All names: SDSS J055542.08+640812.5, FBS B 641, FBS 0550+641, Gaia DR3 287018271958898560, GALEX J055542.0+640812, GALEX J055542.1+640810, Gaia DR2 287018271958898560, Gaia EDR3 287017408668201344, TIC 416457706, 2MASS J05554207+6408125, GALEXJ05557+6408
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 05 55 36.18 (0.4) | 05 55 42.17 | 05 55 42.09 (0.01) | ||
| Declination | 64 06 39.90 (0.4) | 64 08 10.19 | 64 08 12.58 (0.02) | ||
| Spectral type | sdO | sdO | |||
| Effective temperature | [K] | 45600.0 (3380) | |||
| log(g) | [cgs] | 5.73 (0.4) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 2.31 (0.7) | 1.99 (0.05) | 1.92 (0.02) | |
| Distance | [pc] | 432.23 (135) | 503.75 (12) | 521.81 (7) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -6.477 (0.5) | 11.756 (0.05) | 11.595 (0.02) | |
| Proper motion (declination) | [mas/yr] | -2.187 (0.5) | -10.027 (0.06) | -10.004 (0.02) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | 13.33 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 13.71 (0.03) | 13.71 (0.03) | |||
| H magnitude | 13.81 (0.04) | 13.81 (0.04) | |||
| K magnitude | 13.90 (0.04) | 13.90 (0.04) | |||
| u magnitude | 15.27 (0.02) | ||||
| g magnitude | |||||
| r magnitude | 16.14 (0.01) | ||||
| i magnitude | 15.44 (0.02) | ||||
| z magnitude | 14.51 (0.009) | ||||
| G magnitude | 20.44 (0.006) | 13.25 (0.0005) | 13.24 (0.003) | ||
| BP magnitude | 20.46 (0.08) | 13.08 (0.005) | |||
| RP magnitude | 20.33 (0.09) | 13.38 (0.001) | |||
| Pan g magnitude | 13.18 | ||||
| Pan r magnitude | 13.42 (0.001) | ||||
| Pan i magnitude | 13.73 (0.007) | ||||
| Pan z magnitude | 13.97 (0.003) | ||||
| Pan y magnitude | 14.11 (0.002) | ||||
| E(B-V) | 0.102 | ||||
* 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.