All names: UCAC4 849-014477, 2MASS J20024067+7941530, Gaia DR2 2292094376519596800, Gaia DR3 2292094376519596800, HS2005+7933, HS 2005+7933, TIC 235983043, GALEX J200240.5+794151
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 02 40.74 | 20 02 40.68 (0.03) | ||
| Declination | 79 41 53.25 | 79 41 53.10 (0.03) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 24200.0 (600) | ||
| log(g) | [cgs] | 5.05 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.60 (0.04) | 0.56 (0.03) | |
| Distance | [pc] | 1675.32 (113) | 1776.51 (102) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.544 (0.08) | -1.59 (0.04) | |
| Proper motion (declination) | [mas/yr] | -2.545 (0.08) | -2.566 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | 15.74 (0.03) | |||
| I magnitude | ||||
| J magnitude | 16.05 (0.1) | 16.05 (0.1) | ||
| H magnitude | 16.04 (0.2) | 16.04 (0.2) | ||
| K magnitude | 15.28 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.45 (0.0008) | 15.43 (0.003) | ||
| BP magnitude | 15.27 (0.006) | |||
| RP magnitude | 15.64 (0.005) | |||
| Pan g magnitude | 15.32 (0.002) | |||
| Pan r magnitude | 15.66 (0.002) | |||
| Pan i magnitude | 15.98 (0.002) | |||
| Pan z magnitude | 16.23 (0.004) | |||
| Pan y magnitude | 16.38 (0.005) | |||
| E(B-V) | 0.156 | |||
* 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.