 (0.005) | 14.07 (0.2) | ||
| z magnitude | 14.55 (0.006) | |||
| G magnitude | 13.64 (0.0006) | 13.63 (0.003) | ||
| BP magnitude | 13.44 (0.009) | |||
| RP magnitude | 13.87 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | 18.99 (0) | |||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.062 | |||
* 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.