All names: UCAC2 32143639, 2MASS J04203485+0120410, GALAH 160916004301323, GALEXJ04205+0120, UCAC4 457-006146, TIC 454147106, GALEX J042034.8+012042, GALEX J042034.8+012041, Gaia EDR3 3255780171819962496, Gaia DR3 3255780171819962496, Gaia DR2 3255780171819962496
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 04 20 34.87 (0.05) | 04 20 34.85 | 04 20 34.85 (0.05) | ||
| Declination | 01 20 40.80 (0.04) | 01 20 42.20 | 01 20 40.84 (0.04) | ||
| Spectral type | He-sdO | sdOC8.5VIIHe39 | |||
| Effective temperature | [K] | 46050.0 (910) | |||
| log(g) | [cgs] | 5.97 (0.2) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 2.42 (0.06) | 2.43 (0.06) | 2.42 (0.06) | |
| Distance | [pc] | 413.07 (11) | 410.73 (10) | 413.07 (11) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 23.44 (0.07) | 23.4 (0.1) | 23.44 (0.07) | |
| Proper motion (declination) | [mas/yr] | -2.429 (0.05) | -2.205 (0.08) | -2.429 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 12.13 (0.04) | ||||
| V magnitude | 12.33 (0.02) | ||||
| R magnitude | 12.71 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 12.96 (0.03) | 12.96 (0.03) | |||
| H magnitude | 13.10 (0.03) | 13.10 (0.03) | |||
| K magnitude | 13.11 (0.03) | 13.11 (0.03) | |||
| u magnitude | |||||
| g magnitude | 12.10 (0.02) | ||||
| r magnitude | 12.56 (0.02) | ||||
| i magnitude | 12.95 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 12.30 (0.003) | 12.32 (0.0007) | 12.30 (0.003) | ||
| BP magnitude | 12.15 (0.003) | 12.08 (0.02) | |||
| RP magnitude | 12.59 (0.004) | 12.58 (0.003) | |||
| Pan g magnitude | 12.23 | ||||
| Pan r magnitude | 12.66 | ||||
| Pan i magnitude | 13.00 | ||||
| Pan z magnitude | 13.20 (0.003) | ||||
| Pan y magnitude | 13.41 (0.002) | ||||
| E(B-V) | 0.064 | ||||
* 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.