All names: Gaia DR3 3905335598144227200, SDSS J122048.65+091412.2, SDSS J122048.65+091412.1, Gaia EDR3 3905335598144227200, WD 1218+095, J1220+0914, 1218+095, Gaia DR2 3905335598144227200, WDJ122048.70+091413.08
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | O'Brien et al. 2024 | Bergeron et al. 2022 | Leggett et al. 2018 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 20 48.33 (0.3) | 12 20 48.66 | 12 20 48.33 (0.3) | 12 20 48.70 (0.3) | 12 20 47.81 | |||||||
| Declination | 09 14 06.87 (0.2) | 09 14 12.30 | 09 14 06.87 (0.2) | 09 14 13.08 (0.2) | 09 14 09.60 | |||||||
| Spectral type | DC | DC | DC14.3 | DC | DC | DC | ||||||
| Effective temperature | [K] | 3890.0 (60) | 3531.0 (37) | |||||||||
| log(g) | [cgs] | 8.49 (0.04) | ||||||||||
| Mass | [M☉] | 1.081 (0.008) | 0.893 (0.03) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 6.6680 | 8.5350 (0.2) | |||||||||
| log(H/He) | -1.14 | |||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 26.68 (0.3) | 26.68 (0.3) | 24.94 (0.7) | 26.68 (0.3) | 26.68 (0.3) | ||||||
| Distance | [pc] | 37.48 (0.5) | 37.48 (0.5) | 40.10 (1) | 37.48 (0.5) | 37.48 (0.5) | ||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -346.176 (0.5) | -346.1761392 (0.5) | -346.176 (0.5) | ||||||||
| Proper motion (declination) | [mas/yr] | -388.232 (0.3) | -388.23249 (0.3) | -388.232 (0.3) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 20.90 (0.06) | |||||||||||
| V magnitude | 19.67 (0.03) | |||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 19.97 (0.07) | |||||||||||
| H magnitude | 20.68 (0.07) | |||||||||||
| K magnitude | ||||||||||||
| u magnitude | 22.53 (0.3) | 22.42 (0.4) | 22.40 | |||||||||
| g magnitude | 20.35 (0.02) | 20.34 (0.02) | 20.35 | |||||||||
| r magnitude | 19.33 (0.01) | 19.32 (0.01) | 19.34 | |||||||||
| i magnitude | 19.45 (0.02) | 19.45 (0.02) | 19.42 | |||||||||
| z magnitude | 19.89 (0.09) | 19.88 (0.09) | 19.89 | |||||||||
| G magnitude | 19.60 (0.005) | 19.60 | 19.60 (0.005) | |||||||||
| BP magnitude | 20.03 (0.07) | 20.03 | ||||||||||
| RP magnitude | 19.16 (0.06) | 19.16 | ||||||||||
| Pan g magnitude | 20.19 (0.01) | |||||||||||
| Pan r magnitude | 19.32 (0.007) | |||||||||||
| Pan i magnitude | 19.47 (0.01) | |||||||||||
| Pan z magnitude | 19.74 (0.03) | |||||||||||
| Pan y magnitude | 20.01 (0.05) | |||||||||||
| E(B-V) | 0.001 | |||||||||||
* 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.