All names: SDSS J004238.78+191107.48, Gaia EDR3 2795202241366403712, GALEX J004238.8+191108, Gaia DR2 2795202241366403712, SDSS J004238.77+191107.4, SDSS J004238.78+191107.4, Gaia DR3 2795202241366403712
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 42 38.77 (0.9) | 00 42 38.78 | 00 42 38.77 (1) | 00 42 38.79 (0.8) | ||||
| Declination | 19 11 07.32 (0.4) | 19 11 07.44 | 19 11 07.33 (0.8) | 19 11 07.47 (0.4) | ||||
| Spectral type | DA | DA | DA | |||||
| Effective temperature | [K] | 8794.0 (113) | ||||||
| log(g) | [cgs] | 7.99 (0.2) | ||||||
| Mass | [M☉] | 0.477 (0.07) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 0.82 (1) | 1.37 (2) | 0.82 (1) | ||||
| Distance | [pc] | 1219.99 (1570) | 730.01 (917) | 1219.96 (1570) | ||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -20.50648459 (1) | -18.57282918 (3) | -20.506 (1) | ||||
| Proper motion (declination) | [mas/yr] | -9.11787097 (1) | -9.831149169 (2) | -9.118 (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 | 21.50 (0.2) | 21.45 (0.2) | 21.45 (0.2) | |||||
| g magnitude | 20.76 (0.04) | 20.78 (0.04) | 20.78 (0.04) | |||||
| r magnitude | 20.66 (0.05) | 20.69 (0.05) | 20.69 (0.05) | |||||
| i magnitude | 20.58 (0.06) | 20.61 (0.06) | 20.61 (0.06) | |||||
| z magnitude | 20.26 (0.2) | 20.25 (0.1) | 20.25 (0.1) | |||||
| G magnitude | 20.67 (0.1) | 20.75 | 20.67 (0.007) | |||||
| BP magnitude | 20.70 (0.1) | 21.00 | ||||||
| RP magnitude | 20.21 (0.1) | 20.40 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| 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.