All names: GALEX J164204.4+440303, SDSSJ164204.37+440303.2, Gaia EDR3 1405730362052587392, TIC 115281121, SDSS J164204.37+440303.2, Gaia DR2 1405730362050842496, 2MASS J16420434+4403033, SDSS J164204.38+440303.2
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 42 04.39 (0.1) | 16 42 04.38 | 16 42 04.37 | 16 42 04.39 (0.3) | 16 42 04.39 (0.3) | 16 42 04.38 | |||
| Declination | 44 03 02.95 (0.2) | 44 03 03.24 | 44 03 03.20 | 44 03 02.96 (0.8) | 44 03 02.96 (0.8) | 44 03 03.23 | |||
| Spectral type | sdB | sdB | SDB | ||||||
| Effective temperature | [K] | 29300.0 (800) | 7388.0 (22) | ||||||
| log(g) | [cgs] | 5.09 (0.1) | 7.18 (0.06) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.26 (0.1) | |||||||
| Distance | [pc] | 3836.45 (2203) | |||||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -2.766970267 (0.1) | -0.0 (3) | 0.7 | |||||
| Proper motion (declination) | [mas/yr] | -18.86255874 (0.3) | -16.0 (3) | -15.6 | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.34 (0.1) | 16.34 (0.1) | |||||||
| H magnitude | 16.02 (0.2) | 16.02 (0.2) | |||||||
| K magnitude | 16.51 | ||||||||
| u magnitude | 16.77 (0.006) | 16.77 (0.006) | 16.77 (0.006) | 16.79 (0.02) | |||||
| g magnitude | 16.65 (0.004) | 16.64 (0.004) | 16.64 (0.004) | 16.68 (0.02) | |||||
| r magnitude | 16.82 (0.004) | 16.82 (0.004) | 16.82 (0.004) | 16.87 (0.02) | |||||
| i magnitude | 16.91 (0.005) | 16.91 (0.005) | 16.91 (0.005) | 16.95 (0.02) | |||||
| z magnitude | 17.00 (0.01) | 17.00 (0.01) | 16.98 (0.01) | 17.02 (0.02) | |||||
| G magnitude | 17.40 (0.005) | 17.23 (0.01) | 17.23 | 17.23 (0.01) | |||||
| BP magnitude | 16.76 (0.005) | 16.70 (0.01) | 16.70 | ||||||
| RP magnitude | 16.61 (0.006) | 16.62 (0.02) | 16.62 | ||||||
| Pan g magnitude | 16.77 (0.004) | 16.77 (0.004) | |||||||
| Pan r magnitude | 16.89 (0.007) | 16.89 (0.007) | |||||||
| Pan i magnitude | 16.98 (0.004) | 16.98 (0.004) | |||||||
| Pan z magnitude | 17.05 (0.005) | 17.05 (0.005) | |||||||
| Pan y magnitude | 17.11 (0.01) | 17.11 (0.01) | |||||||
| E(B-V) | 0.020 | ||||||||
* 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.