All names: SDSSJ222817.66-075947.9, GALEX J222817.6-075947, SDSS J222817.66-075947.9, Gaia DR3 2621591996745553280, Gaia DR2 2621591996745553280, PHL 1916
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 28 17.66 | 22 28 17.66 (0.08) | ||
| Declination | -07 59 47.90 | -07 59 47.85 (0.08) | ||
| Spectral type | sdOB | sdOB | ||
| 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] | 0.31 (0.1) | 0.34 (0.09) | |
| Distance | [pc] | 3182.69 (1461) | 2936.00 (778) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 8.13 (0.2) | 8.068 (0.1) | |
| Proper motion (declination) | [mas/yr] | -4.595 (0.2) | -4.701 (0.1) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 17.90 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 17.66 (0.01) | 17.66 (0.01) | ||
| g magnitude | 17.43 (0.005) | 17.43 (0.005) | ||
| r magnitude | 17.46 (0.006) | 17.46 (0.006) | ||
| i magnitude | 17.57 (0.007) | 17.57 (0.007) | ||
| z magnitude | 17.58 (0.02) | 17.58 (0.02) | ||
| G magnitude | 17.42 (0.002) | 17.39 (0.003) | ||
| BP magnitude | 17.45 (0.01) | |||
| RP magnitude | 17.19 (0.01) | |||
| Pan g magnitude | 17.46 (0.006) | |||
| Pan r magnitude | 17.49 (0.003) | |||
| Pan i magnitude | 17.56 (0.002) | |||
| Pan z magnitude | 17.62 (0.005) | |||
| Pan y magnitude | 17.67 (0.01) | |||
| E(B-V) | 0.056 | |||
* 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.