All names: Gaia DR2 6833718925613447936, GALEX J211238.6-183604, Gaia EDR3 6833718513296583424, EC21098-1848, UCAC4 357-196509, 2MASS J21123864-1836037, Gaia DR3 6833718925613447936, EC 21098-1848
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 12 46.51 (0.3) | 21 12 38.67 | 21 12 38.67 (0.07) | ||
| Declination | -18 36 31.28 (0.2) | -18 36 04.32 | -18 36 04.31 (0.05) | ||
| Spectral type | He-sdO | sdOHe | |||
| 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] | 1.30 (0.4) | 0.22 (0.2) | 0.49 (0.09) | |
| Distance | [pc] | 771.13 (262) | 4608.29 (3678) | 2029.63 (384) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -9.654 (0.4) | 23.445 (0.3) | 23.037 (0.1) | |
| Proper motion (declination) | [mas/yr] | -8.629 (0.3) | -17.112 (0.2) | -17.316 (0.07) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 16.69 (0.1) | ||||
| V magnitude | 16.74 (0.01) | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.24 (0.1) | 16.24 (0.1) | |||
| H magnitude | 15.94 (0.2) | 15.94 (0.2) | |||
| K magnitude | 15.57 (0.2) | 15.57 (0.2) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 19.29 (0.004) | 16.59 (0.002) | 16.57 (0.003) | ||
| BP magnitude | 19.22 (0.02) | 16.48 (0.009) | |||
| RP magnitude | 19.39 (0.05) | 16.53 (0.006) | |||
| Pan g magnitude | 16.55 (0.004) | ||||
| Pan r magnitude | 16.75 (0.004) | ||||
| Pan i magnitude | 16.89 (0.002) | ||||
| Pan z magnitude | 16.97 (0.01) | ||||
| Pan y magnitude | 17.03 (0.01) | ||||
| E(B-V) | 0.028 | ||||
* 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.