All names: Gaia DR2 2757798676856242432, SDSS J233408.15+074648.5, TIC 401369439, PG2331+075, GALEX J233408.1+074648, PG 2331+075, SDSS J233408.14+074648.4, PB 5447, Gaia DR3 2757798676856242432, 2MASS J23340817+0746486
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 23 34 08.09 | 23 34 08.14 (0.06) | ||
| Declination | 07 46 48.28 | 07 46 48.50 (0.05) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 31201.0 (1115) | ||
| log(g) | [cgs] | 6.19 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.89 (0.1) | 0.91 (0.07) | |
| Distance | [pc] | 1129.43 (166) | 1099.99 (87) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 11.6 (0.3) | 11.619 (0.07) | |
| Proper motion (declination) | [mas/yr] | 7.022 (0.1) | 6.963 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.74 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.57 (0.2) | 16.67 (0.02) | ||
| H magnitude | 16.64 (0.3) | 16.70 (0.03) | ||
| K magnitude | 15.58 | 16.80 (0.05) | ||
| u magnitude | 16.06 (0.006) | 16.08 (0.01) | ||
| g magnitude | 16.11 (0.005) | 16.10 (0.02) | ||
| r magnitude | 16.47 (0.006) | 16.46 (0.01) | ||
| i magnitude | 16.74 (0.006) | 16.73 (0.02) | ||
| z magnitude | 16.98 (0.01) | 16.96 (0.03) | ||
| G magnitude | 16.29 (0.002) | 16.27 (0.003) | ||
| BP magnitude | 16.15 (0.007) | |||
| RP magnitude | 16.40 (0.005) | |||
| Pan g magnitude | 16.14 (0.005) | |||
| Pan r magnitude | 16.45 (0.003) | |||
| Pan i magnitude | 16.74 (0.002) | |||
| Pan z magnitude | 16.97 (0.004) | |||
| Pan y magnitude | 17.12 (0.01) | |||
| E(B-V) | 0.068 | |||
* 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.