All names: Gaia DR3 2256427005291588864, SDSS J183317.73+642737.1, Gaia EDR3 2256427005291588864, Gaia DR2 2256427005291588864, SDSSJ183317.70+642737.0, GALEX J183317.7+642737, SDSS J183317.70+642737.0
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 33 17.70 (0.07) | 18 33 17.70 | 18 33 17.71 (0.07) | ||
| Declination | 64 27 37.05 (0.07) | 64 27 37.01 | 64 27 37.06 (0.07) | ||
| Spectral type | He-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] | 0.44 (0.07) | 0.41 (0.1) | 0.44 (0.07) | |
| Distance | [pc] | 2251.24 (356) | 2448.58 (703) | 2251.24 (356) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.708 (0.09) | -4.639 (0.2) | -4.708 (0.09) | |
| Proper motion (declination) | [mas/yr] | -0.93 (0.09) | -1.118 (0.3) | -0.93 (0.09) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 17.14 (0.009) | 17.14 (0.009) | |||
| g magnitude | 17.42 (0.005) | 17.42 (0.005) | |||
| r magnitude | 17.87 (0.006) | 17.87 (0.006) | |||
| i magnitude | 18.22 (0.008) | 18.22 (0.008) | |||
| z magnitude | 18.48 (0.03) | 18.48 (0.03) | |||
| G magnitude | 17.64 (0.003) | 17.67 (0.002) | 17.64 (0.003) | ||
| BP magnitude | 17.52 (0.008) | 17.43 (0.009) | |||
| RP magnitude | 17.88 (0.02) | 17.87 (0.02) | |||
| Pan g magnitude | 17.49 (0.003) | ||||
| Pan r magnitude | 17.88 (0.005) | ||||
| Pan i magnitude | 18.23 (0.004) | ||||
| Pan z magnitude | 18.48 (0.01) | ||||
| Pan y magnitude | 18.68 (0.03) | ||||
| E(B-V) | 0.038 | ||||
* 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.