All names: J0742+2857, WISEA J074231.96+285726.7, WDJ074231.99+285727.43, ULAS J074231.95+285727.1, WISE J074231.93+285726.9, Gaia DR2 878635723331279360, SDSS J074231.98+285727.3, SDSS J074231.98+285727.4, Gaia EDR3 878635723331279360, Gaia DR3 878635723331279360, GALEX J074231.9+285728
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 42 31.94 (0.1) | 07 42 31.94 | 07 42 31.94 | 07 42 31.99 (0.1) | 07 42 31.94 | ||||||
| Declination | 28 57 26.87 (0.09) | 28 57 26.89 | 28 57 26.87 | 28 57 27.43 (0.09) | 28 57 26.89 | ||||||
| Spectral type | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 8412.0 (59) | 8155.0 (50) | 8411.0 (59) | 8749.0 (207) | ||||||
| log(g) | [cgs] | 7.96 (0.02) | 7.89 (0.03) | 7.96 (0.03) | 8.04 (0.04) | ||||||
| Mass | [M☉] | 0.569 (0.01) | 0.531 (0.02) | 0.573 (0.02) | 0.624 (0.04) | ||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.9200 | |||||||||
| 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] | 10.23 (0.1) | 10.27 (0.2) | 10.27 (0.2) | 10.23 | 10.23 (0.1) | 10.27 (0.2) | ||||
| Distance | [pc] | 97.75 (1) | 97.37 (2) | 97.33 (2) | 97.75 | 97.75 (1) | 97.33 (2) | ||||
| Composition | H | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | -43.65249896 (0.1) | -43.93607966 (0.3) | -43.652 (0.1) | -43.93607966 | ||||||
| Proper motion (declination) | [mas/yr] | -35.10034324 (0.09) | -35.19982858 (0.3) | -35.1 (0.09) | -35.19982858 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 17.32 (0.02) | 17.32 (0.02) | |||||||||
| H magnitude | 17.09 (0.03) | 17.09 (0.03) | |||||||||
| K magnitude | 16.88 (0.05) | 16.88 (0.05) | |||||||||
| u magnitude | 18.19 (0.01) | 18.17 (0.01) | 18.17 (0.01) | ||||||||
| g magnitude | 17.71 (0.005) | 17.71 (0.005) | |||||||||
| r magnitude | 17.70 (0.006) | 17.70 (0.006) | |||||||||
| i magnitude | 17.77 (0.007) | 17.77 (0.007) | |||||||||
| z magnitude | 17.87 (0.02) | 17.87 (0.02) | |||||||||
| G magnitude | 17.66 (0.02) | 17.68 | 17.66 | 17.66 (0.003) | 17.68 | ||||||
| BP magnitude | 17.73 (0.02) | 17.78 | 17.78 | ||||||||
| RP magnitude | 17.47 (0.03) | 17.51 | 17.51 | ||||||||
| Pan g magnitude | 17.73 (0.006) | 17.73 (0.005) | |||||||||
| Pan r magnitude | 17.72 (0.004) | 17.72 (0.004) | |||||||||
| Pan i magnitude | 17.78 (0.004) | 17.79 (0.004) | |||||||||
| Pan z magnitude | 17.86 (0.01) | 17.86 (0.009) | |||||||||
| Pan y magnitude | 17.95 (0.008) | 17.95 (0.007) | |||||||||
| E(B-V) | 0.003 | ||||||||||
* 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.