All names: 2MASS J18052062+2256084, WDJ180520.64+225608.40, SDSS J180520.65+225608.40, Gaia EDR3 4576767766817282688, SDSS J180520.65+225608.4, TIC 135438582, Gaia DR2 4576767766817282688, SDSS J180520.65+225608.3, Gaia DR3 4576767766817282688
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | MWDD H | MWDD HE | Gaia DR2 | Stilism | Koester & Kepler 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 05 20.65 (0.02) | 18 05 20.65 | 18 05 20.65 (0.03) | 18 05 20.65 | 18 05 20.64 (0.02) | 18 05 20.65 | 18 05 20.65 | |||||||||
| Declination | 22 56 08.25 (0.04) | 22 56 08.38 | 22 56 08.25 (0.06) | 22 56 08.25 | 22 56 08.41 (0.04) | 22 56 08.25 | 22 56 08.35 | |||||||||
| Spectral type | DB | DBA | DBA | DB | ||||||||||||
| Effective temperature | [K] | 12892.0 | 11850.0 | 10882.0 | 11354.0 | 12618.0 (42) | 11610.0 (100) | 13938.0 (119) | ||||||||
| log(g) | [cgs] | 8.05 | 8.01 | 7.96 | 7.95 | 8.00 (0) | 7.98 (0.01) | 9.02 (0.07) | ||||||||
| Mass | [M☉] | 0.617 | 0.591 | 0.582 | 0.551 | 0.573 (0.009) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||||||
| Cooling age | [Gyr] | 0.4612 | 0.4121 | |||||||||||||
| log(H/He) | -5.026 | -4.86 (0.06) | ||||||||||||||
| log(C/He) | ||||||||||||||||
| log(Ca/He) | <-10.09 | |||||||||||||||
| log(Ca/H) | ||||||||||||||||
| Parallax | [mas] | 11.49 (0.04) | 11.46 (0.06) | 11.49 | 11.49 (0.04) | 11.46 (0.06) | ||||||||||
| Distance | [pc] | 87.01 (0.3) | 87.27 (0.5) | 90.00 | 87.01 | 87.01 (0.3) | 87.27 (0.5) | |||||||||
| Composition | ||||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 7.403023623 (0.03) | 7.280538065 (0.07) | 7.403 (0.03) | 7.280538065 | |||||||||||
| Proper motion (declination) | [mas/yr] | -9.83470296 (0.05) | -9.74980528 (0.1) | -9.835 (0.05) | -9.749805279 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | ||||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | ||||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 16.70 (0.1) | |||||||||||||||
| H magnitude | ||||||||||||||||
| K magnitude | ||||||||||||||||
| u magnitude | 16.50 (0.006) | 16.50 (0.006) | 16.50 (0.006) | 16.49 (0.02) | ||||||||||||
| g magnitude | 16.45 (0.004) | 16.45 (0.004) | 16.45 (0.004) | 16.45 (0.01) | ||||||||||||
| r magnitude | 16.67 (0.004) | 16.67 (0.004) | 16.67 (0.004) | 16.69 (0.01) | ||||||||||||
| i magnitude | 16.83 (0.005) | 16.83 (0.005) | 16.83 (0.005) | 16.84 (0.01) | ||||||||||||
| z magnitude | 17.05 (0.01) | 17.05 (0.01) | 17.05 (0.01) | 17.05 (0.02) | ||||||||||||
| G magnitude | 16.54 (0.003) | 16.57 | 16.54 | 16.54 (0.003) | 16.57 | |||||||||||
| BP magnitude | 16.55 (0.003) | 16.53 | 16.53 | |||||||||||||
| RP magnitude | 16.53 (0.004) | 16.53 | 16.53 | |||||||||||||
| Pan g magnitude | 16.52 (0.006) | |||||||||||||||
| Pan r magnitude | 16.68 (0.002) | |||||||||||||||
| Pan i magnitude | 16.86 (0.003) | |||||||||||||||
| Pan z magnitude | 17.03 (0.004) | |||||||||||||||
| Pan y magnitude | 17.17 (0.009) | |||||||||||||||
| E(B-V) | 0.024 | |||||||||||||||
* 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.