All names: SDSS J224459.62+331017.4, SDSS J224459.62+331017.40, Gaia DR3 1890785517284104960, Gaia EDR3 1890785517284104960, Gaia DR2 1890785517284104960, GALEX J224459.5+331016, WDJ224459.60+331017.37, SDSS J224459.60+331017.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025b | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 44 59.62 (0.2) | 22 44 59.61 | 22 44 59.62 (0.3) | 22 44 59.60 (0.2) | ||||||
| Declination | 33 10 17.26 (0.2) | 33 10 17.35 | 33 10 17.26 (0.3) | 33 10 17.36 (0.2) | ||||||
| Spectral type | DAH | DAH-DQ | DAH | DZ | ||||||
| Effective temperature | [K] | 20938.0 (885) | 26577.0 (1029) | |||||||
| log(g) | [cgs] | 9.00 (0.06) | 8.00 (0) | |||||||
| Mass | [M☉] | 1.201 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| 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] | 4.37 (0.3) | 4.28 (0.4) | 4.37 (0.3) | ||||||
| Distance | [pc] | 229.03 (16) | 233.49 (22) | 229.03 (16) | ||||||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 15.12040259 (0.3) | 14.55896519 (0.7) | 15.12 (0.3) | ||||||
| Proper motion (declination) | [mas/yr] | -5.970099564 (0.3) | -6.750039735 (0.6) | -5.97 (0.3) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 19.23 (0.03) | 19.21 (0.03) | 19.22 (0.03) | |||||||
| g magnitude | 19.33 (0.01) | 19.34 (0.02) | 19.34 (0.01) | |||||||
| r magnitude | 19.66 (0.02) | 19.66 (0.02) | 19.66 (0.02) | |||||||
| i magnitude | 19.89 (0.03) | 19.89 (0.03) | 19.88 (0.03) | |||||||
| z magnitude | 20.07 (0.1) | 20.09 (0.1) | 20.07 (0.1) | |||||||
| G magnitude | 19.52 (0.04) | 19.52 (0.004) | 19.57 | 19.52 (0.004) | ||||||
| BP magnitude | 19.43 (0.04) | 19.43 (0.04) | 19.40 | |||||||
| RP magnitude | 19.69 (0.06) | 19.69 (0.06) | 19.59 | |||||||
| Pan g magnitude | 19.43 (0.01) | 19.43 (0.01) | ||||||||
| Pan r magnitude | 19.68 (0.02) | 19.68 (0.02) | ||||||||
| Pan i magnitude | 19.93 (0.01) | 19.93 (0.01) | ||||||||
| Pan z magnitude | 20.21 (0.07) | 20.21 (0.07) | ||||||||
| Pan y magnitude | 20.09 (0.08) | 20.09 (0.08) | ||||||||
| E(B-V) | 0.043 | |||||||||
* 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.