All names: SDSS J222122.56+052458.3, PG2218+051, HIDDEN NAME PG 2218+051, Gaia EDR3 2708400230759920768, TIC 265788281, Gaia DR3 2708400230759920768, 2MASS J22212256+0524584, LAMOST J222122.56+052458.3, PG 2218+052, Gaia DR2 2708400230759920768
| 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.