SDSS J080916.50+201248.2
All names: SDSS J080916.50+201248.20, Gaia DR3 669877184344846720, Gaia EDR3 669877184344846720, GALEX J080916.4+201248, SDSS J080916.49+201248.1, Gaia DR2 669877184344846720, SDSS J080916.50+201248.2
| 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 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 09 16.48 (0.3) | 08 09 16.50 | 08 09 16.48 (0.4) | 08 09 16.51 (0.3) | 08 09 16.50 | |||||||
| Declination | 20 12 48.11 (0.2) | 20 12 48.13 | 20 12 48.11 (0.3) | 20 12 48.27 (0.2) | 20 12 48.20 | |||||||
| Spectral type | DB | DB | DB | DB+MS | ||||||||
| Effective temperature | [K] | 12482.0 | 13457.0 | 12265.0 | 13390.0 (569) | |||||||
| log(g) | [cgs] | 7.37 | 8.02 | 7.91 | 8.56 (0.5) | |||||||
| Mass | [M☉] | 0.302 | 0.596 | 0.536 | 0.937 (0.3) | |||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.3192 | ||||||||||
| log(H/He) | <-6.142 | |||||||||||
| 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] | 1.71 (0.3) | 2.40 (0.5) | 1.71 (0.3) | ||||||||
| Distance | [pc] | 583.53 (114) | 417.40 (91) | 583.53 (114) | ||||||||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -21.6669596 (0.4) | -21.36197161 (0.8) | -21.667 (0.4) | ||||||||
| Proper motion (declination) | [mas/yr] | -10.37945382 (0.2) | -10.76370588 (0.5) | -10.379 (0.2) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | |||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 19.62 (0.03) | 19.62 (0.03) | 19.60 (0.03) | |||||||||
| g magnitude | 19.60 (0.01) | 19.60 (0.01) | 19.63 (0.02) | |||||||||
| r magnitude | 19.84 (0.02) | 19.84 (0.02) | 19.81 (0.02) | |||||||||
| i magnitude | 20.03 (0.03) | 20.03 (0.03) | 20.07 (0.03) | |||||||||
| z magnitude | 20.14 (0.1) | 20.14 (0.1) | 20.23 (0.1) | |||||||||
| G magnitude | 19.71 (0.04) | 19.76 | 19.71 (0.005) | |||||||||
| BP magnitude | 19.79 (0.04) | 19.71 | ||||||||||
| RP magnitude | 19.75 (0.08) | 19.72 | ||||||||||
| Pan g magnitude | 19.65 (0.01) | |||||||||||
| Pan r magnitude | 19.88 (0.02) | |||||||||||
| Pan i magnitude | 20.05 (0.009) | |||||||||||
| Pan z magnitude | 20.25 (0.03) | |||||||||||
| Pan y magnitude | 20.15 (0.1) | |||||||||||
| E(B-V) | 0.032 | |||||||||||
* Constant surface field
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