All names: Gaia DR2 607478387644308736, SDSS J091218.47+150334.45, SDSS J091218.47+150334.4, SDSS J091218.46+150334.4, Gaia EDR3 607478387644308736, Gaia DR3 607478387644308736, GALEX J091218.4+150335
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | SDSS DR10 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 12 18.45 (0.2) | 09 12 18.47 | 09 12 18.47 | 09 12 18.45 (0.3) | 09 12 18.47 | 09 12 18.48 (0.2) | ||||
| Declination | 15 03 34.76 (0.1) | 15 03 34.40 | 15 03 34.40 | 15 03 34.75 (0.2) | 15 03 34.45 | 15 03 34.33 (0.1) | ||||
| Spectral type | WD+MS | DA | DA | DA+MS | ||||||
| Effective temperature | [K] | 19640.0 (558) | 21586.0 (337) | |||||||
| log(g) | [cgs] | 7.76 (0.1) | 7.78 (0.05) | |||||||
| Mass | [M☉] | 0.5 (0.05) | 0.525 (0.01) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 2.63 (0.3) | 2.84 (0.4) | 2.63 (0.3) | ||||||
| Distance | [pc] | 379.76 (37) | 352.60 (44) | 571.00 (39) | 379.75 (37) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -30.55400603 (0.3) | -30.44012405 (0.5) | -30.554 (0.3) | ||||||
| Proper motion (declination) | [mas/yr] | 27.16689486 (0.2) | 27.91948708 (0.4) | 27.167 (0.2) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | WDMS | ||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 18.85 (0.02) | 18.85 (0.02) | 18.83 | 18.83 (0.03) | 18.85 (0.02) | |||||
| g magnitude | 18.77 (0.009) | 18.77 (0.009) | 18.80 | 18.80 (0.05) | 18.77 (0.009) | |||||
| r magnitude | 19.21 (0.01) | 19.21 (0.01) | 19.20 | 19.20 (0.2) | 19.21 (0.01) | |||||
| i magnitude | 20.21 (0.04) | 20.21 (0.04) | 20.18 | 20.18 (2) | 20.21 (0.04) | |||||
| z magnitude | 21.86 (0.4) | 21.86 (0.4) | 21.88 | 21.88 (2) | 21.86 (0.4) | |||||
| G magnitude | 18.91 (0.06) | 18.94 | 18.91 (0.004) | |||||||
| BP magnitude | 18.88 (0.06) | 18.74 | ||||||||
| RP magnitude | 18.98 (0.08) | 18.93 | ||||||||
| Pan g magnitude | ||||||||||
| Pan r magnitude | ||||||||||
| Pan i magnitude | ||||||||||
| Pan z magnitude | ||||||||||
| Pan y magnitude | ||||||||||
| E(B-V) | 0.026 | |||||||||
* 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.