All names: GALEX J193046.0-305000, DENIS J193046.1-304959, WISEA J193046.12-304959.3, TIC 113118441, GALEXJ19307-3049, UCAC4 296-224006, 2MASS J19304612-3049592, Gaia DR2 6746304422609405696, Gaia DR3 6746304422609405696, UCAC2 19034993, WISE J193046.12-304959.2
| Parameter | Unit | Geier 2020 | Simbad |
|---|---|---|---|
| Right ascension | 19 30 46.13 | 19 30 46.13 (0.03) | |
| Declination | -30 49 58.69 | -30 49 59.41 (0.03) | |
| Spectral type | He-sdO | sdOHe | |
| 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] | -0.04 (0.06) | 0.04 (0.04) |
| Distance | [pc] | 23752.97 (22173) | |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -0.513 (0.1) | -0.255 (0.04) |
| Proper motion (declination) | [mas/yr] | -9.436 (0.09) | -9.603 (0.03) |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | 14.29 (0.05) | ||
| V magnitude | 14.49 (0.01) | ||
| R magnitude | 14.82 (0.01) | ||
| I magnitude | 14.64 (0.03) | ||
| J magnitude | 14.96 (0.04) | 14.96 (0.04) | |
| H magnitude | 15.09 (0.1) | 15.09 (0.1) | |
| K magnitude | 15.31 (0.2) | 15.31 (0.2) | |
| u magnitude | |||
| g magnitude | 14.32 (0.02) | ||
| r magnitude | 14.72 (0.05) | ||
| i magnitude | 14.84 (0.1) | ||
| z magnitude | |||
| G magnitude | 14.46 (0.0009) | 14.44 (0.003) | |
| BP magnitude | 14.26 (0.01) | ||
| RP magnitude | 14.62 (0.003) | ||
| Pan g magnitude | 14.33 | ||
| Pan r magnitude | 14.72 | ||
| Pan i magnitude | 14.95 (0.004) | ||
| Pan z magnitude | 15.28 | ||
| Pan y magnitude | 15.50 | ||
| E(B-V) | |||
* 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.