All names: UCAC4 563-133997, GALEX J215841.0+222953, Gaia DR2 1782717886642757376, HS2156+2215, 2MASS J21584097+2229529, TIC 423903394, Gaia DR3 1782717886642757376, UCAC2 39771297, HS 2156+2215
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 58 40.96 | 21 58 40.98 (0.04) | ||
| Declination | 22 29 53.00 | 22 29 52.67 (0.03) | ||
| Spectral type | sdOB | sdOB | ||
| Effective temperature | [K] | 33400.0 (1000) | ||
| log(g) | [cgs] | 5.25 (0.2) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.43 (0.08) | 0.52 (0.05) | |
| Distance | [pc] | 2320.72 (413) | 1910.22 (178) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.422 (0.09) | -1.377 (0.04) | |
| Proper motion (declination) | [mas/yr] | -3.363 (0.09) | -3.334 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.25 (0.04) | |||
| V magnitude | 15.46 (0.1) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.17 (0.1) | 16.17 (0.1) | ||
| H magnitude | 16.11 (0.2) | 16.11 (0.2) | ||
| K magnitude | 16.01 | |||
| u magnitude | 14.93 (0.004) | |||
| g magnitude | 15.18 (0.003) | 15.24 (0.06) | ||
| r magnitude | 15.65 (0.004) | 15.64 (0.04) | ||
| i magnitude | 15.98 (0.004) | 15.70 (0.09) | ||
| z magnitude | 16.28 (0.009) | |||
| G magnitude | 15.44 (0.0009) | 15.43 (0.003) | ||
| BP magnitude | 15.26 (0.007) | |||
| RP magnitude | 15.68 (0.003) | |||
| Pan g magnitude | 15.28 (0.003) | |||
| Pan r magnitude | 15.66 (0.004) | |||
| Pan i magnitude | 16.01 (0.002) | |||
| Pan z magnitude | 16.27 (0.005) | |||
| Pan y magnitude | 16.44 (0.003) | |||
| E(B-V) | 0.059 | |||
* 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.