All names: TIC 51809038, 2MASS J22310362+1217087, Gaia DR3 2730881326537936896, UCAC4 512-136327, GALEX J223103.7+121710, Gaia DR2 2730881326537936896, WISE J223103.63+121709.2, PG 2228+120, WISEA J223103.62+121709.1, PG2228+120, LAMOST J223103.64+121709.2, SDSS J223103.64+121709.2
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 31 03.64 | 22 31 03.65 (0.06) | ||
| Declination | 12 17 09.54 | 12 17 09.25 (0.06) | ||
| Spectral type | sdOB | sdB | ||
| Effective temperature | [K] | 43144.0 (835) | ||
| log(g) | [cgs] | 5.73 (0.08) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.45 (0.1) | 0.43 (0.06) | |
| Distance | [pc] | 2231.15 (502) | 2324.50 (349) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.997 (0.2) | 1.756 (0.07) | |
| Proper motion (declination) | [mas/yr] | -1.172 (0.1) | -1.033 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.52 (0.06) | |||
| V magnitude | 15.69 (0.09) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.26 (0.09) | 16.26 (0.09) | ||
| H magnitude | 16.29 (0.2) | 16.29 (0.2) | ||
| K magnitude | 15.79 | |||
| u magnitude | 15.14 (0.004) | 15.14 (0.004) | ||
| g magnitude | 15.42 (0.004) | 15.42 (0.004) | ||
| r magnitude | 15.90 (0.004) | 15.90 (0.004) | ||
| i magnitude | 16.23 (0.005) | 16.23 (0.005) | ||
| z magnitude | 16.52 (0.008) | 16.52 (0.008) | ||
| G magnitude | 15.69 (0.001) | 15.68 (0.003) | ||
| BP magnitude | 15.48 (0.01) | |||
| RP magnitude | 15.92 (0.005) | |||
| Pan g magnitude | 15.52 (0.003) | |||
| Pan r magnitude | 15.91 (0.004) | |||
| Pan i magnitude | 16.26 (0.002) | |||
| Pan z magnitude | 16.52 (0.005) | |||
| Pan y magnitude | 16.69 (0.004) | |||
| E(B-V) | 0.058 | |||
* 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.