All names: [HH86] 0252+024, US 3347, SDSS J025527.71+023713.3, 2MASS J02552770+0237136, SDSS J025527.71+023713.2, KUV 02529+0225, Gaia DR2 1559111783825792, WDJ025527.70+023714.08, WDJ025527.7+023714.07, Gaia EDR3 1559111783825792, GALEX J025527.6+023713, PB 6931, USNO-B1.0 0926-00039023, J0255+0237, TIC 365250270, Gaia DR3 1559111783825792
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 55 27.72 (0.07) | 02 55 27.72 | 02 55 27.72 | 02 55 27.70 (0.07) | 02 55 27.72 | ||||||||
| Declination | 02 37 12.55 (0.06) | 02 37 12.60 | 02 37 12.55 | 02 37 14.08 (0.06) | 02 37 12.60 | ||||||||
| Spectral type | DA | DA | DA | DA | DA | ||||||||
| Effective temperature | [K] | 8685.0 (42) | 8764.0 (41) | 8684.0 (42) | 8645.0 | 8386.0 | 8689.0 (139) | ||||||
| log(g) | [cgs] | 8.26 (0.009) | 8.29 (0.01) | 8.27 (0.01) | 8.26 | 8.17 | 8.26 (0.03) | ||||||
| Mass | [M☉] | 0.762 (0.008) | 0.776 (0.009) | 0.763 (0.009) | 0.758 | 0.684 | 0.759 (0.02) | ||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 1.3600 | 1.2850 | 1.2550 | |||||||||
| 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] | 14.78 (0.08) | 14.80 (0.1) | 14.80 (0.1) | 14.78 | 14.78 (0.08) | 14.80 (0.1) | ||||||
| Distance | [pc] | 67.67 (0.4) | 67.57 (0.5) | 67.57 (0.5) | 67.67 | 67.67 (0.4) | 67.57 (0.5) | ||||||
| Composition | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 20.85346295 (0.08) | 20.89822188 (0.2) | 20.853 (0.08) | 20.89822188 | ||||||||
| Proper motion (declination) | [mas/yr] | -95.42816284 (0.07) | -95.27791374 (0.2) | -95.428 (0.07) | -95.27791374 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.70 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 17.40 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.92 (0.02) | 16.56 (0.1) | |||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 17.66 (0.01) | 17.66 (0.01) | 17.66 (0.01) | ||||||||||
| g magnitude | 17.26 (0.005) | 17.26 (0.005) | |||||||||||
| r magnitude | 17.27 (0.005) | 17.27 (0.005) | |||||||||||
| i magnitude | 17.32 (0.006) | 17.32 (0.006) | |||||||||||
| z magnitude | 17.41 (0.01) | 17.41 (0.01) | |||||||||||
| G magnitude | 17.21 (0.006) | 17.23 | 17.21 | 17.21 (0.003) | 17.23 | ||||||||
| BP magnitude | 17.31 (0.006) | 17.30 | 17.30 | ||||||||||
| RP magnitude | 17.02 (0.01) | 17.03 | 17.03 | ||||||||||
| Pan g magnitude | 17.27 (0.003) | 17.27 (0.003) | |||||||||||
| Pan r magnitude | 17.29 (0.004) | 17.29 (0.004) | |||||||||||
| Pan i magnitude | 17.33 (0.004) | 17.33 (0.004) | |||||||||||
| Pan z magnitude | 17.45 (0.004) | 17.45 (0.004) | |||||||||||
| Pan y magnitude | 17.53 (0.006) | 17.53 (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.