All names: Gaia DR3 1830964388160536064, 2MASS J20284565+2327368, KPD2026+2316, KPD 2026+2316, Gaia DR2 1830964388160536064, TIC 210199600, UCAC4 568-110997
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 28 45.67 | 20 28 45.66 (0.03) | ||
| Declination | 23 27 36.92 | 23 27 36.50 (0.03) | ||
| 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] | 0.64 (0.06) | 0.55 (0.04) | |
| Distance | [pc] | 1571.59 (148) | 1816.20 (128) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.922 (0.08) | 0.881 (0.03) | |
| Proper motion (declination) | [mas/yr] | -5.435 (0.07) | -5.615 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.14 | |||
| V magnitude | 16.18 | |||
| R magnitude | 16.07 (0.3) | |||
| I magnitude | ||||
| J magnitude | 16.51 (0.1) | 16.51 (0.1) | ||
| H magnitude | 16.01 | |||
| K magnitude | 15.44 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.19 (0.0008) | 16.16 (0.003) | ||
| BP magnitude | 16.10 (0.005) | |||
| RP magnitude | 16.21 (0.004) | |||
| Pan g magnitude | 16.10 (0.004) | |||
| Pan r magnitude | 16.33 (0.002) | |||
| Pan i magnitude | 16.55 (0.004) | |||
| Pan z magnitude | 16.73 (0.003) | |||
| Pan y magnitude | 16.87 (0.006) | |||
| E(B-V) | 0.149 | |||
* 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.