All names: Gaia DR2 669487686647270784, GALEX J080921.8+192401, Gaia DR3 669487686647270784, LAMOST J080921.90+192400.7, SDSS J080921.89+192400.1, SDSS J080921.89+192400.0, Gaia EDR3 669487686647270784
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Guo et al. 2015 | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 09 21.90 (0.08) | 08 09 21.90 | 08 09 21.90 (0.09) | 08 09 21.90 | 08 09 21.89 (0.08) | 08 09 21.89 | ||||||
| Declination | 19 24 00.03 (0.05) | 19 24 00.05 | 19 24 00.03 (0.05) | 19 24 00.03 | 19 24 00.13 (0.05) | 19 24 00.10 | ||||||
| Spectral type | DAO | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 85973.0 (3969) | 281281.0 (73997) | 83860.0 (2372) | ||||||||
| log(g) | [cgs] | 7.37 (0.1) | 8.36 (0.1) | 7.22 (0.09) | ||||||||
| Mass | [M☉] | 0.55 (0.03) | 1.97 (0.2) | 0.537 (0.02) | ||||||||
| log(Luminosity) | [L☉] | 1.50 (0.1) | ||||||||||
| Cooling age | [Gyr] | 0.0001 | ||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(C/H) | ||||||||||||
| log(N/H) | ||||||||||||
| log(O/H) | ||||||||||||
| log(Na/H) | ||||||||||||
| log(Mg/H) | ||||||||||||
| log(Al/H) | ||||||||||||
| log(Si/H) | ||||||||||||
| log(P/H) | ||||||||||||
| log(S/H) | ||||||||||||
| log(Sc/H) | ||||||||||||
| log(Ti/H) | ||||||||||||
| log(Cr/H) | ||||||||||||
| log(Mn/H) | ||||||||||||
| log(Fe/H) | ||||||||||||
| log(Ni/H) | ||||||||||||
| Parallax | [mas] | 1.49 (0.09) | 1.68 (0.1) | 1.49 | 1.49 (0.09) | |||||||
| Distance | [pc] | 671.67 (41) | 596.09 (38) | 671.67 | 671.68 (41) | |||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 3.539515187 (0.09) | 3.703925673 (0.2) | 3.54 (0.09) | ||||||||
| Proper motion (declination) | [mas/yr] | -6.772807949 (0.06) | -7.069806038 (0.1) | -6.773 (0.06) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 17.38 (0.02) | |||||||||||
| H magnitude | 17.68 (0.06) | |||||||||||
| K magnitude | 17.38 (0.1) | |||||||||||
| u magnitude | 15.86 (0.005) | 15.86 (0.005) | 15.85 (0.02) | |||||||||
| g magnitude | 16.31 (0.004) | 16.31 (0.004) | 16.37 (0.02) | |||||||||
| r magnitude | 16.85 (0.005) | 16.85 (0.005) | 16.88 (0.02) | |||||||||
| i magnitude | 17.24 (0.006) | 17.24 (0.006) | 17.24 (0.02) | |||||||||
| z magnitude | 17.58 (0.02) | 17.58 (0.02) | 17.62 (0.02) | |||||||||
| G magnitude | 16.59 (0.004) | 16.63 | 16.59 | 16.59 (0.003) | ||||||||
| BP magnitude | 16.42 (0.004) | 16.31 | ||||||||||
| RP magnitude | 16.93 (0.007) | 16.91 | ||||||||||
| Pan g magnitude | 16.40 (0.004) | |||||||||||
| Pan r magnitude | 16.89 (0.002) | |||||||||||
| Pan i magnitude | 17.26 (0.004) | |||||||||||
| Pan z magnitude | 17.57 (0.005) | |||||||||||
| Pan y magnitude | 17.78 (0.01) | |||||||||||
| E(B-V) | 0.033 | |||||||||||
* 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.