All names: Gaia DR2 4231363125315936256, GALEX J203826.4+010954, Gaia EDR3 4231363125315936256, SDSSJ203826.41+010953.5, Gaia DR3 4231363125315936256, SDSS J203826.41+010953.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 38 26.41 (0.08) | 20 38 26.41 | 20 38 26.41 | 20 38 26.41 (0.1) | 20 38 26.42 (0.08) | 20 38 26.41 | |||
| Declination | 01 09 53.41 (0.06) | 01 09 53.54 | 01 09 53.50 | 01 09 53.41 (0.1) | 01 09 53.54 (0.06) | 01 09 53.54 | |||
| Spectral type | sdB | sdB | SD_auto | ||||||
| Effective temperature | [K] | 27624.0 (1322) | 28507.0 (226) | ||||||
| log(g) | [cgs] | 5.44 (0.2) | 5.37 (0.05) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.24 (0.1) | 0.34 (0.1) | 0.34 (0.1) | 0.24 (0.1) | ||||
| Distance | [pc] | 4090.21 (1806) | 2963.84 (1009) | 2963.42 (1009) | 4089.98 (1805) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -6.006423575 (0.1) | -6.227 (0.2) | -6.227311744 (0.2) | -6.006 (0.1) | 1.2 | |||
| Proper motion (declination) | [mas/yr] | -8.410739214 (0.1) | -8.327 (0.2) | -8.327321038 (0.2) | -8.411 (0.1) | -3.7 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | 17.25 (0.07) | ||||||||
| K magnitude | 17.40 (0.1) | ||||||||
| u magnitude | 17.04 (0.008) | 17.04 (0.008) | 17.04 (0.008) | 17.05 (0.01) | |||||
| g magnitude | 17.09 (0.004) | 17.09 (0.004) | 17.09 (0.004) | 17.11 (0.008) | |||||
| r magnitude | 17.49 (0.006) | 17.49 (0.006) | 17.49 (0.006) | 17.49 (0.009) | |||||
| i magnitude | 17.72 (0.007) | 17.72 (0.007) | 17.72 (0.007) | 17.74 (0.008) | |||||
| z magnitude | 17.92 (0.02) | 17.92 (0.02) | 17.92 (0.02) | 17.95 (0.03) | |||||
| G magnitude | 17.30 (0.006) | 17.33 (0.002) | 17.33 | 17.30 (0.003) | |||||
| BP magnitude | 17.23 (0.006) | 17.17 (0.008) | 17.17 | ||||||
| RP magnitude | 17.45 (0.01) | 17.44 (0.01) | 17.44 | ||||||
| Pan g magnitude | 17.17 (0.005) | 17.17 (0.005) | |||||||
| Pan r magnitude | 17.51 (0.004) | 17.51 (0.004) | |||||||
| Pan i magnitude | 17.78 (0.003) | 17.78 (0.003) | |||||||
| Pan z magnitude | 17.97 (0.004) | 17.97 (0.004) | |||||||
| Pan y magnitude | 18.11 (0.02) | 18.11 (0.03) | |||||||
| E(B-V) | 0.055 | ||||||||
* 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.