All names: GALEX J203031.4-244357, Gaia DR2 6848609890764322432, Gaia DR3 6848609890764322432
| Parameter | Unit | Vincent et al. 2024 | Simbad |
|---|---|---|---|
| Right ascension | 20 30 31.50 | 20 30 31.49 (0.1) | |
| Declination | -24 43 57.85 | -24 43 57.88 (0.09) | |
| Spectral type | DA | DA | |
| Effective temperature | [K] | 19632.0 (862) | |
| log(g) | [cgs] | 7.16 (0.07) | |
| Mass | [M☉] | 0.298 (0.02) | |
| log(Luminosity) | [L☉] | ||
| Cooling age | [Gyr] | ||
| log(H/He) | |||
| log(C/He) | |||
| log(Ca/He) | |||
| log(Ca/H) | |||
| Parallax | [mas] | 2.23 | 2.23 (0.1) |
| Distance | [pc] | 448.68 | 448.67 (28) |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | 10.573 (0.2) | |
| Proper motion (declination) | [mas/yr] | 2.056 (0.1) | |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | |||
| V magnitude | |||
| R magnitude | |||
| I magnitude | |||
| J magnitude | |||
| H magnitude | |||
| K magnitude | |||
| u magnitude | |||
| g magnitude | |||
| r magnitude | |||
| i magnitude | |||
| z magnitude | |||
| G magnitude | 17.93 | 17.93 (0.003) | |
| BP magnitude | |||
| RP magnitude | |||
| Pan g magnitude | |||
| Pan r magnitude | |||
| Pan i magnitude | |||
| Pan z magnitude | |||
| Pan y magnitude | |||
| E(B-V) | |||
* 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.