All names: TIC 2028801903, PHL 231, TIC 471013668, GALEX J222112.9-201117, Gaia DR3 6820980881541729024, Gaia DR2 6820980881541729024, HE 2218-2026, EC 22184-2026, HE2218-2026
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 21 13.02 | 22 21 13.00 (0.05) | ||
| Declination | -20 11 17.60 | -20 11 17.21 (0.05) | ||
| Spectral type | He-sdOB | sdOHe | ||
| Effective temperature | [K] | 38330.0 (1000) | ||
| log(g) | [cgs] | 5.87 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.44 (0.08) | 0.42 (0.06) | |
| Distance | [pc] | 2259.38 (394) | 2409.06 (363) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 20.59 (0.1) | 20.737 (0.06) | |
| Proper motion (declination) | [mas/yr] | -17.513 (0.1) | -17.298 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.28 | |||
| V magnitude | 16.80 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.22 (0.003) | 16.19 (0.003) | ||
| BP magnitude | 15.98 (0.02) | |||
| RP magnitude | 16.50 (0.009) | |||
| Pan g magnitude | 16.04 (0.004) | |||
| Pan r magnitude | 16.45 (0.003) | |||
| Pan i magnitude | 16.82 (0.002) | |||
| Pan z magnitude | 17.13 (0.004) | |||
| Pan y magnitude | 17.31 (0.01) | |||
| E(B-V) | 0.020 | |||
* 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.