All names: SDSS J081801.38+400825.26, Gaia DR2 909338859685582976, SDSS J081801.38+400825.2, SDSS J081801.34+400825.3, SDSS J081801.37+400825.2, Gaia EDR3 909338863981936512, Gaia DR3 909338863981936512
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 18 01.38 (0.3) | 08 18 01.35 | 08 18 01.38 (0.4) | 08 18 01.35 (0.3) | |||||
| Declination | 40 08 25.29 (0.2) | 40 08 25.32 | 40 08 25.29 (0.2) | 40 08 25.35 (0.2) | |||||
| Spectral type | DA | DA | DA | ||||||
| Effective temperature | [K] | 25579.0 (206) | |||||||
| log(g) | [cgs] | 8.10 (0.03) | |||||||
| Mass | [M☉] | 0.685 (0.02) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 1.74 (0.4) | 1.77 (0.5) | 1.74 (0.4) | |||||
| Distance | [pc] | 575.18 (127) | 566.29 (162) | 575.18 (127) | |||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 24.63 (0.3) | 24.96227031 (0.7) | 24.63 (0.3) | |||||
| Proper motion (declination) | [mas/yr] | -3.677 (0.3) | -3.729110833 (0.4) | -3.677 (0.3) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 19.15 (0.02) | 19.13 (0.03) | 19.15 (0.02) | ||||||
| g magnitude | 19.14 (0.01) | 19.15 (0.02) | 19.14 (0.01) | ||||||
| r magnitude | 19.45 (0.01) | 19.46 (0.02) | 19.45 (0.01) | ||||||
| i magnitude | 19.84 (0.02) | 19.85 (0.04) | 19.84 (0.03) | ||||||
| z magnitude | 20.15 (0.1) | 20.16 (0.1) | 20.15 (0.1) | ||||||
| G magnitude | 19.30 (0.005) | 19.34 | 19.30 (0.005) | ||||||
| BP magnitude | 19.30 (0.05) | 19.14 | |||||||
| RP magnitude | 19.44 (0.06) | 19.56 | |||||||
| Pan g magnitude | 19.17 (0.009) | ||||||||
| Pan r magnitude | 19.48 (0.006) | ||||||||
| Pan i magnitude | 19.79 (0.01) | ||||||||
| Pan z magnitude | 20.00 (0.05) | ||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.038 | ||||||||
* 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.