All names: Gaia DR3 6913420603662102784, USNO-B1.0 0842-00612195, SDSS J204546.81-054355.6, Gaia DR2 6913420603660620416, SDSS J204546.82-054355.6, Gaia EDR3 6913420603662102784, GALEX J204546.8-054355, SDSSJ204546.81-054355.6, SDSS J204546.81-054355.7
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 45 46.82 (0.4) | 20 45 46.82 | 20 45 46.81 | 20 45 46.82 (0.4) | 20 45 46.82 (0.4) | 20 45 46.82 | |||
| Declination | -05 43 55.89 (0.3) | -05 43 55.70 | -05 43 55.60 | -05 43 55.88 (0.3) | -05 43 55.65 (0.3) | -05 43 55.71 | |||
| Spectral type | sdB+G | sdB | SDB | ||||||
| Effective temperature | [K] | 35500.0 (500) | 31838.0 (322) | ||||||
| log(g) | [cgs] | 5.47 (0.09) | 5.00 (0.01) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.65 (0.5) | 0.65 (0.5) | 0.65 (0.5) | 0.65 (0.5) | ||||
| Distance | [pc] | 1534.13 (1169) | 1540.59 (1252) | 1540.55 (1252) | 1534.21 (1169) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -1.612029749 (0.5) | 2.314 (0.9) | 2.314236052 (0.9) | -1.612 (0.5) | -4.6 | |||
| Proper motion (declination) | [mas/yr] | -14.78552411 (0.4) | -16.727 (0.6) | -16.72679918 (0.6) | -14.786 (0.4) | -14.7 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 17.90 | ||||||||
| V magnitude | |||||||||
| R magnitude | 17.40 | ||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 17.59 (0.01) | 17.59 (0.01) | 17.61 (0.01) | 17.61 (0.02) | |||||
| g magnitude | 17.74 (0.005) | 17.74 (0.005) | 17.74 (0.005) | 17.77 (0.01) | |||||
| r magnitude | 17.95 (0.007) | 17.95 (0.007) | 17.94 (0.007) | 17.95 (0.007) | |||||
| i magnitude | 18.06 (0.008) | 18.05 (0.008) | 18.05 (0.008) | 18.08 (0.01) | |||||
| z magnitude | 18.13 (0.03) | 18.13 (0.03) | 18.13 (0.03) | 18.16 (0.03) | |||||
| G magnitude | 17.91 (0.008) | 17.88 (0.004) | 17.88 | 17.91 (0.006) | |||||
| BP magnitude | 17.81 (0.008) | 17.76 (0.01) | 17.76 | ||||||
| RP magnitude | 17.73 (0.01) | 17.73 (0.01) | 17.73 | ||||||
| Pan g magnitude | 17.77 (0.009) | 17.77 (0.009) | |||||||
| Pan r magnitude | 17.97 (0.006) | 17.96 (0.006) | |||||||
| Pan i magnitude | 18.09 (0.005) | 18.09 (0.005) | |||||||
| Pan z magnitude | 18.16 (0.01) | 18.16 (0.01) | |||||||
| Pan y magnitude | 18.18 (0.02) | 18.18 (0.02) | |||||||
| E(B-V) | 0.044 | ||||||||
* 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.