All names: SDSS J124236.77+171817.03, Gaia DR3 3935281450161118080, Gaia EDR3 3935281450161118080, SDSS J124236.76+171817.0, SDSS J124236.78+171817.0, GALEX J124236.7+171817, SDSS J124236.77+171817.0, Gaia DR2 3935281450161118080
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 42 36.75 (0.08) | 12 42 36.78 | 12 42 36.75 (0.1) | 12 42 36.75 | 12 42 36.80 (0.08) | |||||
| Declination | 17 18 16.92 (0.05) | 17 18 17.00 | 17 18 16.93 (0.08) | 17 18 16.92 | 17 18 16.99 (0.05) | |||||
| Spectral type | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 19286.0 (79) | 18062.0 (503) | |||||||
| log(g) | [cgs] | 8.60 (0.01) | 8.51 (0.03) | |||||||
| Mass | [M☉] | 0.974 (0.005) | 0.938 (0.02) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 7.67 (0.1) | 7.52 (0.1) | 7.67 | 7.67 (0.1) | |||||
| Distance | [pc] | 130.42 (2) | 133.04 (2) | 130.42 | 130.42 (2) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -40.95457312 (0.1) | -40.77786113 (0.2) | -40.955 (0.1) | ||||||
| Proper motion (declination) | [mas/yr] | -3.917779616 (0.1) | -3.99327698 (0.1) | -3.918 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.28 (0.009) | 17.27 (0.02) | 17.28 (0.009) | |||||||
| g magnitude | 17.20 (0.005) | 17.22 (0.01) | 17.20 (0.005) | |||||||
| r magnitude | 17.52 (0.006) | 17.53 (0.02) | 17.52 (0.006) | |||||||
| i magnitude | 17.80 (0.008) | 17.81 (0.02) | 17.80 (0.008) | |||||||
| z magnitude | 18.10 (0.02) | 18.11 (0.03) | 18.10 (0.02) | |||||||
| G magnitude | 17.38 (0.009) | 17.40 | 17.38 | 17.38 (0.003) | ||||||
| BP magnitude | 17.33 (0.009) | 17.32 | ||||||||
| RP magnitude | 17.56 (0.01) | 17.55 | ||||||||
| Pan g magnitude | 17.23 (0.006) | |||||||||
| Pan r magnitude | 17.53 (0.007) | |||||||||
| Pan i magnitude | 17.83 (0.003) | |||||||||
| Pan z magnitude | 18.07 (0.01) | |||||||||
| Pan y magnitude | 18.23 (0.02) | |||||||||
| E(B-V) | 0.011 | |||||||||
* 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.