All names: WISEA J202818.22+221607.9, 2MASS J20281823+2216068, UCAC2 39747857, WISE J202818.25+221607.9, Gaia EDR3 1818734245446134016, KPD 2026+2205, KPD2026+2205, Gaia DR2 1818734245446134016, UCAC4 562-115762, Gaia DR3 1818734245446134016, TIC 210196125
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 28 18.23 (0.02) | 20 28 18.19 | 20 28 18.23 (0.02) | ||
| Declination | 22 16 06.77 (0.02) | 22 16 07.25 | 22 16 06.79 (0.02) | ||
| Spectral type | sdO | sdO | |||
| 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] | 0.82 (0.03) | 0.80 (0.05) | 0.82 (0.03) | |
| Distance | [pc] | 1214.48 (51) | 1248.13 (72) | 1214.48 (51) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 3.564 (0.03) | 3.568 (0.07) | 3.564 (0.03) | |
| Proper motion (declination) | [mas/yr] | -1.263 (0.03) | -1.349 (0.06) | -1.263 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | 14.70 | ||||
| R magnitude | 14.95 (0.07) | ||||
| I magnitude | |||||
| J magnitude | 15.29 (0.06) | 15.29 (0.06) | |||
| H magnitude | 15.39 (0.1) | 15.39 (0.1) | |||
| K magnitude | 15.20 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 14.64 (0.003) | 14.66 (0.0005) | 14.64 (0.003) | ||
| BP magnitude | 14.51 (0.003) | 14.45 (0.007) | |||
| RP magnitude | 14.89 (0.004) | 14.89 (0.002) | |||
| Pan g magnitude | 14.50 (0.003) | ||||
| Pan r magnitude | 14.89 (0.001) | ||||
| Pan i magnitude | 15.23 (0.005) | ||||
| Pan z magnitude | 15.50 (0.001) | ||||
| Pan y magnitude | 15.69 (0.007) | ||||
| E(B-V) | 0.103 | ||||
* 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.