WD 0817+341
All names: SDSS J082049.22+335715.2, WD 0817+341, SDSS J082049.23+335715.1, Gaia EDR3 901837785202856832, Gaia DR2 901837785202856832, Gaia DR3 901837785202856832
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 20 49.21 (0.4) | 08 20 49.23 | 08 20 49.21 (0.5) | 08 20 49.23 (0.4) | 08 20 48.79 | ||||||
| Declination | 33 57 14.78 (0.3) | 33 57 15.23 | 33 57 14.79 (0.4) | 33 57 15.26 (0.3) | 33 57 10.08 | ||||||
| Spectral type | DC:+M | DC:+M | DC | DC: M | DC | ||||||
| Effective temperature | [K] | 9645.0 | 10171.0 | ||||||||
| log(g) | [cgs] | 7.23 | 7.24 | ||||||||
| Mass | [M☉] | 0.269 | 0.256 | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.3179 | 0.2949 | ||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.85 (0.5) | 1.79 (0.6) | 1.85 (0.5) | |||||||
| Distance | [pc] | 541.67 (141) | 557.76 (200) | 541.68 (141) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -19.82303195 (0.4) | -19.70087324 (1) | -19.823 (0.4) | |||||||
| Proper motion (declination) | [mas/yr] | -29.94281689 (0.3) | -29.47551729 (0.7) | -29.943 (0.3) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | yes | ||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.00 (0.04) | 20.01 (0.04) | 20.04 | ||||||||
| g magnitude | 19.86 (0.01) | 19.87 (0.01) | 19.88 | ||||||||
| r magnitude | 20.01 (0.02) | 20.00 (0.02) | 20.01 | ||||||||
| i magnitude | 20.18 (0.03) | 20.18 (0.03) | 20.18 | ||||||||
| z magnitude | 20.26 (0.09) | 20.27 (0.1) | 20.26 | ||||||||
| G magnitude | 19.94 (0.06) | 20.00 | 19.94 (0.006) | ||||||||
| BP magnitude | 20.01 (0.06) | 19.91 | |||||||||
| RP magnitude | 19.87 (0.09) | 19.76 | |||||||||
| Pan g magnitude | 19.91 (0.02) | ||||||||||
| Pan r magnitude | 20.08 (0.01) | ||||||||||
| Pan i magnitude | 20.19 (0.02) | ||||||||||
| Pan z magnitude | 20.23 (0.04) | ||||||||||
| Pan y magnitude | 19.70 (0.2) | ||||||||||
| E(B-V) | 0.031 | ||||||||||
* Constant surface field
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