All names: WISE J001928.98+284446.5, SDSS J001928.93+284446.9, PG0016+285, WISEA J001928.99+284446.8, Gaia DR2 2857359660909486080, PG 0016+285, 2MASS J00192897+2844464, Gaia DR3 2857359660909486080, GALEX J001928.9+284447, TIC 306178520, UCAC4 594-000895
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 00 19 28.95 | 00 19 28.94 (0.04) | ||
| Declination | 28 44 47.40 | 28 44 47.04 (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] | 0.36 (0.07) | 0.29 (0.05) | |
| Distance | [pc] | 2812.15 (524) | 3491.62 (574) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.182 (0.1) | -0.876 (0.05) | |
| Proper motion (declination) | [mas/yr] | -0.984 (0.08) | -0.728 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.74 (0.09) | |||
| V magnitude | 15.97 (0.07) | |||
| R magnitude | 16.16 (0.2) | |||
| I magnitude | ||||
| J magnitude | 16.41 (0.1) | 16.41 (0.1) | ||
| H magnitude | 16.23 (0.2) | 16.23 (0.2) | ||
| K magnitude | 15.83 (0.3) | 15.83 (0.3) | ||
| u magnitude | 15.78 (0.005) | |||
| g magnitude | 15.67 (0.004) | |||
| r magnitude | 16.11 (0.004) | |||
| i magnitude | 16.37 (0.005) | |||
| z magnitude | 16.64 (0.009) | |||
| G magnitude | 15.91 (0.0008) | 15.89 (0.003) | ||
| BP magnitude | 15.78 (0.005) | |||
| RP magnitude | 16.07 (0.003) | |||
| Pan g magnitude | 15.75 (0.005) | |||
| Pan r magnitude | 16.09 (0.001) | |||
| Pan i magnitude | 16.39 (0.003) | |||
| Pan z magnitude | 16.63 (0.005) | |||
| Pan y magnitude | 16.77 (0.007) | |||
| E(B-V) | 0.056 | |||
* 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.