All names: GALEX J211832.4+233416, Gaia DR2 1792255325381143040, 2MASS J21183240+2334172, UCAC4 568-123005, LAMOST J211832.42+233417.4, LAMOSTJ211832.42+233417.4, Gaia DR3 1792255325381143040
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 18 32.42 | 21 18 32.42 (0.03) | ||
| Declination | 23 34 17.46 | 23 34 17.43 (0.03) | ||
| Spectral type | He-sdO | sdOBHe | ||
| Effective temperature | [K] | 46143.0 (196) | ||
| log(g) | [cgs] | 5.84 (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 (0.08) | 0.51 (0.03) | |
| Distance | [pc] | 1652.89 (206) | 1977.07 (124) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -5.721 (0.2) | -5.832 (0.04) | |
| Proper motion (declination) | [mas/yr] | -8.088 (0.2) | -8.042 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.51 (0.01) | |||
| V magnitude | 14.70 (0.01) | |||
| R magnitude | 14.98 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.22 (0.04) | 15.22 (0.04) | ||
| H magnitude | 15.35 (0.1) | 15.35 (0.1) | ||
| K magnitude | 15.32 (0.2) | 15.32 (0.2) | ||
| u magnitude | ||||
| g magnitude | 14.46 (0.01) | |||
| r magnitude | 14.87 (0.01) | |||
| i magnitude | 15.33 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.67 (0.0008) | 14.65 (0.003) | ||
| BP magnitude | 14.48 (0.01) | |||
| RP magnitude | 14.85 (0.002) | |||
| Pan g magnitude | 14.53 (0.004) | |||
| Pan r magnitude | 14.88 (0.001) | |||
| Pan i magnitude | 15.19 (0.002) | |||
| Pan z magnitude | 15.46 (0.002) | |||
| Pan y magnitude | 15.63 (0.004) | |||
| E(B-V) | 0.082 | |||
* 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.