All names: GALEX J082434.0+302854, SDSS J082434.05+302854.6, TIC 333523715, UCAC4 603-045172, LAMOST J082434.05+302854.6, WISEA J082434.05+302854.6, Gaia DR3 708829002962898304, WISE J082434.04+302854.8, PG0821+306, PG 0821+306, Gaia DR2 708829002962898304, 2MASS J08243405+3028548, UCAC2 42405047, Ton 317, SDSS J082434.05+302854.7
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 24 34.05 | 08 24 34.05 (0.03) | ||
| Declination | 30 28 54.60 | 30 28 54.76 (0.02) | ||
| Spectral type | sdO+MS | sdO+F5V | ||
| 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] | 0.33 (0.05) | 0.30 (0.03) | |
| Distance | [pc] | 3056.23 (461) | 3356.83 (376) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -6.511 (0.09) | -6.63 (0.03) | |
| Proper motion (declination) | [mas/yr] | -8.917 (0.07) | -8.827 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.39 (0.05) | |||
| V magnitude | 15.31 (0.08) | |||
| R magnitude | 15.21 (0.08) | |||
| I magnitude | ||||
| J magnitude | 14.76 (0.04) | 14.76 (0.04) | ||
| H magnitude | 14.56 (0.06) | 14.56 (0.06) | ||
| K magnitude | 14.52 (0.06) | 14.52 (0.06) | ||
| u magnitude | 15.33 (0.004) | 15.33 (0.004) | ||
| g magnitude | 15.22 (0.004) | 15.22 (0.004) | ||
| r magnitude | 15.31 (0.004) | 15.31 (0.004) | ||
| i magnitude | 15.35 (0.004) | 15.35 (0.004) | ||
| z magnitude | 15.43 (0.006) | 15.43 (0.006) | ||
| G magnitude | 15.22 (0.0006) | 15.20 (0.003) | ||
| BP magnitude | 15.24 (0.007) | |||
| RP magnitude | 15.04 (0.002) | |||
| Pan g magnitude | 15.27 (0.002) | |||
| Pan r magnitude | 15.31 (0.002) | |||
| Pan i magnitude | 15.38 (0.003) | |||
| Pan z magnitude | 15.46 (0.003) | |||
| Pan y magnitude | 15.48 (0.005) | |||
| E(B-V) | 0.026 | |||
* 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.