All names: SDSS J020941.50+304458.41, GALEX J020941.4+304459, Gaia DR2 300533842547559936, SDSS J020941.50+304458.4, Gaia DR3 300533846843170560
| Parameter | Unit | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|
| Right ascension | 02 09 41.50 | 02 09 41.49 (1) | 02 09 41.49 (7) | |||
| Declination | 30 44 58.38 | 30 44 58.26 (1) | 30 44 58.30 (1e+01) | |||
| Spectral type | DC: | DC | ||||
| Effective temperature | [K] | 7871.0 (137) | ||||
| log(g) | [cgs] | 8.00 (0) | ||||
| Mass | [M☉] | |||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | |||||
| Distance | [pc] | |||||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | |||||
| Proper motion (declination) | [mas/yr] | |||||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | 20.35 (0.05) | 20.38 (0.05) | 20.38 (0.05) | |||
| g magnitude | 19.81 (0.02) | 19.87 (0.03) | 19.87 (0.03) | |||
| r magnitude | 19.64 (0.02) | 19.69 (0.02) | 19.69 (0.02) | |||
| i magnitude | 19.67 (0.02) | 19.74 (0.03) | 19.74 (0.03) | |||
| z magnitude | 19.71 (0.09) | 19.72 (0.08) | 19.72 (0.08) | |||
| G magnitude | 20.08 | 20.30 (0.02) | ||||
| BP magnitude | 19.83 | |||||
| RP magnitude | 19.32 | |||||
| Pan g magnitude | 19.77 (0.02) | |||||
| Pan r magnitude | 19.67 (0.01) | |||||
| Pan i magnitude | 19.68 (0.009) | |||||
| Pan z magnitude | 19.71 (0.03) | |||||
| Pan y magnitude | 19.81 (0.03) | |||||
| 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.