All names: USNO-B1.0 1047-00628222, LAMOST J220403.78+144638.2, Gaia DR3 1768493259900525312, SDSS J220403.79+144638.2, PG2201+145, GALEX J220403.8+144638, Gaia DR2 1768493259900525312, Gaia EDR3 1768493259900525312, UCAC4 524-144644, PG 2201+145
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 04 03.79 (0.04) | 22 04 03.79 | 22 04 03.79 (0.04) | ||
| Declination | 14 46 38.15 (0.05) | 14 46 38.54 | 14 46 38.27 (0.05) | ||
| Spectral type | He-sdO | sdOB | |||
| Effective temperature | [K] | 45227.0 (158) | |||
| log(g) | [cgs] | 5.97 (0.03) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.60 (0.05) | 0.48 (0.07) | 0.60 (0.05) | |
| Distance | [pc] | 1668.89 (135) | 2091.61 (311) | 1668.89 (135) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 0.111 (0.06) | 0.189 (0.1) | 0.111 (0.06) | |
| Proper motion (declination) | [mas/yr] | -7.95 (0.06) | -8.182 (0.1) | -7.95 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.20 | ||||
| V magnitude | |||||
| R magnitude | 15.81 (0.06) | ||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 15.15 (0.005) | ||||
| g magnitude | 15.53 (0.003) | ||||
| r magnitude | 16.02 (0.004) | ||||
| i magnitude | 16.36 (0.005) | ||||
| z magnitude | 16.66 (0.01) | ||||
| G magnitude | 15.78 (0.003) | 15.79 (0.001) | 15.78 (0.003) | ||
| BP magnitude | 15.63 (0.006) | 15.56 (0.01) | |||
| RP magnitude | 16.05 (0.007) | 16.05 (0.005) | |||
| Pan g magnitude | 15.64 (0.003) | ||||
| Pan r magnitude | 16.04 (0.003) | ||||
| Pan i magnitude | 16.39 (0.003) | ||||
| Pan z magnitude | 16.66 (0.003) | ||||
| Pan y magnitude | 16.86 (0.008) | ||||
| E(B-V) | 0.043 | ||||
* 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.