All names: Gaia DR3 4560194720667590016, SDSS J170021.47+175042.9, SDSS J170021.48+175043.0, WD 1658+179, GALEX J170021.4+175043, Gaia EDR3 4560194720667590016, Gaia DR2 4560194720667590016
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 00 21.47 (0.4) | 17 00 21.48 | 17 00 21.47 (0.6) | 17 00 21.47 (0.4) | 17 00 21.48 | 17 00 20.98 | 17 00 21.48 | |||
| Declination | 17 50 42.87 (0.4) | 17 50 42.96 | 17 50 42.87 (0.5) | 17 50 42.91 (0.4) | 17 50 42.96 | 17 50 37.32 | 17 50 42.96 | |||
| Spectral type | DA | DA_auto | DA | DAH | DA | |||||
| Effective temperature | [K] | 35795.0 (2288) | 33311.0 (2070) | |||||||
| log(g) | [cgs] | 8.25 (0.4) | 8.27 (0.4) | |||||||
| Mass | [M☉] | |||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 1.41 (0.7) | 1.14 (0.9) | 1.41 (0.7) | ||||||
| Distance | [pc] | 708.94 (359) | 874.31 (690) | 708.92 (359) | ||||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -5.611553327 (0.5) | -4.301907236 (1) | -5.612 (0.5) | 1.3 | |||||
| Proper motion (declination) | [mas/yr] | -2.523537539 (0.6) | -2.190068574 (1) | -2.524 (0.6) | -2.1 | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 20.10 (0.04) | 20.10 (0.04) | 20.08 (0.04) | 20.08 | 20.09 (0.04) | |||||
| g magnitude | 20.28 (0.02) | 20.28 (0.02) | 20.29 (0.02) | 20.29 | 20.30 (0.02) | |||||
| r magnitude | 20.73 (0.03) | 20.73 (0.03) | 20.73 (0.03) | 20.73 | 20.73 (0.03) | |||||
| i magnitude | 21.12 (0.06) | 21.12 (0.06) | 21.07 (0.06) | 21.07 | 21.08 (0.06) | |||||
| z magnitude | 21.88 (0.4) | 21.88 (0.4) | 21.95 (0.5) | 21.95 | 21.97 (0.5) | |||||
| G magnitude | 20.50 (0.06) | 20.60 | 20.50 (0.007) | |||||||
| BP magnitude | 20.43 (0.06) | 20.27 | ||||||||
| RP magnitude | 20.68 (0.1) | 20.37 | ||||||||
| Pan g magnitude | ||||||||||
| Pan r magnitude | ||||||||||
| Pan i magnitude | ||||||||||
| Pan z magnitude | ||||||||||
| Pan y magnitude | ||||||||||
| E(B-V) | 0.061 | |||||||||
* 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.