All names: Gaia EDR3 1680452683804651520, Gaia DR2 1680452683804651520, LSPM J1242+6542, SDSS J124258.39+654219.9, SDSS J124258.40+654219.9, J1242+6542, 12429+6542, WDJ124258.40+654219.95, 2MASS J12425838+6542199, Gaia DR3 1680452683804651520, PM J12429+6542, MUSR 39, GALEX J124258.3+654219, PSO J190.7423+65.7050, USNO-B1.0 1557-00144114, TIC 355896647
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Blouin et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 42 58.13 (0.06) | 12 42 58.14 (0.07) | 12 42 58.13 | 12 42 58.40 (0.06) | 12 42 58.14 | ||||||||||
| Declination | 65 42 17.94 (0.06) | 65 42 18.00 (0.07) | 65 42 17.94 | 65 42 19.95 (0.06) | 65 42 18.00 | ||||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | ||||||||
| Effective temperature | [K] | 6673.0 (27) | 6622.0 (26) | 6673.0 (27) | 6545.0 (50) | 6559.0 | 6312.0 | 6960.0 (121) | 6796.0 (63) | ||||||
| log(g) | [cgs] | 8.03 (0.009) | 8.01 (0.009) | 8.03 (0.009) | 7.99 (0.02) | 7.99 | 7.86 | 8.85 (0.1) | 8.07 (0.02) | ||||||
| Mass | [M☉] | 0.608 (0.007) | 0.595 (0.008) | 0.606 (0.008) | 0.583 (0.01) | 0.583 | 0.489 | 1.12 (0.07) | 0.634 (0.01) | ||||||
| log(Luminosity) | [L☉] | -4.03 | |||||||||||||
| Cooling age | [Gyr] | 1.8300 | 1.7640 (0.07) | 1.7480 | 1.7040 | ||||||||||
| 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] | 17.70 (0.07) | 17.67 (0.09) | 17.68 (0.09) | 17.67 (0.09) | 17.70 | 17.70 (0.07) | 17.67 (0.09) | |||||||
| Distance | [pc] | 56.49 (0.2) | 56.59 (0.3) | 56.58 (0.3) | 56.58 (0.3) | 33.00 (1) | 56.49 | 56.49 (0.2) | 56.58 (0.3) | ||||||
| Composition | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -102.8986071 (0.08) | -103.017 (0.1) | -106.0 | -102.899 (0.08) | -103.0174983 | |||||||||
| Proper motion (declination) | [mas/yr] | -125.3554983 (0.09) | -125.596 (0.1) | -121.0 | -125.355 (0.09) | -125.5963969 | |||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | |||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | 16.80 | ||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 16.55 (0.1) | 16.55 (0.1) | 16.55 | 16.55 (0.1) | |||||||||||
| H magnitude | 17.14 (0.03) | 17.14 | |||||||||||||
| K magnitude | 16.10 (0.03) | 16.10 | |||||||||||||
| u magnitude | 18.29 (0.01) | 18.29 | 18.26 (0.01) | 18.26 (0.01) | |||||||||||
| g magnitude | 17.66 | 17.65 (0.004) | 17.68 (0.005) | ||||||||||||
| r magnitude | 17.43 | 17.43 (0.006) | 17.43 (0.005) | ||||||||||||
| i magnitude | 17.34 | 17.37 (0.003) | 17.34 (0.006) | ||||||||||||
| z magnitude | 17.35 | 17.39 (0.005) | 17.35 (0.01) | ||||||||||||
| G magnitude | 17.41 (0.008) | 17.43 | 17.41 | 17.41 (0.003) | 17.43 | ||||||||||
| BP magnitude | 17.62 (0.008) | 17.62 | 17.62 | ||||||||||||
| RP magnitude | 17.03 (0.006) | 17.05 | 17.05 | ||||||||||||
| Pan g magnitude | 17.65 (0.004) | 17.65 (0.004) | 17.65 (0.004) | ||||||||||||
| Pan r magnitude | 17.43 (0.005) | 17.43 (0.006) | 17.43 (0.006) | ||||||||||||
| Pan i magnitude | 17.37 (0.003) | 17.37 (0.003) | 17.37 (0.003) | ||||||||||||
| Pan z magnitude | 17.39 (0.004) | 17.39 (0.005) | 17.39 (0.005) | ||||||||||||
| Pan y magnitude | 17.40 (0.01) | 17.40 (0.02) | 17.40 (0.01) | ||||||||||||
| E(B-V) | 0.004 | ||||||||||||||
* 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.