All names: GALEXJ00428-4413, GALEX J004248.4-441325, 2MASS J00424837-4413253, EC 00404-4429, TIC 80427831, Gaia DR3 4979799492046952576, SBC9 3323, Gaia DR2 4979799492046952576, USNO-A2.0 0450-00251432, Gaia EDR3 4979799492046952576, GSC 07538-00411
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 00 42 48.41 (0.02) | 00 42 48.33 | 00 42 48.38 (0.02) | ||
| Declination | -44 13 25.05 (0.02) | -44 13 24.06 | -44 13 25.22 (0.02) | ||
| Spectral type | sdB+WD | 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] | 1.53 (0.03) | 1.52 (0.05) | 1.53 (0.03) | |
| Distance | [pc] | 655.05 (14) | 657.16 (22) | 655.05 (14) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 22.956 (0.02) | 23.074 (0.06) | 22.956 (0.02) | |
| Proper motion (declination) | [mas/yr] | 10.545 (0.03) | 10.712 (0.07) | 10.545 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.00 | ||||
| V magnitude | 13.40 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.22 (0.03) | 14.22 (0.03) | |||
| H magnitude | 14.42 (0.05) | 14.42 (0.05) | |||
| K magnitude | 14.41 (0.07) | 14.41 (0.07) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 13.64 (0.003) | 13.66 (0.0003) | 13.64 (0.003) | ||
| BP magnitude | 13.50 (0.003) | 13.44 (0.005) | |||
| RP magnitude | 13.90 (0.004) | 13.90 (0.001) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.008 | ||||
* 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.