All names: WD 1816+667, Gaia DR2 2257685194490203264, Gaia EDR3 2257685194490203264, KUV 18169+6643, Gaia DR3 2257685194490203264, GALEX J181651.5+664412, USNO-B1.0 1567-00188322, KUV18169+6643
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|
| Right ascension | 18 16 51.33 (0.05) | 18 16 51.36 | 18 16 51.33 (0.06) | 18 16 51.33 (0.05) | 18 16 52.90 | ||
| Declination | 66 44 12.54 (0.05) | 66 44 12.81 | 66 44 12.54 (0.07) | 66 44 12.60 (0.05) | 66 44 13.92 | ||
| Spectral type | sdOB | sdOB | DB | ||||
| Effective temperature | [K] | ||||||
| log(g) | [cgs] | ||||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | 0.25 (0.05) | 0.27 (0.06) | 0.27 (0.06) | 0.25 (0.05) | ||
| Distance | [pc] | 3969.45 (782) | 3723.01 (844) | 3723.01 (844) | 3969.83 (782) | ||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | 1.33243225 (0.08) | 1.044 (0.1) | 1.044 (0.1) | 1.332 (0.08) | ||
| Proper motion (declination) | [mas/yr] | -3.702962186 (0.06) | -3.758 (0.1) | -3.758 (0.1) | -3.703 (0.06) | ||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | 16.40 | ||||||
| V magnitude | |||||||
| R magnitude | 17.20 | ||||||
| I magnitude | |||||||
| J magnitude | |||||||
| H magnitude | |||||||
| K magnitude | |||||||
| u magnitude | |||||||
| g magnitude | |||||||
| r magnitude | |||||||
| i magnitude | |||||||
| z magnitude | |||||||
| G magnitude | 16.65 (0.002) | 16.68 (0.001) | 16.68 | 16.65 (0.003) | |||
| BP magnitude | 16.50 (0.002) | 16.42 (0.003) | 16.42 | ||||
| RP magnitude | 16.94 (0.004) | 16.92 (0.003) | 16.92 | ||||
| Pan g magnitude | 16.51 (0.003) | ||||||
| Pan r magnitude | 16.91 (0.002) | ||||||
| Pan i magnitude | 17.26 (0.002) | ||||||
| Pan z magnitude | 17.55 (0.008) | ||||||
| Pan y magnitude | 17.75 (0.01) | ||||||
| E(B-V) | 0.036 | ||||||
* 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.