All names: UCAC4 499-001057, PHL 818, PB 6143, PG0042+095, GALEX J004446.6+094351, SDSS J004446.63+094350.7, PG 0042+095, USNO-B1.0 0997-00009923, HS 0042+0927, Gaia DR3 2774222391277571840, Gaia DR2 2774222391277571840, TIC 293392917, 2MASS J00444664+0943509
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 00 44 46.65 | 00 44 46.64 (0.06) | ||
| Declination | 09 43 51.00 | 09 43 50.75 (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] | 0.31 (0.1) | 0.28 (0.07) | |
| Distance | [pc] | 3237.29 (1082) | 3573.98 (860) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.084 (0.2) | -0.485 (0.07) | |
| Proper motion (declination) | [mas/yr] | -2.897 (0.2) | -2.901 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.02 (0.2) | |||
| V magnitude | 16.10 (0) | |||
| R magnitude | 16.10 | |||
| I magnitude | ||||
| J magnitude | 16.75 (0.2) | 16.75 (0.1) | ||
| H magnitude | 15.91 | |||
| K magnitude | 15.96 | |||
| u magnitude | 15.71 (0.005) | |||
| g magnitude | 15.81 (0.003) | |||
| r magnitude | 16.21 (0.004) | |||
| i magnitude | 16.53 (0.005) | |||
| z magnitude | 16.80 (0.01) | |||
| G magnitude | 16.04 (0.001) | 16.02 (0.003) | ||
| BP magnitude | 15.87 (0.006) | |||
| RP magnitude | 16.22 (0.003) | |||
| Pan g magnitude | 15.87 (0.007) | |||
| Pan r magnitude | 16.23 (0.002) | |||
| Pan i magnitude | 16.56 (0.005) | |||
| Pan z magnitude | 16.79 (0.005) | |||
| Pan y magnitude | 16.96 (0.01) | |||
| E(B-V) | 0.037 | |||
* 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.