All names: Gaia EDR3 1921157597558955392, SDSS J234430.64+401335.2, GALEX J234430.5+401335, SDSS J234430.65+401335.3, Gaia DR3 1921157597558955392, SDSS J234430.65+401335.2, Gaia DR2 1921157597558955392
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 44 30.64 (0.06) | 23 44 30.65 | 23 44 30.64 (0.1) | 23 44 30.64 | 23 44 30.64 (0.06) | 23 44 30.65 | ||||
| Declination | 40 13 35.03 (0.06) | 40 13 35.22 | 40 13 35.04 (0.08) | 40 13 35.03 | 40 13 35.27 (0.06) | 40 13 35.26 | ||||
| Spectral type | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 16859.0 (415) | 18687.0 (159) | |||||||
| log(g) | [cgs] | 7.95 (0.03) | 7.89 (0.03) | |||||||
| Mass | [M☉] | 0.589 (0.02) | 0.565 (0.01) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 4.97 (0.1) | 4.90 (0.2) | 4.97 | 4.97 (0.1) | |||||
| Distance | [pc] | 201.21 (4) | 204.08 (7) | 201.21 | 201.21 (4) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 0.62249356 (0.07) | 0.759310159 (0.2) | 0.622 (0.07) | ||||||
| Proper motion (declination) | [mas/yr] | -14.78397994 (0.07) | -15.0925592 (0.1) | -14.784 (0.07) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.61 (0.01) | 17.61 (0.01) | 17.63 (0.02) | |||||||
| g magnitude | 17.42 (0.005) | 17.42 (0.005) | 17.44 (0.01) | |||||||
| r magnitude | 17.75 (0.006) | 17.75 (0.006) | 17.78 (0.01) | |||||||
| i magnitude | 18.01 (0.008) | 18.00 (0.008) | 18.00 (0.01) | |||||||
| z magnitude | 18.24 (0.02) | 18.24 (0.02) | 18.28 (0.03) | |||||||
| G magnitude | 17.59 (0.006) | 17.61 | 17.59 | 17.59 (0.003) | ||||||
| BP magnitude | 17.54 (0.006) | 17.54 | ||||||||
| RP magnitude | 17.72 (0.01) | 17.71 | ||||||||
| Pan g magnitude | 17.46 (0.01) | |||||||||
| Pan r magnitude | 17.75 (0.004) | |||||||||
| Pan i magnitude | 18.02 (0.003) | |||||||||
| Pan z magnitude | 18.26 (0.009) | |||||||||
| Pan y magnitude | 18.40 (0.02) | |||||||||
| E(B-V) | 0.044 | |||||||||
* 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.