All names: WDJ091828.50+242823.28, SDSS J091828.42+242823.4, Gaia EDR3 687576710212105856, USNO-B1.0 1144-00166794, SDSS J091828.41+242823.3, LSPM J0918+2428, WDJ091828.5+242823.27, Gaia DR3 687576710212105856, Gaia DR2 687576710212105856
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 18 28.25 (0.3) | 09 18 28.26 | 09 18 28.25 | 09 18 28.49 (0.3) | 09 18 28.26 | |||
| Declination | 24 28 23.66 (0.2) | 24 28 23.65 | 24 28 23.66 | 24 28 23.30 (0.2) | 24 28 23.65 | |||
| Spectral type | DZ: | DZ | ||||||
| Effective temperature | [K] | 4657.0 (78) | ||||||
| log(g) | [cgs] | 7.86 (0.06) | ||||||
| Mass | [M☉] | 0.486 (0.05) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 13.37 (0.4) | 12.30 (0.6) | 13.37 | 13.37 (0.4) | 12.30 (0.6) | ||
| Distance | [pc] | 74.82 (2) | 81.32 (4) | 74.82 | 74.82 (2) | 81.32 (4) | ||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -207.3876231 (0.4) | -208.1458142 (0.8) | -207.388 (0.4) | -208.1458142 | |||
| Proper motion (declination) | [mas/yr] | 22.52314404 (0.3) | 23.89698646 (0.5) | 22.523 (0.3) | 23.89698646 | |||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 19.90 | |||||||
| V magnitude | ||||||||
| R magnitude | 19.20 | |||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 22.11 (0.2) | 22.11 (0.2) | ||||||
| g magnitude | 20.07 (0.02) | 20.07 (0.02) | ||||||
| r magnitude | 19.26 (0.01) | 19.26 (0.01) | ||||||
| i magnitude | 18.95 (0.01) | 18.95 (0.01) | ||||||
| z magnitude | 18.89 (0.05) | 18.89 (0.05) | ||||||
| G magnitude | 19.30 (0.04) | 19.33 | 19.30 | 19.30 (0.004) | 19.33 | |||
| BP magnitude | 19.90 (0.04) | 19.84 | 19.84 | |||||
| RP magnitude | 18.62 (0.03) | 18.56 | 18.56 | |||||
| Pan g magnitude | 19.97 (0.008) | |||||||
| Pan r magnitude | 19.25 (0.006) | |||||||
| Pan i magnitude | 18.95 (0.006) | |||||||
| Pan z magnitude | 18.86 (0.01) | |||||||
| Pan y magnitude | 18.93 (0.009) | |||||||
| E(B-V) | 0.003 | |||||||
* 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.