All names: GALEX J191849.6-310441, WISEA J191849.75-310440.9, UCAC4 295-225391, 2MASS J19184976-3104408, UCAC2 18788660, TIC 31959467, DENIS J191849.7-310440, WISE J191849.75-310440.9, Gaia DR3 6758081940189907072, Gaia DR2 6758081940189907072, GALEXJ19188-3104
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 19 18 49.66 | 19 18 49.77 (0.03) | ||
| Declination | -31 04 41.80 | -31 04 40.75 (0.03) | ||
| Spectral type | He-sdOB | sdOBHe | ||
| 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] | 1.36 (0.06) | 1.43 (0.04) | |
| Distance | [pc] | 737.41 (32) | 698.52 (17) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -11.866 (0.08) | -11.869 (0.04) | |
| Proper motion (declination) | [mas/yr] | -3.433 (0.07) | -3.418 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.65 (0.01) | |||
| V magnitude | 13.77 (0.01) | |||
| R magnitude | 14.18 (0.06) | |||
| I magnitude | 13.85 (0.02) | |||
| J magnitude | 14.14 (0.03) | 14.14 (0.03) | ||
| H magnitude | 14.20 (0.04) | 14.20 (0.04) | ||
| K magnitude | 14.40 (0.08) | 14.40 (0.08) | ||
| u magnitude | ||||
| g magnitude | 13.60 (0.01) | |||
| r magnitude | 14.00 (0.01) | |||
| i magnitude | 14.37 (0.01) | |||
| z magnitude | ||||
| G magnitude | 13.75 (0.0008) | 13.73 (0.003) | ||
| BP magnitude | 13.57 (0.01) | |||
| RP magnitude | 13.89 (0.002) | |||
| Pan g magnitude | 13.97 | |||
| Pan r magnitude | 14.22 | |||
| Pan i magnitude | 14.23 (0.003) | |||
| Pan z magnitude | 14.60 | |||
| Pan y magnitude | 14.61 (0.007) | |||
| E(B-V) | 0.081 | |||
* 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.