All names: GALEX J183716.7-312514, UCAC2 18767905, TIC 380274928, UCAC4 293-203106, GALEXJ18372-3125, 2MASS J18371683-3125156, WISE J183716.86-312515.5, Gaia DR2 4046679845165833472, WISEA J183716.88-312515.7, Gaia DR3 4046679845165833472
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 37 16.78 | 18 37 16.82 (0.03) | ||
| Declination | -31 25 14.11 | -31 25 15.66 (0.03) | ||
| Spectral type | He-sdOB | sdOC8VIIHe38 | ||
| 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] | 1.01 (0.06) | 1.01 (0.04) | |
| Distance | [pc] | 993.84 (58) | 986.29 (36) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 5.061 (0.09) | 5.065 (0.04) | |
| Proper motion (declination) | [mas/yr] | -0.974 (0.07) | -0.882 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | 14.32 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.35 (0.04) | 14.35 (0.04) | ||
| H magnitude | 14.48 (0.06) | 14.48 (0.06) | ||
| K magnitude | 14.48 (0.1) | 14.48 (0.1) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 13.86 (0.0009) | 13.84 (0.003) | ||
| BP magnitude | 13.66 (0.01) | |||
| RP magnitude | 14.04 (0.003) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.113 | |||
* 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.