All names: Gaia DR2 4564039545329170816, SDSS J164525.28+205132.3, TIC 345397664, SDSS J164525.27+205132.3, 2MASS J16452527+2051325, Gaia EDR3 4564039545329170816, PG1643+209, GALEX J164525.3+205132, Gaia DR3 4564039545329170816, SDSS J164525.28+205132.33, UCAC4 555-056841, PG 1643+209
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 45 25.28 (0.03) | 16 45 25.28 | 16 45 25.29 | 16 45 25.28 (0.04) | 16 45 25.28 (0.03) | ||||
| Declination | 20 51 32.31 (0.03) | 20 51 32.30 | 20 51 32.33 | 20 51 32.31 (0.04) | 20 51 32.30 (0.03) | ||||
| Spectral type | sdB | sdB | sdB | ||||||
| Effective temperature | [K] | 30200.0 (1000) | 28331.0 (96) | ||||||
| log(g) | [cgs] | 5.62 (0.1) | 5.00 (0) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.41 (0.04) | 0.54 (0.06) | 0.54 (0.06) | 0.41 (0.04) | ||||
| Distance | [pc] | 2414.86 (250) | 1846.04 (200) | 1846.08 (200) | 2414.88 (250) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -5.637504665 (0.04) | -5.659 (0.08) | -5.658962327 (0.08) | -5.638 (0.04) | ||||
| Proper motion (declination) | [mas/yr] | 0.867578136 (0.04) | 0.692 (0.1) | 0.691550773 (0.1) | 0.868 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.50 (0.01) | ||||||||
| V magnitude | 15.90 (0.01) | ||||||||
| R magnitude | 16.41 (0.04) | ||||||||
| I magnitude | |||||||||
| J magnitude | 16.40 (0.1) | 16.40 (0.1) | |||||||
| H magnitude | 16.46 (0.3) | 16.46 (0.3) | |||||||
| K magnitude | 15.76 | ||||||||
| u magnitude | 15.47 (0.005) | 15.47 (0.005) | 15.47 (0.01) | 15.47 (0.005) | |||||
| g magnitude | 15.57 (0.003) | 15.57 (0.003) | 15.57 (0.01) | 15.57 (0.003) | |||||
| r magnitude | 16.03 (0.004) | 16.03 (0.004) | 16.02 (0.01) | 16.03 (0.004) | |||||
| i magnitude | 16.34 (0.005) | 16.34 (0.005) | 16.33 (0.01) | 16.34 (0.005) | |||||
| z magnitude | 16.65 (0.009) | 16.65 (0.009) | 16.65 (0.02) | 16.65 (0.009) | |||||
| G magnitude | 15.82 (0.002) | 15.83 (0.0007) | 15.83 | 15.82 (0.003) | |||||
| BP magnitude | 15.70 (0.002) | 15.64 (0.007) | 15.64 | ||||||
| RP magnitude | 16.04 (0.003) | 16.04 (0.005) | 16.04 | ||||||
| Pan g magnitude | 15.66 (0.001) | 15.66 (0.001) | |||||||
| Pan r magnitude | 16.05 (0.005) | 16.05 (0.005) | |||||||
| Pan i magnitude | 16.37 (0.002) | 16.37 (0.002) | |||||||
| Pan z magnitude | 16.63 (0.003) | 16.63 (0.003) | |||||||
| Pan y magnitude | 16.80 (0.01) | 16.80 (0.01) | |||||||
| E(B-V) | 0.044 | ||||||||
* 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.