All names: Gaia DR2 2708400230759920768, HIDDEN NAME PG 2218+051, Gaia DR3 2708400230759920768, 2MASS J22212256+0524584, Gaia EDR3 2708400230759920768, PG2218+051, LAMOST J222122.56+052458.3, TIC 265788281, SDSS J222122.56+052458.3, PG 2218+052
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 21 22.58 (0.04) | 22 21 22.53 | 22 21 22.56 (0.04) | ||
| Declination | 05 24 58.25 (0.04) | 05 24 59.22 | 05 24 58.41 (0.04) | ||
| Spectral type | He-sdOB | sdB0.5VIIHe20 | |||
| Effective temperature | [K] | 35950.0 (740) | |||
| log(g) | [cgs] | 5.92 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.01 (0.04) | 0.97 (0.07) | 1.01 (0.04) | |
| Distance | [pc] | 989.32 (42) | 1033.59 (74) | 989.32 (42) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 13.685 (0.05) | 13.502 (0.1) | 13.685 (0.05) | |
| Proper motion (declination) | [mas/yr] | -10.272 (0.05) | -10.152 (0.1) | -10.272 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.30 | ||||
| V magnitude | 15.37 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.79 (0.07) | 15.86 (0.007) | |||
| H magnitude | 15.97 (0.2) | 15.95 (0.02) | |||
| K magnitude | 16.02 | 16.06 (0.04) | |||
| u magnitude | 14.83 (0.004) | 14.83 (0.004) | |||
| g magnitude | 15.06 (0.004) | 15.06 (0.004) | |||
| r magnitude | 15.49 (0.005) | 15.49 (0.005) | |||
| i magnitude | 15.80 (0.005) | 15.80 (0.005) | |||
| z magnitude | 16.10 (0.007) | 16.10 (0.007) | |||
| G magnitude | 15.27 (0.003) | 15.28 (0.0008) | 15.27 (0.003) | ||
| BP magnitude | 15.15 (0.003) | 15.11 (0.008) | |||
| RP magnitude | 15.49 (0.005) | 15.50 (0.004) | |||
| Pan g magnitude | 15.14 (0.003) | ||||
| Pan r magnitude | 15.50 (0.004) | ||||
| Pan i magnitude | 15.83 (0.002) | ||||
| Pan z magnitude | 16.08 (0.004) | ||||
| Pan y magnitude | 16.26 (0.006) | ||||
| E(B-V) | 0.065 | ||||
* 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.