All names: SDSS J230228.03+231747.9, Gaia EDR3 2842102386590435200, Gaia DR3 2842102386590435200, SDSS J230228.08+231747.91, GALEX J230228.0+231749, SDSS J230228.08+231747.9, Gaia DR2 2842102386590435200, SDSS J230228.07+231747.9
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 02 28.09 (0.2) | 23 02 28.04 | 23 02 28.09 (0.3) | 23 02 28.02 (0.2) | |||||
| Declination | 23 17 47.88 (0.2) | 23 17 47.97 | 23 17 47.89 (0.3) | 23 17 48.02 (0.2) | |||||
| Spectral type | DA | DA | DA | DA | |||||
| Effective temperature | [K] | 41554.0 (1062) | 40127.0 (708) | ||||||
| log(g) | [cgs] | 7.49 (0.1) | 7.79 (0.06) | ||||||
| Mass | [M☉] | 0.46 (0.04) | 0.5720000000000001 (0.02) | ||||||
| log(Luminosity) | [L☉] | 0.04 (0.09) | |||||||
| Cooling age | [Gyr] | 0.0013 (0.0007) | |||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| log(C/H) | |||||||||
| log(N/H) | |||||||||
| log(O/H) | |||||||||
| log(Na/H) | |||||||||
| log(Mg/H) | |||||||||
| log(Al/H) | |||||||||
| log(Si/H) | |||||||||
| log(P/H) | |||||||||
| log(S/H) | |||||||||
| log(Sc/H) | |||||||||
| log(Ti/H) | |||||||||
| log(Cr/H) | |||||||||
| log(Mn/H) | |||||||||
| log(Fe/H) | |||||||||
| log(Ni/H) | |||||||||
| Parallax | [mas] | 1.01 (0.3) | 0.91 (0.3) | 1.01 (0.3) | |||||
| Distance | [pc] | 988.43 (278) | 1097.94 (415) | 988.44 (278) | |||||
| Composition | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | 62.74543283 (0.4) | 62.51 (0.8) | 62.745 (0.4) | |||||
| Proper motion (declination) | [mas/yr] | -8.372336776 (0.4) | -8.681 (0.6) | -8.372 (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 | 18.87 (0.02) | 18.89 (0.2) | 18.88 (0.02) | ||||||
| g magnitude | 19.45 (0.01) | 19.44 (0.7) | 19.45 (0.01) | ||||||
| r magnitude | 20.62 (0.03) | 20.56 (0.2) | 20.61 (0.03) | ||||||
| i magnitude | 24.36 (0.6) | 24.36 (0.06) | 24.36 (0.6) | ||||||
| z magnitude | 20.17 (0.1) | 20.11 (0.1) | 20.15 (0.1) | ||||||
| G magnitude | 19.21 (0.02) | 19.26 | 19.21 (0.004) | ||||||
| BP magnitude | 19.20 (0.02) | 19.06 | |||||||
| RP magnitude | 19.35 (0.05) | 19.26 | |||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.052 | ||||||||
* 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.