All names: Gaia DR2 1777269424274555776, J2225+1835, WDJ222542.04+183518.85, Gaia EDR3 1777269424274555776, SDSS J222541.95+183518.1, SDSS J222541.95+183518.0, Gaia DR3 1777269424274555776
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 25 41.90 (0.06) | 22 25 41.90 | 22 25 42.04 (0.06) | 22 25 41.90 | ||||||
| Declination | 18 35 17.60 (0.06) | 18 35 17.64 | 18 35 18.85 (0.06) | 18 35 17.64 | ||||||
| Spectral type | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 7329.0 (42) | 7394.0 (32) | 7329.0 (42) | ||||||
| log(g) | [cgs] | 8.09 (0.009) | 8.12 (0.007) | 8.10 (0.009) | ||||||
| Mass | [M☉] | 0.632 (0.008) | 0.652 (0.007) | 0.633 (0.009) | ||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 1.6900 | ||||||||
| log(H/He) | -3.6 | -3.6 | -3.6 | |||||||
| 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] | 23.23 (0.08) | 23.27 (0.09) | 23.27 (0.09) | 23.23 (0.07) | 23.27 (0.09) | ||||
| Distance | [pc] | 43.05 (0.1) | 42.97 (0.2) | 42.97 (0.2) | 43.05 (0.1) | 42.97 (0.2) | ||||
| Composition | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -126.1287831 (0.07) | -126.2824084 (0.1) | -126.129 (0.07) | -126.2824084 | |||||
| Proper motion (declination) | [mas/yr] | -78.14244747 (0.08) | -78.20364933 (0.1) | -78.142 (0.08) | -78.20364933 | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 16.34 (0.01) | |||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.22 (0.01) | 17.21 (0.01) | 17.21 (0.01) | |||||||
| g magnitude | 16.80 (0.004) | 16.80 (0.004) | ||||||||
| r magnitude | 16.69 (0.004) | 16.69 (0.004) | ||||||||
| i magnitude | 16.71 (0.005) | 16.71 (0.005) | ||||||||
| z magnitude | 16.80 (0.01) | 16.80 (0.01) | ||||||||
| G magnitude | 16.66 (0.02) | 16.68 | 16.66 (0.003) | 16.68 | ||||||
| BP magnitude | 16.88 (0.02) | 16.81 | 16.81 | |||||||
| RP magnitude | 16.62 (0.06) | 16.42 | 16.42 | |||||||
| Pan g magnitude | 16.80 (0.006) | 16.80 (0.005) | ||||||||
| Pan r magnitude | 16.70 (0.003) | 16.70 (0.004) | ||||||||
| Pan i magnitude | 16.74 (0.003) | 16.74 (0.002) | ||||||||
| Pan z magnitude | 16.82 (0.006) | 16.82 (0.005) | ||||||||
| Pan y magnitude | 16.90 (0.006) | 16.90 (0.006) | ||||||||
| E(B-V) | 0.002 | |||||||||
* 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.