All names: Gaia DR3 1729718192073458688, 2MASS J20575844+0108176, SDSS J205758.45+010817.5, SDSS J205758.45+010817.6, Gaia DR2 1729718192073458688, TIC 396478270, SDSSJ205758.45+010817.6, SDSS J205758.46+010817.6, Gaia EDR3 1729718192073458688, GALEX J205758.4+010817
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 57 58.44 (0.07) | 20 57 58.45 | 20 57 58.45 | 20 57 58.44 (0.1) | 20 57 58.46 (0.07) | 20 57 58.45 | |||
| Declination | 01 08 17.42 (0.03) | 01 08 17.51 | 01 08 17.60 | 01 08 17.43 (0.05) | 01 08 17.67 (0.03) | 01 08 17.65 | |||
| Spectral type | sdOB | sdOB | SD_auto | ||||||
| Effective temperature | [K] | 29964.0 (196) | |||||||
| log(g) | [cgs] | 5.00 (0.002) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.23 (0.1) | 0.13 (0.1) | 0.13 (0.1) | 0.23 (0.1) | ||||
| Distance | [pc] | 4312.60 (1836) | 7686.40 (7326) | 7687.24 (7328) | 4312.20 (1835) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -14.15655198 (0.1) | -14.17 (0.2) | -14.1702426 (0.2) | -14.157 (0.1) | -17.1 | |||
| Proper motion (declination) | [mas/yr] | -15.61177398 (0.05) | -15.598 (0.1) | -15.59790207 (0.1) | -15.612 (0.05) | -13.0 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.33 (0.09) | 16.33 (0.09) | |||||||
| H magnitude | 16.15 (0.1) | 16.15 (0.1) | |||||||
| K magnitude | 15.88 (0.3) | 15.88 (0.3) | |||||||
| u magnitude | 16.96 (0.008) | 16.96 (0.008) | 16.96 (0.008) | 16.97 (0.02) | |||||
| g magnitude | 16.81 (0.004) | 16.81 (0.004) | 16.81 (0.004) | 16.83 (0.009) | |||||
| r magnitude | 16.88 (0.005) | 16.88 (0.005) | 16.88 (0.005) | 16.87 (0.009) | |||||
| i magnitude | 16.92 (0.005) | 16.92 (0.005) | 16.92 (0.005) | 16.93 (0.007) | |||||
| z magnitude | 16.97 (0.01) | 16.97 (0.01) | 16.99 (0.01) | 16.98 (0.02) | |||||
| G magnitude | 16.77 (0.005) | 16.80 (0.001) | 16.80 | 16.77 (0.003) | |||||
| BP magnitude | 16.86 (0.005) | 16.83 (0.007) | 16.83 | ||||||
| RP magnitude | 16.60 (0.006) | 16.61 (0.007) | 16.61 | ||||||
| Pan g magnitude | 16.84 (0.003) | 16.84 (0.003) | |||||||
| Pan r magnitude | 16.89 (0.002) | 16.89 (0.002) | |||||||
| Pan i magnitude | 16.95 (0.002) | 16.95 (0.002) | |||||||
| Pan z magnitude | 17.00 (0.003) | 17.00 (0.003) | |||||||
| Pan y magnitude | 17.04 (0.003) | 17.04 (0.003) | |||||||
| E(B-V) | 0.054 | ||||||||
* 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.