All names: SDSS J123022.21+090635.1, USNO-B1.0 0991-00220083, Gaia DR3 3903547379920254848, LBQS 1227+0923, Gaia DR2 3903547379920254848, GALEX J123022.2+090635
| Parameter | Unit | Vincent et al. 2024 | Simbad |
|---|---|---|---|
| Right ascension | 12 30 22.22 | 12 30 22.21 (0.2) | |
| Declination | 09 06 34.97 | 09 06 35.20 (0.1) | |
| Spectral type | DA | sdB | |
| Effective temperature | [K] | 22439.0 (2092) | |
| log(g) | [cgs] | 7.89 (0.1) | |
| Mass | [M☉] | 0.573 (0.09) | |
| log(Luminosity) | [L☉] | ||
| Cooling age | [Gyr] | ||
| log(H/He) | |||
| log(C/He) | |||
| log(Ca/He) | |||
| log(Ca/H) | |||
| Parallax | [mas] | 2.43 | 2.43 (0.2) |
| Distance | [pc] | 411.77 | 411.76 (35) |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | 8.266 (0.2) | |
| Proper motion (declination) | [mas/yr] | -14.428 (0.2) | |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | 18.10 | ||
| V magnitude | |||
| R magnitude | 18.80 | ||
| I magnitude | |||
| J magnitude | |||
| H magnitude | |||
| K magnitude | |||
| u magnitude | 18.50 (0.02) | ||
| g magnitude | 18.36 (0.008) | ||
| r magnitude | 18.73 (0.01) | ||
| i magnitude | 18.97 (0.02) | ||
| z magnitude | 19.43 (0.1) | ||
| G magnitude | 18.55 | 18.55 (0.003) | |
| BP magnitude | |||
| RP magnitude | |||
| Pan g magnitude | |||
| Pan r magnitude | |||
| Pan i magnitude | |||
| Pan z magnitude | |||
| Pan y magnitude | |||
| 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.