All names: GALEX J004420.7+090213, Gaia DR2 2557989853283690240, Gaia DR3 2557989853283690240, SDSS J004420.76+090213.3, Gaia EDR3 2557989853283690240
| Parameter | Unit | Gaia EDR3 | Stilism | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|
| Right ascension | 00 44 20.74 (0.3) | 00 44 20.80 (0.3) | |||
| Declination | 09 02 12.97 (0.2) | 09 02 13.79 (0.2) | |||
| Spectral type | DA | DA | |||
| 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] | 7.11 (0.4) | 7.11 (0.4) | ||
| Distance | [pc] | 140.60 (8) | 140.60 (8) | ||
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -55.314 (0.5) | -55.314 (0.5) | ||
| Proper motion (declination) | [mas/yr] | -51.421 (0.4) | -51.421 (0.4) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 20.55 (0.05) | ||||
| g magnitude | 20.00 (0.02) | ||||
| r magnitude | 19.81 (0.02) | ||||
| i magnitude | 19.81 (0.02) | ||||
| z magnitude | 19.96 (0.08) | ||||
| G magnitude | 19.78 (0.004) | 19.78 (0.004) | |||
| BP magnitude | 19.90 (0.07) | ||||
| RP magnitude | 19.43 (0.06) | ||||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.007 | ||||
* 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.