All names: WD 0224+683, Gaia EDR3 517772326308392192, GALEX J022849.9+683535, Gaia DR2 517772326308392192, Lan 142, Gaia DR3 517772326308392192
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | MWDD HE | Gaia DR2 | Stilism | Bergeron et al. 2011 | Lepine et al. 2011 | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 28 49.96 (0.06) | 02 28 49.96 (0.09) | 02 28 49.96 | 02 28 49.91 (0.06) | ||||||
| Declination | 68 35 36.24 (0.07) | 68 35 36.26 (0.08) | 68 35 36.24 | 68 35 37.03 (0.07) | ||||||
| Spectral type | DB | DB | DB3.0 | DB | DB3 | |||||
| Effective temperature | [K] | 13798.0 | 17830.0 (474) | 18020.0 (507) | 14056.0 (373) | |||||
| log(g) | [cgs] | 7.73 | 8.19 (0.1) | 8.23 (0.2) | 7.72 (0.04) | |||||
| Mass | [M☉] | 0.443 | 0.71 (0.06) | 0.74 (0.1) | 0.44 (0.03) | |||||
| log(Luminosity) | [L☉] | -1.95 | ||||||||
| Cooling age | [Gyr] | 0.1748 | 0.1622 | 0.1700 | ||||||
| log(H/He) | <-4.88 (0.5) | <-5.08 | ||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| log(N/He) | ||||||||||
| log(O/He) | ||||||||||
| log(Na/He) | ||||||||||
| log(Mg/He) | ||||||||||
| log(Al/He) | ||||||||||
| log(Si/He) | ||||||||||
| log(P/He) | ||||||||||
| log(S/He) | ||||||||||
| log(Cl/He) | ||||||||||
| log(Sc/He) | ||||||||||
| log(Ti/He) | ||||||||||
| log(V/He) | ||||||||||
| log(Cr/He) | ||||||||||
| log(Mn/He) | ||||||||||
| log(Fe/He) | ||||||||||
| log(Co/He) | ||||||||||
| log(Ni/He) | ||||||||||
| log(Cu/He) | ||||||||||
| log(Zn/He) | ||||||||||
| log(Ga/He) | ||||||||||
| log(Ge/He) | ||||||||||
| log(Sr/He) | ||||||||||
| Parallax | [mas] | 4.60 (0.09) | 4.66 (0.1) | 4.60 | 4.60 (0.09) | |||||
| Distance | [pc] | 217.60 (4) | 214.46 (5) | 209.00 | 203.00 | 217.60 | 217.59 (4) | |||
| Composition | He | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | 15.04918089 (0.08) | 15.04907974 (0.2) | 15.049 (0.08) | ||||||
| Proper motion (declination) | [mas/yr] | -49.71822219 (0.1) | -49.9137654 (0.2) | -49.718 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 17.60 | |||||||||
| V magnitude | 17.78 | |||||||||
| R magnitude | 18.00 | |||||||||
| I magnitude | 18.30 | |||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | ||||||||||
| g magnitude | ||||||||||
| r magnitude | ||||||||||
| i magnitude | ||||||||||
| z magnitude | ||||||||||
| G magnitude | 17.70 (0.006) | 17.73 | 17.70 | 17.70 (0.003) | ||||||
| BP magnitude | 17.66 (0.006) | 17.64 | ||||||||
| RP magnitude | 17.83 (0.01) | 17.78 | ||||||||
| Pan g magnitude | 17.65 (0.004) | |||||||||
| Pan r magnitude | 17.88 (0.007) | |||||||||
| Pan i magnitude | 18.12 (0.005) | |||||||||
| Pan z magnitude | 18.35 (0.01) | |||||||||
| Pan y magnitude | 18.47 (0.03) | |||||||||
| E(B-V) | 0.049 | |||||||||
* 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.