All names: SDSS J023819.94+740429.2, SDSS J023819.94+740429.3, GALEX J023819.8+740428, SDSSJ023819.94+740429.3, Gaia DR3 546832800882546176, Gaia DR2 546832800882546176
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 02 38 19.94 | 02 38 19.95 (0.02) | ||
| Declination | 74 04 29.31 | 74 04 29.19 (0.02) | ||
| 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] | 0.47 (0.03) | 0.46 (0.02) | |
| Distance | [pc] | 2129.93 (142) | 2160.76 (111) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.53 (0.05) | 3.475 (0.02) | |
| Proper motion (declination) | [mas/yr] | 0.793 (0.05) | 0.812 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.21 (0.04) | |||
| H magnitude | 13.95 (0.03) | |||
| K magnitude | 13.77 (0.04) | |||
| u magnitude | 16.73 (0.008) | 16.73 (0.008) | ||
| g magnitude | 15.91 (0.004) | 15.91 (0.004) | ||
| r magnitude | 15.44 (0.003) | 15.44 (0.003) | ||
| i magnitude | 15.22 (0.004) | 15.22 (0.004) | ||
| z magnitude | 15.11 (0.005) | 15.11 (0.005) | ||
| G magnitude | 15.45 (0.0005) | 15.44 (0.003) | ||
| BP magnitude | 15.80 (0.004) | |||
| RP magnitude | 14.90 (0.002) | |||
| Pan g magnitude | 15.88 (0.0006) | |||
| Pan r magnitude | 15.46 (0.004) | |||
| Pan i magnitude | 15.26 (0.004) | |||
| Pan z magnitude | 15.18 (0.003) | |||
| Pan y magnitude | 15.09 (0.005) | |||
| E(B-V) | 0.304 | |||
* 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.