WD 0823+446A
All names: GALEX 2428709173067777212, PSO J082710.077+442950.806, SDSS J082710.07+442951.1, WD 0823+446A, Gaia DR2 917898111031536128, USNO-A2.0 1275-07276772, SDSS J082710.06+442951.0, Gaia DR2 3724857700815974016, WD 0823+446.1
| Parameter | Unit | MWDD HE | Pan-STARRS DR1 | Gaia DR2 | Gaia DR2 | Koester & Kepler (2015) | SDSS DR12 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 27 10.08 (0.4) | 08 27 10.08 (0.4) | 08 27 10.07 | 08 27 10.06 | 08 27 10.06 | 08 27 09.74 | 08 27 10.07 | ||||
| Declination | 44 29 50.68 (0.2) | 44 29 50.68 (0.2) | 44 29 51.03 | 44 29 51.01 | 44 29 51.01 | 44 29 47.76 | 44 29 51.05 | ||||
| Spectral type | DB | DB | DB | DB3.4 | DB | ||||||
| Effective temperature | [K] | 12680.0 | 14306.0 (122) | 15236.0 (184) | 14458.0 (207) | ||||||
| log(g) | [cgs] | 8.16 | 8.00 (0) | 8.42 (0.1) | 8.26 (0.1) | ||||||
| Mass | [M☉] | 0.6809999999999999 | 0.742 (0.09) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.4217 | |||||||||
| log(H/He) | -5.29 (0) | ||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | -7.78 (0) | ||||||||||
| 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] | 3.06 (0.5) | 3.06 (0.5) | ||||||||
| Distance | [pc] | 327.12 (52) | 327.12 (52) | 395.00 | |||||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 8.802368969 (0.6) | 8.802 (0.6) | 9.0 | 9.0 | ||||||
| Proper motion (declination) | [mas/yr] | -20.96774513 (0.5) | -20.968 (0.5) | -26.0 | -28.0 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 18.80 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | 19.30 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 19.34 (0.02) | 19.35 | 19.34 (0.03) | 19.34 | 19.33 (0.03) | ||||||
| g magnitude | 19.35 (0.01) | 19.34 | 19.36 (0.02) | 19.36 | 19.36 (0.02) | ||||||
| r magnitude | 19.59 (0.02) | 19.61 | 19.61 (0.02) | 19.62 | 19.61 (0.02) | ||||||
| i magnitude | 19.75 (0.02) | 19.74 | 19.75 (0.02) | 19.76 | 19.75 (0.02) | ||||||
| z magnitude | 20.05 (0.1) | 20.05 | 20.08 (0.1) | 20.07 | 20.08 (0.1) | ||||||
| G magnitude | 19.52 | 19.52 | |||||||||
| BP magnitude | 19.34 | 19.34 | |||||||||
| RP magnitude | 19.44 | 19.44 | |||||||||
| Pan g magnitude | 19.39 (0.01) | ||||||||||
| Pan r magnitude | 19.60 (0.009) | ||||||||||
| Pan i magnitude | 19.83 (0.01) | ||||||||||
| Pan z magnitude | 19.98 (0.05) | ||||||||||
| Pan y magnitude | 20.17 (0.2) | ||||||||||
* Constant surface field
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