All names: SDSS J205423.20+564352.1, SDSS J205423.21+564352.1, WISEA J205423.15+564350.7, 2MASS J20542319+5643521, KPD2053+5632, Gaia DR2 2189937617317072640, UCAC4 734-070927, KPD 2053+5632, WISE J205423.17+564350.8, Gaia DR3 2189937617317072640, TIC 429329413
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 54 23.14 | 20 54 23.21 (0.01) | ||
| Declination | 56 43 51.88 | 56 43 52.08 (0.01) | ||
| Spectral type | sdB | sdB | ||
| 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] | 1.89 (0.02) | 1.92 (0.01) | |
| Distance | [pc] | 529.07 (5) | 521.08 (4) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 7.295 (0.04) | 7.418 (0.02) | |
| Proper motion (declination) | [mas/yr] | 1.742 (0.03) | 1.734 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.61 (0.05) | |||
| V magnitude | 14.36 (0.07) | |||
| R magnitude | 14.46 (0.2) | |||
| I magnitude | ||||
| J magnitude | 13.91 (0.05) | 13.91 (0.05) | ||
| H magnitude | 13.84 (0.06) | 13.84 (0.06) | ||
| K magnitude | 13.94 (0.08) | 13.94 (0.08) | ||
| u magnitude | 15.06 (0.005) | |||
| g magnitude | 14.55 (0.004) | 14.40 (0.03) | ||
| r magnitude | 14.39 (0.007) | 14.28 (0.04) | ||
| i magnitude | 14.52 (0.004) | 14.29 (0.05) | ||
| z magnitude | 14.58 (0.005) | |||
| G magnitude | 14.29 (0.0003) | 14.28 (0.003) | ||
| BP magnitude | 14.40 (0.002) | |||
| RP magnitude | 14.05 (0.001) | |||
| Pan g magnitude | 14.41 (0.002) | |||
| Pan r magnitude | 14.34 (0.002) | |||
| Pan i magnitude | 14.38 (0.006) | |||
| Pan z magnitude | 14.48 (0.0007) | |||
| Pan y magnitude | 14.53 (0.004) | |||
| E(B-V) | 0.270 | |||
* 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.