WD 1721+561
All names: SDSS J172244.49+560819.0, WD 1721+561, Gaia DR3 1420754879207990528, Gaia EDR3 1420754879207990528, Gaia DR2 1420754879207512960, SDSS J172244.48+560819.0
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 22 44.51 (0.5) | 17 22 44.49 | 17 22 44.51 (0.9) | 17 22 44.49 (0.5) | 17 22 44.49 | 17 22 43.49 | 17 22 44.48 | 17 22 44.48 | ||||
| Declination | 56 08 18.46 (0.5) | 56 08 19.02 | 56 08 18.48 (0.9) | 56 08 19.04 (0.5) | 56 08 19.04 | 56 08 15.72 | 56 08 19.04 | 56 08 19.03 | ||||
| Spectral type | DA | DA5 | DA | DA5.6 | DA | DA | ||||||
| Effective temperature | [K] | 12230.0 | 8994.0 (100) | 8853.0 (183) | 9019.0 (97) | |||||||
| log(g) | [cgs] | 8.87 | 8.88 (0.1) | 8.56 (0.3) | 8.90 (0.1) | |||||||
| Mass | [M☉] | 1.137 | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 1.5880 | ||||||||||
| 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] | 3.50 (0.6) | 3.68 (0.9) | 3.50 (0.6) | ||||||||
| Distance | [pc] | 285.46 (46) | 271.58 (65) | 285.46 (46) | ||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 11.91489775 (0.7) | 10.95608162 (2) | 11.915 (0.7) | 13.9 | 12.0 | ||||||
| Proper motion (declination) | [mas/yr] | -35.86510716 (0.7) | -35.98516189 (2) | -35.865 (0.7) | -40.8 | -39.0 | ||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 20.79 (0.06) | 20.81 (0.07) | 20.79 (0.07) | 20.80 | 20.78 (0.07) | 20.80 (0.07) | ||||||
| g magnitude | 20.32 (0.02) | 20.33 (0.02) | 20.33 (0.02) | 20.33 | 20.32 (0.02) | 20.33 (0.02) | ||||||
| r magnitude | 20.29 (0.03) | 20.29 (0.03) | 20.29 (0.03) | 20.29 | 20.29 (0.03) | 20.29 (0.03) | ||||||
| i magnitude | 20.31 (0.04) | 20.31 (0.04) | 20.32 (0.04) | 20.31 | 20.31 (0.04) | 20.31 (0.04) | ||||||
| z magnitude | 20.96 (0.2) | 20.93 (0.2) | 20.92 (0.2) | 20.95 | 20.92 (0.2) | 20.95 (0.2) | ||||||
| G magnitude | 20.25 (0.06) | 20.31 | 20.25 (0.008) | |||||||||
| BP magnitude | 20.31 (0.06) | 20.42 | ||||||||||
| RP magnitude | 20.02 (0.09) | 20.04 | ||||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.022 | |||||||||||
* Constant surface field
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