WD 1657+321
All names: WD 1657+321, J1659+3203, Gaia DR2 1313405848136604672, PSO J254.9158+32.0548, TIC 159432267, SDSS J165939.99+320320.1, NLTT 43985, LP 331-27, Gaia EDR3 1313405848136604672, SDSS J165939.99+320320.2, 2MASS J16594004+3203204, LSPM J1659+3203, WDJ165940.02+320320.46, Gaia DR3 1313405848136604672, SDSS J165940.00+320320.1, USNO-B1.0 1220-00304788
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | Kilic et al. 2020 | McCleery et al. 2020 | Blouin et al. 2019 | MWDD H | Gaia DR2 | Stilism | Giammichele et al. 2012 | Kawka et Vennes 2006 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 59 39.72 (0.05) | 16 59 39.73 (0.06) | 16 59 39.73 (0.06) | 16 59 39.72 | 16 59 40.02 (0.05) | 16 59 39.73 | 16 59 39.38 | |||||||||||
| Declination | 32 03 16.58 (0.06) | 32 03 16.70 (0.07) | 32 03 16.70 (0.07) | 32 03 16.58 | 32 03 20.46 (0.06) | 32 03 16.70 | 32 03 17.28 | |||||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA | DA7.8 | ||||||
| Effective temperature | [K] | 6404.0 (24) | 6407.0 (66) | 6408.0 (22) | 6403.0 (24) | 6288.5 (70) | 6340.0 (45) | 6357.0 | 6370.0 (183) | 6490.0 (80) | 6375.0 (48) | |||||||
| log(g) | [cgs] | 8.47 (0.006) | 8.47 (0.03) | 8.47 (0.006) | 8.47 (0.006) | 8.44 (0.03) | 8.46 (0.02) | 8.46 | (0) | 8.76 (0.2) | 8.47 (0.01) | |||||||
| Mass | [M☉] | 0.896 (0.005) | 0.897 (0.02) | 0.896 (0.005) | 0.895 (0.006) | 0.887 (0.01) | 0.886 | 0.59 (0) | 1.07 (0.1) | 0.894 (0.01) | ||||||||
| log(Luminosity) | [L☉] | -3.62 | ||||||||||||||||
| Cooling age | [Gyr] | 4.8400 | 4.5170 (0.09) | 4.4880 | 1.9200 | |||||||||||||
| 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] | 26.71 (0.06) | 26.71 (0.06) | 26.70 (0.08) | 26.70 (0.08) | 26.70 (0.08) | 26.70 (0.08) | 26.71 | 26.71 (0.06) | 26.70 (0.08) | ||||||||
| Distance | [pc] | 37.43 (0.09) | 37.44 (0.08) | 37.45 (0.1) | 37.45 (0.1) | 37.45 (0.1) | 37.45 (0.1) | 51.70 (2) | 22.00 | 37.43 | 37.43 (0.09) | 37.45 (0.1) | ||||||
| Composition | H | H | H | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -240.1858467 (0.06) | -240.1590802 (0.1) | -240.186 (0.06) | -240.1590802 | |||||||||||||
| Proper motion (declination) | [mas/yr] | -242.3358572 (0.07) | -242.4826951 (0.2) | -242.336 (0.07) | -242.4826951 | |||||||||||||
| Variability | ||||||||||||||||||
| Magnetic | ||||||||||||||||||
| Bd | [MG] | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||
| Binarity | ||||||||||||||||||
| B magnitude | 17.30 | |||||||||||||||||
| V magnitude | ||||||||||||||||||
| R magnitude | 17.00 | |||||||||||||||||
| I magnitude | ||||||||||||||||||
| J magnitude | 16.52 (0.02) | 16.46 (0.1) | 16.46 (0.1) | |||||||||||||||
| H magnitude | ||||||||||||||||||
| K magnitude | 15.73 (0.2) | 15.73 (0.2) | 15.73 (0.2) | |||||||||||||||
| u magnitude | 18.36 (0.02) | 18.36 (0.01) | 18.36 (0.01) | 0.68 | ||||||||||||||
| g magnitude | 17.66 | 17.61 (0.005) | 17.64 (0.005) | |||||||||||||||
| r magnitude | 17.36 | 17.36 (0.007) | 17.35 (0.006) | |||||||||||||||
| i magnitude | 17.28 | 17.27 (0.004) | 17.27 (0.006) | |||||||||||||||
| z magnitude | 17.24 | 17.27 (0.003) | 17.26 (0.01) | |||||||||||||||
| G magnitude | 17.35 (0.006) | 17.36 | 17.36 | 17.35 | 17.35 (0.003) | 17.36 | ||||||||||||
| BP magnitude | 17.61 (0.006) | 17.61 | 17.61 | |||||||||||||||
| RP magnitude | 16.95 (0.005) | 16.95 | 16.95 | |||||||||||||||
| Pan g magnitude | 17.61 (0.004) | 17.61 (0.005) | 17.61 (0.005) | |||||||||||||||
| Pan r magnitude | 17.36 (0.007) | 17.36 (0.007) | 17.36 (0.007) | |||||||||||||||
| Pan i magnitude | 17.27 (0.004) | 17.27 (0.004) | 17.27 (0.004) | |||||||||||||||
| Pan z magnitude | 17.27 (0.004) | 17.27 (0.003) | 17.27 (0.003) | |||||||||||||||
| Pan y magnitude | 17.29 (0.009) | 17.29 (0.009) | 17.29 (0.009) | |||||||||||||||
| E(B-V) | 0.003 | |||||||||||||||||
* Constant surface field
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