All names: SDSSJ205433.17+170229.2, Gaia DR2 1764708332857425024, SDSS J205433.17+170229.2, 2MASS J20543318+1702291, Gaia DR3 1764708332857425024, GALEX J205433.1+170228, TIC 345187035, Gaia EDR3 1764708332857425024
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 54 33.17 (0.03) | 20 54 33.17 | 20 54 33.17 (0.03) | ||
| Declination | 17 02 29.13 (0.03) | 17 02 29.23 | 17 02 29.22 (0.03) | ||
| Spectral type | sd | sd | |||
| 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] | 0.64 (0.04) | 0.69 (0.06) | 0.64 (0.04) | |
| Distance | [pc] | 1554.00 (101) | 1439.06 (127) | 1554.00 (101) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -1.889 (0.04) | -1.796 (0.1) | -1.889 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.449 (0.04) | -5.628 (0.1) | -5.449 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.60 (0.1) | 16.60 (0.1) | |||
| H magnitude | 15.96 (0.2) | 15.96 (0.2) | |||
| K magnitude | 15.63 | ||||
| u magnitude | 15.62 (0.005) | 15.63 (0.01) | |||
| g magnitude | 15.71 (0.004) | 15.74 (0.008) | |||
| r magnitude | 16.11 (0.004) | 16.17 (0.01) | |||
| i magnitude | 16.40 (0.005) | 16.37 (0.007) | |||
| z magnitude | 16.66 (0.01) | 16.68 (0.02) | |||
| G magnitude | 15.94 (0.003) | 15.96 (0.001) | 15.94 (0.003) | ||
| BP magnitude | 15.85 (0.003) | 15.82 (0.005) | |||
| RP magnitude | 16.11 (0.005) | 16.12 (0.007) | |||
| Pan g magnitude | 15.81 (0.002) | ||||
| Pan r magnitude | 16.14 (0.002) | ||||
| Pan i magnitude | 16.46 (0.005) | ||||
| Pan z magnitude | 16.67 (0.009) | ||||
| Pan y magnitude | 16.85 (0.003) | ||||
| E(B-V) | 0.076 | ||||
* 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.