All names: WISE J020420.21+292734.9, LAMOSTJ020420.23+292734.8, SDSS J020420.22+292734.8, LAMOST J020420.23+292734.8, 2MASS J02042023+2927350, GALEX J020420.2+292734, UCAC4 598-005358, Gaia DR2 300019923940638336, Gaia DR3 300019923940638336
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 02 04 20.23 | 02 04 20.23 (0.06) | ||
| Declination | 29 27 34.88 | 29 27 34.89 (0.05) | ||
| Spectral type | sdOB | sdB | ||
| Effective temperature | [K] | 40941.0 (376) | ||
| log(g) | [cgs] | 6.31 (0.06) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.71 (0.1) | 0.66 (0.07) | |
| Distance | [pc] | 1400.56 (227) | 1510.35 (151) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.3 (0.2) | 4.45 (0.07) | |
| Proper motion (declination) | [mas/yr] | -3.168 (0.1) | -3.201 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.00 (0.1) | |||
| V magnitude | 16.17 (0.2) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.52 (0.1) | 16.52 (0.1) | ||
| H magnitude | 16.45 | |||
| K magnitude | 15.46 | |||
| u magnitude | 15.93 (0.006) | |||
| g magnitude | 15.97 (0.003) | 15.99 (0.09) | ||
| r magnitude | 16.38 (0.004) | 16.29 (0.1) | ||
| i magnitude | 16.70 (0.005) | |||
| z magnitude | 16.97 (0.01) | |||
| G magnitude | 16.20 (0.002) | 16.17 (0.003) | ||
| BP magnitude | 16.02 (0.007) | |||
| RP magnitude | 16.37 (0.004) | |||
| Pan g magnitude | 16.00 (0.009) | |||
| Pan r magnitude | 16.39 (0.002) | |||
| Pan i magnitude | 16.70 (0.003) | |||
| Pan z magnitude | 16.95 (0.004) | |||
| Pan y magnitude | 17.11 (0.004) | |||
| E(B-V) | 0.083 | |||
* 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.