SDSS J084728.32+081409.5
All names: SDSS J084728.33+081409.5, SDSS J084728.33+081409.60, Gaia DR2 597047217748033920, Gaia EDR3 597047217748033920, SDSS J084728.33+081409.6, SDSS J084728.32+081409.5, Gaia DR3 597047217748033920, WD 0844+084
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | MWDD HE | 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 47 28.33 (0.3) | 08 47 28.33 | 08 47 28.33 (0.4) | 08 47 28.33 (0.3) | 08 47 28.33 | 08 47 28.06 | 08 47 28.33 | |||||||
| Declination | 08 14 09.49 (0.2) | 08 14 09.55 | 08 14 09.50 (0.2) | 08 14 09.59 (0.2) | 08 14 09.58 | 08 14 07.44 | 08 14 09.59 | |||||||
| Spectral type | DB | DB | DB | DB | DB | DB | ||||||||
| Effective temperature | [K] | 24005.0 | 19099.0 | 15201.0 | 22450.0 (1550) | 24419.0 (1432) | ||||||||
| log(g) | [cgs] | 8.06 | 8.62 | 8.37 | 8.18 (0.1) | 8.06 (0.1) | ||||||||
| Mass | [M☉] | 0.638 | 0.985 | 0.824 | 0.637 (0.07) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 0.3598 | ||||||||||||
| log(H/He) | <-4.349 | |||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | ||||||||||||||
| log(Ca/H) | ||||||||||||||
| log(N/He) | ||||||||||||||
| log(O/He) | ||||||||||||||
| log(Na/He) | ||||||||||||||
| log(Mg/He) | ||||||||||||||
| log(Al/He) | ||||||||||||||
| log(Si/He) | ||||||||||||||
| log(P/He) | ||||||||||||||
| log(S/He) | ||||||||||||||
| log(Cl/He) | ||||||||||||||
| log(Sc/He) | ||||||||||||||
| log(Ti/He) | ||||||||||||||
| log(V/He) | ||||||||||||||
| log(Cr/He) | ||||||||||||||
| log(Mn/He) | ||||||||||||||
| log(Fe/He) | ||||||||||||||
| log(Co/He) | ||||||||||||||
| log(Ni/He) | ||||||||||||||
| log(Cu/He) | ||||||||||||||
| log(Zn/He) | ||||||||||||||
| log(Ga/He) | ||||||||||||||
| log(Ge/He) | ||||||||||||||
| log(Sr/He) | ||||||||||||||
| Parallax | [mas] | 1.73 (0.4) | 3.06 (0.6) | 1.73 (0.4) | ||||||||||
| Distance | [pc] | 578.24 (129) | 326.76 (59) | 578.24 (129) | ||||||||||
| Composition | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -3.287872463 (0.4) | -1.846526316 (0.8) | -3.288 (0.4) | -6.1 | |||||||||
| Proper motion (declination) | [mas/yr] | -5.963970136 (0.2) | -6.958493203 (0.4) | -5.964 (0.2) | -9.9 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.15 (0.02) | 19.15 (0.02) | 19.19 (0.03) | 19.18 | 19.18 (0.03) | |||||||||
| g magnitude | 19.21 (0.01) | 19.21 (0.01) | 19.23 (0.02) | 19.22 | 19.21 (0.02) | |||||||||
| r magnitude | 19.56 (0.01) | 19.56 (0.01) | 19.56 (0.01) | 19.55 | 19.56 (0.01) | |||||||||
| i magnitude | 19.84 (0.02) | 19.84 (0.02) | 19.85 (0.03) | 19.84 | 19.82 (0.02) | |||||||||
| z magnitude | 20.18 (0.1) | 20.18 (0.1) | 20.21 (0.1) | 20.20 | 20.18 (0.1) | |||||||||
| G magnitude | 19.36 (0.03) | 19.43 | 19.36 (0.004) | |||||||||||
| BP magnitude | 19.31 (0.03) | 19.33 | ||||||||||||
| RP magnitude | 19.65 (0.06) | 19.53 | ||||||||||||
| Pan g magnitude | 19.24 (0.02) | |||||||||||||
| Pan r magnitude | 19.56 (0.008) | |||||||||||||
| Pan i magnitude | 19.87 (0.03) | |||||||||||||
| Pan z magnitude | 20.11 (0.03) | |||||||||||||
| Pan y magnitude | 20.06 (0.01) | |||||||||||||
| E(B-V) | 0.031 | |||||||||||||
* Constant surface field
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