All names: 2MASS J21082377+2448389, UCAC2 40606223, WISEA J210823.77+244838.9, WISE J210823.78+244839.0, UCAC4 575-123303, Gaia DR2 1841099308379288960, Gaia DR3 1841099308379288960, GALEXJ21083+2448, GALEX J210823.8+244839, TIC 126937414
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 08 23.82 | 21 08 23.77 (0.02) | ||
| Declination | 24 48 39.18 | 24 48 38.98 (0.02) | ||
| 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] | 0.89 (0.05) | 0.99 (0.03) | |
| Distance | [pc] | 1125.11 (66) | 1005.43 (30) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.673 (0.09) | -1.668 (0.03) | |
| Proper motion (declination) | [mas/yr] | -10.118 (0.08) | -10.085 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.14 (0.04) | |||
| V magnitude | 14.28 (0.06) | |||
| R magnitude | 14.38 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.65 (0.04) | 14.65 (0.04) | ||
| H magnitude | 14.72 (0.05) | 14.72 (0.05) | ||
| K magnitude | 14.74 (0.1) | 14.74 (0.1) | ||
| u magnitude | ||||
| g magnitude | 14.07 (0.01) | |||
| r magnitude | 14.44 (0.01) | |||
| i magnitude | 14.70 (0.05) | |||
| z magnitude | ||||
| G magnitude | 14.26 (0.0006) | 14.24 (0.003) | ||
| BP magnitude | 14.12 (0.007) | |||
| RP magnitude | 14.39 (0.003) | |||
| Pan g magnitude | 14.13 (0.003) | |||
| Pan r magnitude | 14.45 (0.001) | |||
| Pan i magnitude | 14.73 (0.003) | |||
| Pan z magnitude | 14.96 (0.003) | |||
| Pan y magnitude | 15.10 (0.006) | |||
| E(B-V) | 0.113 | |||
* 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.