All names: UCAC2 34400397, UCAC4 490-007240, GALEX J042856.7+075539, KUV04262+0749, Gaia DR2 3287164253766135808, Gaia DR3 3287164253766135808, KUV 04262+0749, LAMOST J042856.79+075539.3, TIC 284677903, 2MASS J04285681+0755393
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 28 56.79 | 04 28 56.80 (0.02) | ||
| Declination | 07 55 39.38 | 07 55 39.31 (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] | 0.13 (0.05) | 0.09 (0.03) | |
| Distance | [pc] | 7616.15 (3115) | 10834.24 (3510) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.148 (0.09) | 1.032 (0.03) | |
| Proper motion (declination) | [mas/yr] | -0.401 (0.06) | -0.538 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.23 (0.01) | |||
| V magnitude | 15.06 (0.03) | |||
| R magnitude | 15.29 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.99 (0.04) | 14.99 (0.04) | ||
| H magnitude | 14.87 (0.07) | 14.87 (0.07) | ||
| K magnitude | 14.99 (0.1) | 14.99 (0.1) | ||
| u magnitude | 15.56 (0.005) | |||
| g magnitude | 15.02 (0.004) | 15.04 (0.05) | ||
| r magnitude | 15.13 (0.004) | 15.17 (0.01) | ||
| i magnitude | 15.29 (0.005) | 15.43 (0.2) | ||
| z magnitude | 15.42 (0.006) | |||
| G magnitude | 15.08 (0.0005) | 15.06 (0.003) | ||
| BP magnitude | 15.08 (0.004) | |||
| RP magnitude | 14.98 (0.003) | |||
| Pan g magnitude | 15.05 (0.003) | |||
| Pan r magnitude | 15.16 (0.001) | |||
| Pan i magnitude | 15.32 (0.002) | |||
| Pan z magnitude | 15.45 (0.008) | |||
| Pan y magnitude | 15.49 (0.007) | |||
| E(B-V) | 0.191 | |||
* 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.