NLTT 20031
All names: Gaia DR3 3079177262706260736, LP 545-40, LSPM J0840+0247, SDSS J084052.73+024712.3, SDSS J084052.72+024712.3, Gaia EDR3 3079177262706260736, Gaia DR2 3079177262706260736, USNO-B1.0 0927-00217687, NLTT 20031, WD 0838+029
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Tremblay et al. 2011 | 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 | 08 40 52.69 (0.1) | 08 40 52.73 | 08 40 52.70 (0.2) | 08 40 52.69 | 08 40 52.73 (0.1) | 08 40 52.73 | 08 40 52.32 | 08 40 52.73 | ||||||
| Declination | 02 47 09.33 (0.09) | 02 47 12.31 | 02 47 09.43 (0.1) | 02 47 09.33 | 02 47 12.56 (0.09) | 02 47 12.33 | 02 47 11.40 | 02 47 12.31 | ||||||
| Spectral type | DA | DA | DA | DA | DA_auto | DA | DA | DA | ||||||
| Effective temperature | [K] | 7385.0 | 7330.0 (70) | 7458.0 (169) | 7762.0 (49) | 7245.0 (45) | ||||||||
| log(g) | [cgs] | 7.92 | 7.92 (0.1) | 7.95 (0.05) | 8.60 (0.1) | 7.82 (0.1) | ||||||||
| Mass | [M☉] | 0.544 | 0.55 (0.07) | 0.563 (0.04) | 0.5 (0.05) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.1770 | 1.2303 | |||||||||||
| 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] | 8.00 (0.2) | 7.92 (0.2) | 8.00 | 8.00 (0.2) | |||||||||
| Distance | [pc] | 124.98 (3) | 126.25 (4) | 124.98 | 124.98 (3) | |||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -29.35968257 (0.2) | -29.51749561 (0.4) | -29.36 (0.2) | -24.0 | |||||||||
| Proper motion (declination) | [mas/yr] | -201.8448695 (0.2) | -201.8044307 (0.3) | -201.845 (0.2) | -201.1 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 18.30 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 18.00 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 18.08 (0.05) | |||||||||||||
| H magnitude | 18.01 (0.08) | |||||||||||||
| K magnitude | 17.80 (0.1) | |||||||||||||
| u magnitude | 19.32 (0.03) | 19.32 (0.03) | 19.28 (0.03) | 19.28 | 19.33 (0.03) | |||||||||
| g magnitude | 18.78 (0.009) | 18.79 (0.009) | 18.77 (0.02) | 18.76 | 18.78 (0.02) | |||||||||
| r magnitude | 18.63 (0.009) | 18.62 (0.009) | 18.63 (0.02) | 18.62 | 18.63 (0.02) | |||||||||
| i magnitude | 18.62 (0.01) | 18.62 (0.01) | 18.62 (0.01) | 18.62 | 18.62 (0.01) | |||||||||
| z magnitude | 18.69 (0.04) | 18.69 (0.04) | 18.69 (0.04) | 18.68 | 18.69 (0.04) | |||||||||
| G magnitude | 18.61 (0.02) | 18.64 | 18.61 | 18.61 (0.003) | ||||||||||
| BP magnitude | 18.76 (0.02) | 18.76 | ||||||||||||
| RP magnitude | 18.32 (0.03) | 18.32 | ||||||||||||
| Pan g magnitude | 18.78 (0.01) | |||||||||||||
| Pan r magnitude | 18.65 (0.003) | |||||||||||||
| Pan i magnitude | 18.66 (0.007) | |||||||||||||
| Pan z magnitude | 18.70 (0.01) | |||||||||||||
| Pan y magnitude | 18.79 (0.02) | |||||||||||||
| E(B-V) | 0.006 | |||||||||||||
* Constant surface field
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