All names: GALEX J082056.2+480353, LSPM J0820+4803E, Gaia DR3 931304937345481344, SDSS J082056.07+480352.8, Gaia EDR3 931304937345481344, Gaia DR2 931304937345481344, TIC 309705929, WD 0817+482, 2MASS J08205607+4803531, SDSS J082056.07+480352.9, WDJ082056.07+480352.99, J0820+4803, USNO-B1.0 1380-00238971
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 20 56.43 (0.05) | 08 20 56.07 | 08 20 56.42 (0.07) | 08 20 56.43 | 08 20 56.07 (0.05) | 08 20 56.42 | 08 20 55.99 | |||||||
| Declination | 48 03 51.72 (0.04) | 48 03 52.89 | 48 03 51.76 (0.05) | 48 03 51.72 | 48 03 52.98 (0.04) | 48 03 51.76 | 48 03 46.44 | |||||||
| Spectral type | DA | DA | DA | DA7.9 | DA | |||||||||
| Effective temperature | [K] | 6391.0 (21) | 6365.0 | 6142.0 | 6515.0 (45) | |||||||||
| log(g) | [cgs] | 7.97 (0.007) | 7.97 | 7.84 | 8.02 (0.01) | |||||||||
| Mass | [M☉] | 0.575 (0.007) | 0.57 | 0.48 | 0.601 (0.01) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.9200 | 1.8230 | 1.7990 | ||||||||||
| 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] | 22.14 (0.08) | 22.18 (0.09) | 22.18 (0.09) | 22.14 | 22.14 (0.07) | 22.18 (0.09) | |||||||
| Distance | [pc] | 45.16 (0.2) | 45.09 (0.2) | 45.08 (0.2) | 45.16 | 45.16 (0.2) | 45.08 (0.2) | |||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 226.3556398 (0.07) | 226.4495337 (0.1) | 226.356 (0.07) | 226.4495337 | |||||||||
| Proper motion (declination) | [mas/yr] | -79.25124265 (0.07) | -79.31771158 (0.1) | -79.251 (0.07) | -79.31771158 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 17.70 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 16.90 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 16.16 (0.01) | 16.11 (0.09) | ||||||||||||
| H magnitude | 16.02 (0.1) | 16.02 (0.1) | ||||||||||||
| K magnitude | 15.78 (0.2) | 15.78 (0.2) | ||||||||||||
| u magnitude | 18.00 (0.01) | 18.00 (0.01) | 17.98 (0.01) | 18.00 (0.01) | 17.78 | |||||||||
| g magnitude | 17.33 (0.005) | 17.33 (0.005) | 17.33 (0.005) | 17.16 | ||||||||||
| r magnitude | 17.01 (0.005) | 17.01 (0.005) | 17.01 (0.005) | 16.92 | ||||||||||
| i magnitude | 16.90 (0.005) | 16.91 (0.005) | 16.91 (0.005) | 16.80 | ||||||||||
| z magnitude | 16.91 (0.01) | 16.91 (0.01) | 16.91 (0.01) | 16.86 | ||||||||||
| G magnitude | 17.01 (0.005) | 17.02 | 17.01 | 17.01 (0.003) | 17.02 | |||||||||
| BP magnitude | 17.26 (0.005) | 17.25 | 17.25 | |||||||||||
| RP magnitude | 16.59 (0.007) | 16.60 | 16.60 | |||||||||||
| Pan g magnitude | 17.28 (0.004) | 17.28 (0.004) | ||||||||||||
| Pan r magnitude | 17.02 (0.003) | 17.02 (0.003) | ||||||||||||
| Pan i magnitude | 16.94 (0.003) | 16.94 (0.003) | ||||||||||||
| Pan z magnitude | 16.93 (0.004) | 16.93 (0.006) | ||||||||||||
| Pan y magnitude | 16.97 (0.04) | 16.97 (0.04) | ||||||||||||
| E(B-V) | 0.001 | |||||||||||||
* 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.