All names: Gaia DR2 4008690580212174080, SDSS J122420.51+264738.8, Gaia DR3 4008690580212174080, Gaia EDR3 4008690580212174080, LAMOST J122420.49+264738.8, SDSS J122420.51+264738.9
| Parameter | Unit | Gaia EDR3 | Stilism | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|
| Right ascension | 12 24 20.51 (0.07) | 12 24 20.51 | 12 24 20.52 (0.07) | |||
| Declination | 26 47 38.72 (0.06) | 26 47 38.72 | 26 47 38.85 (0.06) | |||
| Spectral type | DB | DB | DB | |||
| Effective temperature | [K] | 16504.0 (747) | ||||
| log(g) | [cgs] | 7.99 (0.06) | ||||
| Mass | [M☉] | 0.586 (0.04) | ||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | 5.82 (0.09) | 5.82 | 5.82 (0.09) | ||
| Distance | [pc] | 171.76 (3) | 171.76 | 171.76 (3) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -7.801 (0.09) | -7.801 (0.09) | |||
| Proper motion (declination) | [mas/yr] | -8.188 (0.07) | -8.188 (0.07) | |||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | 16.95 (0.007) | |||||
| g magnitude | 17.04 (0.004) | |||||
| r magnitude | 17.38 (0.005) | |||||
| i magnitude | 17.65 (0.007) | |||||
| z magnitude | 17.90 (0.02) | |||||
| G magnitude | 17.21 (0.003) | 17.21 | 17.21 (0.003) | |||
| BP magnitude | 17.16 (0.007) | |||||
| RP magnitude | 17.32 (0.01) | |||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.007 | |||||
* 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.