US 646
All names: Gaia EDR3 818462608742439552, Gaia DR3 818462608742439552, WD 0925+458, US 646, GALEX J092908.3+453630, SDSS J092908.40+453629.1, SDSS J092908.41+453629.2, SDSS J092908.38+453628.6, SDSS J092908.41+453629.1, Gaia DR2 818462608742439552, USNO-A2.0 1350-07601313
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 29 08.39 (0.2) | 09 29 08.39 (0.2) | 09 29 08.39 | 09 29 08.42 (0.2) | 09 29 08.41 | 09 29 08.04 | 09 29 08.41 | ||||||
| Declination | 45 36 28.58 (0.1) | 45 36 28.60 (0.2) | 45 36 28.58 | 45 36 29.20 (0.1) | 45 36 29.18 | 45 36 27.72 | 45 36 29.18 | ||||||
| Spectral type | DC | DC | DC | DC | DC: | DC: | DC | DC | |||||
| Effective temperature | [K] | 10779.0 | 10777.0 | 11327.0 (620) | 10802.0 (296) | 10961.0 (341) | |||||||
| log(g) | [cgs] | 8.50 | 8.44 | 8.49 (0.08) | 8.38 (0.5) | 9.56 (0.3) | |||||||
| Mass | [M☉] | 0.922 | 0.865 | 0.898 (0.07) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 1.1100 | 0.9959 | ||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| Parallax | [mas] | 5.49 (0.3) | 5.50 (0.3) | 5.49 | 5.49 (0.3) | ||||||||
| Distance | [pc] | 182.05 (8) | 181.74 (11) | 182.05 | 182.05 (8) | ||||||||
| Composition | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -24.57073431 (0.2) | -24.97708502 (0.4) | -24.571 (0.2) | -29.5 | ||||||||
| Proper motion (declination) | [mas/yr] | -38.92787201 (0.2) | -38.40815233 (0.4) | -38.928 (0.2) | -45.2 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 18.90 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 19.11 (0.03) | 19.12 (0.06) | 19.12 | 19.14 (0.05) | |||||||||
| g magnitude | 18.98 (0.01) | 18.99 (0.03) | 18.99 | 18.99 (0.03) | |||||||||
| r magnitude | 19.14 (0.01) | 19.14 (0.03) | 19.14 | 19.13 (0.03) | |||||||||
| i magnitude | 19.31 (0.02) | 19.30 (0.03) | 19.30 | 19.29 (0.02) | |||||||||
| z magnitude | 19.51 (0.07) | 19.50 (0.07) | 19.50 | 19.50 (0.07) | |||||||||
| G magnitude | 19.05 (0.02) | 19.10 | 19.05 | 19.05 (0.004) | |||||||||
| BP magnitude | 19.05 (0.02) | 18.96 | |||||||||||
| RP magnitude | 19.05 (0.03) | 18.99 | |||||||||||
| Pan g magnitude | 19.02 (0.01) | ||||||||||||
| Pan r magnitude | 19.11 (0.008) | ||||||||||||
| Pan i magnitude | 19.33 (0.01) | ||||||||||||
| Pan z magnitude | 19.49 (0.01) | ||||||||||||
| Pan y magnitude | 19.53 (0.03) | ||||||||||||
| E(B-V) | 0.009 | ||||||||||||
* Constant surface field
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