SDSS J082420.99+281659.4
All names: GALEX J082420.9+281659, SDSS J082421.00+281659.3, SDSS J082420.99+281659.3, Gaia DR3 707358814181066496, SDSS J082421.00+281659.4, Gaia DR2 707358814181066496, Gaia EDR3 707358814181066496, WD 0821+284, SDSS J082420.99+281659.4
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 24 21.00 (0.4) | 08 24 21.00 | 08 24 21.00 (0.6) | 08 24 21.00 (0.4) | 08 24 21.00 | 08 24 21.02 | 08 24 21.00 | |||||
| Declination | 28 16 59.35 (0.3) | 28 16 59.40 | 28 16 59.35 (0.4) | 28 16 59.39 (0.3) | 28 16 59.40 | 28 16 57.00 | 28 16 59.40 | |||||
| Spectral type | DA | DA | DA_auto | DA | DA | DA | ||||||
| Effective temperature | [K] | 18880.0 | 19976.0 (721) | 20112.0 (698) | ||||||||
| log(g) | [cgs] | 8.62 | 7.86 (0.1) | 7.95 (0.1) | ||||||||
| Mass | [M☉] | 1.004 | 0.597 (0.07) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.2882 | ||||||||||
| 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] | 1.85 (0.5) | 2.35 (0.7) | 1.85 (0.5) | ||||||||
| Distance | [pc] | 540.21 (142) | 425.94 (131) | 540.22 (142) | ||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -5.601444905 (0.5) | -4.265809937 (1) | -5.601 (0.5) | -3.1 | |||||||
| Proper motion (declination) | [mas/yr] | -2.275306911 (0.3) | -2.001070902 (0.8) | -2.275 (0.3) | -16.1 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 19.91 (0.03) | 19.91 (0.04) | 19.96 (0.04) | 19.96 | 19.92 (0.04) | |||||||
| g magnitude | 19.86 (0.02) | 19.86 (0.02) | 19.89 (0.02) | 19.89 | 19.87 (0.02) | |||||||
| r magnitude | 20.23 (0.03) | 20.23 (0.03) | 20.22 (0.03) | 20.22 | 20.22 (0.03) | |||||||
| i magnitude | 20.57 (0.05) | 20.57 (0.05) | 20.58 (0.05) | 20.58 | 20.56 (0.05) | |||||||
| z magnitude | 20.83 (0.2) | 20.83 (0.2) | 20.83 (0.2) | 20.83 | 20.81 (0.2) | |||||||
| G magnitude | 20.07 (0.09) | 20.12 | 20.07 (0.006) | |||||||||
| BP magnitude | 19.97 (0.09) | 19.72 | ||||||||||
| RP magnitude | 19.98 (0.1) | 19.76 | ||||||||||
| Pan g magnitude | 19.91 (0.02) | |||||||||||
| Pan r magnitude | 20.23 (0.01) | |||||||||||
| Pan i magnitude | 20.55 (0.02) | |||||||||||
| Pan z magnitude | 20.77 (0.05) | |||||||||||
| Pan y magnitude | 20.51 (0.2) | |||||||||||
| E(B-V) | 0.025 | |||||||||||
* Constant surface field
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