All names: LAMOST J092440.10+305013.1, Gaia DR2 700362419831670016, 2MASS J09244006+3050124, GALEX J092440.1+305013, GALEX J092440.0+305013, SDSS J092440.07+305012.5, PG 0921+311, Gaia DR3 700362419831670016, uvby98 610070414, TIC 307913214, PG0921+311, Ton 414, CBS 7, Gaia EDR3 700362419831670016
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 09 24 40.08 (0.04) | 09 24 40.05 | 09 24 40.07 (0.04) | ||
| Declination | 30 50 12.46 (0.03) | 30 50 13.07 | 30 50 12.59 (0.03) | ||
| Spectral type | He-sdO | sdBN0VIIHe35 | |||
| Effective temperature | [K] | 40830.0 (160) | |||
| log(g) | [cgs] | 5.84 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.81 (0.05) | 0.66 (0.09) | 0.81 (0.05) | |
| Distance | [pc] | 1238.24 (79) | 1522.30 (201) | 1238.24 (79) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 7.918 (0.05) | 7.716 (0.1) | 7.918 (0.05) | |
| Proper motion (declination) | [mas/yr] | -8.235 (0.04) | -8.143 (0.08) | -8.235 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.60 | ||||
| V magnitude | 14.73 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.30 (0.05) | 15.31 (0.004) | |||
| H magnitude | 15.63 (0.1) | 15.41 (0.01) | |||
| K magnitude | 15.33 (0.2) | 15.53 (0.02) | |||
| u magnitude | 13.93 (0.003) | 13.93 (0.003) | |||
| g magnitude | 14.29 (0.003) | 14.29 (0.003) | |||
| r magnitude | 14.79 (0.004) | 14.79 (0.004) | |||
| i magnitude | 15.19 (0.004) | 15.19 (0.004) | |||
| z magnitude | 15.53 (0.006) | 15.53 (0.006) | |||
| G magnitude | 14.56 (0.003) | 14.57 (0.001) | 14.56 (0.003) | ||
| BP magnitude | 14.39 (0.003) | 14.32 (0.009) | |||
| RP magnitude | 14.87 (0.004) | 14.86 (0.005) | |||
| Pan g magnitude | 14.38 (0.002) | ||||
| Pan r magnitude | 14.83 (0.003) | ||||
| Pan i magnitude | 15.21 (0.003) | ||||
| Pan z magnitude | 15.50 (0.0001) | ||||
| Pan y magnitude | 15.70 (0.006) | ||||
| E(B-V) | 0.020 | ||||
* 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.