WD 1648+421
All names: Gaia DR2 1356398195891529472, SDSS J165002.57+420250.4, SDSS J165002.56+420250.3, USNO-A2.0 1275-09080901, Gaia EDR3 1356398195891529472, Gaia DR3 1356398195891529472, SDSS J165002.57+420250.3, GALEX J165002.5+420250, WD 1648+421
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Tremblay et al. 2011 | Vincent et al. 2024 | 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 | 16 50 02.55 (0.1) | 16 50 02.57 | 16 50 02.55 (0.2) | 16 50 02.55 | 16 50 02.57 (0.1) | 16 50 02.57 | 16 50 01.30 | 16 50 02.57 | 16 50 02.57 | ||||||
| Declination | 42 02 50.12 (0.2) | 42 02 50.37 | 42 02 50.13 (0.2) | 42 02 50.12 | 42 02 50.36 (0.2) | 42 02 50.38 | 42 02 49.56 | 42 02 50.37 | 42 02 50.35 | ||||||
| Spectral type | DA | DA | DA | DA5.5 | DA | DA5.1 | DA | DA | |||||||
| Effective temperature | [K] | 9623.0 | 9820.0 (100) | 10078.0 (425) | 9844.0 (73) | 9739.0 (83) | 9888.0 (74) | ||||||||
| log(g) | [cgs] | 8.32 | 8.54 (0.1) | 8.45 (0.07) | 8.60 (0.1) | 8.52 (0.1) | 8.68 (0.1) | ||||||||
| Mass | [M☉] | 0.799 | 0.94 (0.07) | 0.888 (0.06) | 0.918 (0.06) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 1.0770 | 1.7378 | ||||||||||||
| 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] | 6.16 (0.2) | 6.03 (0.2) | 6.16 | 6.16 (0.2) | ||||||||||
| Distance | [pc] | 162.36 (4) | 165.80 (6) | 162.36 | 162.36 (4) | ||||||||||
| Composition | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -15.60974005 (0.2) | -16.35182442 (0.4) | -15.61 (0.2) | -15.8 | -18.0 | |||||||||
| Proper motion (declination) | [mas/yr] | -14.75984678 (0.2) | -14.58498335 (0.6) | -14.76 (0.2) | -17.5 | -18.0 | |||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 18.20 (0.3) | ||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | 18.90 (0.3) | ||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | |||||||||||||||
| H magnitude | |||||||||||||||
| K magnitude | |||||||||||||||
| u magnitude | 19.27 (0.02) | 19.27 (0.02) | 19.25 (0.02) | 19.24 | 19.25 (0.02) | 19.24 (0.02) | |||||||||
| g magnitude | 18.91 (0.009) | 18.91 (0.009) | 18.93 (0.01) | 18.92 | 18.92 (0.01) | 18.92 (0.01) | |||||||||
| r magnitude | 18.98 (0.01) | 18.98 (0.01) | 18.98 (0.01) | 18.98 | 18.98 (0.01) | 18.98 (0.01) | |||||||||
| i magnitude | 19.05 (0.01) | 19.05 (0.01) | 19.06 (0.02) | 19.05 | 19.05 (0.02) | 19.05 (0.02) | |||||||||
| z magnitude | 19.25 (0.05) | 19.25 (0.05) | 19.25 (0.05) | 19.24 | 19.25 (0.05) | 19.24 (0.05) | |||||||||
| G magnitude | 18.89 (0.02) | 18.93 | 18.89 | 18.89 (0.004) | |||||||||||
| BP magnitude | 19.01 (0.02) | 18.95 | |||||||||||||
| RP magnitude | 18.83 (0.03) | 18.75 | |||||||||||||
| Pan g magnitude | 18.91 (0.006) | ||||||||||||||
| Pan r magnitude | 18.96 (0.008) | ||||||||||||||
| Pan i magnitude | 19.09 (0.007) | ||||||||||||||
| Pan z magnitude | 19.23 (0.01) | ||||||||||||||
| Pan y magnitude | 19.32 (0.07) | ||||||||||||||
| E(B-V) | 0.018 | ||||||||||||||
* Constant surface field
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