All names: GALEX J213852.7+184015, TIC 367508287, Gaia EDR3 1786272401577220096, SDSS J213852.84+184015.7, 2MASS J21385283+1840157, GALEXJ21388+1840, UCAC4 544-139899, Gaia DR2 1786272195418292992, GALEX J213852.8+184014, GALEX J213852.8+184015, Gaia DR3 1786272195418292992, UCAC2 38536544
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 38 47.95 (0.6) | 21 38 52.81 | 21 38 52.85 (0.03) | ||
| Declination | 18 41 04.10 (0.7) | 18 40 15.16 | 18 40 15.76 (0.03) | ||
| Spectral type | sdO | sdO | |||
| 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] | 6.37 (0.8) | 0.79 (0.08) | 0.70 (0.04) | |
| Distance | [pc] | 157.02 (20) | 1263.58 (125) | 1431.23 (82) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -31.155 (0.7) | -3.168 (0.1) | -3.284 (0.04) | |
| Proper motion (declination) | [mas/yr] | 1.079 (0.8) | -12.443 (0.1) | -12.672 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 12.79 (0.01) | ||||
| V magnitude | 12.97 (0.01) | ||||
| R magnitude | 13.23 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 13.37 (0.03) | 13.37 (0.03) | |||
| H magnitude | 13.49 (0.03) | 13.49 (0.03) | |||
| K magnitude | 13.53 (0.04) | 13.53 (0.04) | |||
| u magnitude | 13.92 (0.01) | ||||
| g magnitude | 13.01 (0.002) | 12.78 (0.06) | |||
| r magnitude | 13.15 (0.06) | ||||
| i magnitude | 13.52 (0.005) | 13.43 (0.2) | |||
| z magnitude | 14.36 (0.007) | ||||
| G magnitude | 20.35 (0.008) | 12.94 (0.001) | 12.92 (0.003) | ||
| BP magnitude | 20.49 (0.2) | 12.78 (0.01) | |||
| RP magnitude | 19.79 (0.1) | 13.10 (0.003) | |||
| Pan g magnitude | 12.64 | ||||
| Pan r magnitude | 13.07 | ||||
| Pan i magnitude | 13.41 | ||||
| Pan z magnitude | 13.70 (0.004) | ||||
| Pan y magnitude | 13.84 (0.003) | ||||
| E(B-V) | 0.061 | ||||
* 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.