WD 1644+410
All names: GALEX J164547.9+405819, SDSS J164547.87+405819.1, Gaia DR3 1356230412992772864, SDSS J164547.87+405819.2, SDSS J164547.86+405819.2, Gaia DR2 1356230412992772864, WD 1644+410, Gaia EDR3 1356230412992772864, SDSS J164547.86+405819.1
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 45 47.90 (0.1) | 16 45 47.87 | 16 45 47.90 (0.2) | 16 45 47.90 | 16 45 47.87 (0.1) | 16 45 47.86 | 16 45 46.75 | 16 45 47.87 | ||||||
| Declination | 40 58 18.51 (0.2) | 40 58 19.19 | 40 58 18.54 (0.2) | 40 58 18.51 | 40 58 19.25 (0.2) | 40 58 19.24 | 40 58 13.80 | 40 58 19.25 | ||||||
| Spectral type | DC | DC | DC | DC+M | DC | DC | DCM: | DC | ||||||
| Effective temperature | [K] | 8566.0 | 8297.0 | 8026.0 (303) | 10082.0 (8) | 10082.0 (8) | ||||||||
| log(g) | [cgs] | 8.31 | 8.22 | 8.06 (0.07) | 7.73 (0.5) | 9.57 (0.5) | ||||||||
| Mass | [M☉] | 0.791 | 0.718 | 0.614 (0.06) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.4550 | 1.4220 | |||||||||||
| log(H/He) | ||||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | ||||||||||||||
| log(Ca/H) | ||||||||||||||
| Parallax | [mas] | 7.13 (0.2) | 7.31 (0.3) | 7.13 | 7.13 (0.2) | |||||||||
| Distance | [pc] | 140.27 (4) | 136.78 (5) | 140.27 | 140.27 (4) | |||||||||
| Composition | ||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 24.22096445 (0.2) | 24.28165376 (0.3) | 24.221 (0.2) | 28.6 | |||||||||
| Proper motion (declination) | [mas/yr] | -46.3397394 (0.2) | -45.93122624 (0.5) | -46.34 (0.2) | -48.7 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.30 (0.02) | 19.30 (0.02) | 19.28 (0.02) | 19.28 | 19.27 (0.02) | |||||||||
| g magnitude | 18.94 (0.009) | 18.94 (0.009) | 18.96 (0.02) | 18.91 | 18.96 (0.02) | |||||||||
| r magnitude | 18.89 (0.01) | 18.89 (0.01) | 18.89 (0.01) | 18.89 | 18.88 (0.01) | |||||||||
| i magnitude | 19.00 (0.01) | 19.00 (0.01) | 18.96 (0.01) | 18.95 | 18.96 (0.01) | |||||||||
| z magnitude | 19.09 (0.05) | 19.09 (0.05) | 19.07 (0.05) | 19.05 | 19.07 (0.05) | |||||||||
| G magnitude | 18.85 (0.03) | 18.88 | 18.85 | 18.85 (0.004) | ||||||||||
| BP magnitude | 19.02 (0.03) | 18.91 | ||||||||||||
| RP magnitude | 18.70 (0.03) | 18.57 | ||||||||||||
| Pan g magnitude | 18.93 (0.007) | |||||||||||||
| Pan r magnitude | 18.90 (0.01) | |||||||||||||
| Pan i magnitude | 18.98 (0.005) | |||||||||||||
| Pan z magnitude | 19.09 (0.01) | |||||||||||||
| Pan y magnitude | 19.17 (0.03) | |||||||||||||
| E(B-V) | 0.016 | |||||||||||||
* Constant surface field
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