WD 0939+448
All names: J0942+4437, LSPM J0942+4437, NLTT 22388, SDSS J094244.96+443743.0, WD 0939+448, USNO-B1.0 1346-00215063, Gaia DR2 820899298308206208, Gaia EDR3 820899298308206208, SDSS J094244.96+443743.1, WDJ094244.99+443743.44, LP 166-16, SDSS J094244.95+443743.0, Gaia DR3 820899298308206208
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 42 44.78 (0.1) | 09 42 44.79 (0.2) | 09 42 44.78 | 09 42 44.99 (0.1) | 09 42 44.79 | 09 42 44.45 | |||||||
| Declination | 44 37 40.43 (0.1) | 44 37 40.52 (0.2) | 44 37 40.43 | 44 37 43.44 (0.1) | 44 37 40.52 | 44 37 40.44 | |||||||
| Spectral type | DC | DC | DC | DC | DC: | DC | DC12.4 | ||||||
| Effective temperature | [K] | 4570.0 (34) | 4625.0 (35) | 4631.0 | 4326.0 | ||||||||
| log(g) | [cgs] | 7.23 (0.02) | 7.13 (0.03) | 6.96 | 6.57 | ||||||||
| Mass | [M☉] | 0.292 (0.008) | 0.218 (0.01) | 0.157 | 0.076 | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 3.0900 | |||||||||||
| 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] | 12.77 (0.2) | 12.56 (0.2) | 12.56 (0.2) | 12.77 | 12.77 (0.2) | 12.56 (0.2) | ||||||
| Distance | [pc] | 78.29 (1) | 79.62 (2) | 79.62 (2) | 78.29 | 78.29 (1) | 79.62 (2) | ||||||
| Composition | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -139.9612586 (0.2) | -140.0291579 (0.3) | -139.961 (0.2) | -140.0291579 | ||||||||
| Proper motion (declination) | [mas/yr] | -188.2131828 (0.1) | -188.5218588 (0.5) | -188.213 (0.1) | -188.5218588 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 19.80 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 19.00 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 17.15 (0.04) | 17.15 (0.04) | |||||||||||
| H magnitude | 16.97 (0.04) | 16.97 (0.04) | |||||||||||
| K magnitude | 16.86 (0.04) | 16.86 (0.04) | |||||||||||
| u magnitude | 21.44 (0.08) | 21.44 (0.08) | 21.35 (0.1) | 21.36 | |||||||||
| g magnitude | 19.47 (0.01) | 19.48 (0.01) | 19.44 | ||||||||||
| r magnitude | 18.55 (0.009) | 18.55 (0.009) | 18.56 | ||||||||||
| i magnitude | 18.20 (0.009) | 18.17 (0.009) | 18.19 | ||||||||||
| z magnitude | 18.02 (0.02) | 18.01 (0.02) | 18.00 | ||||||||||
| G magnitude | 18.59 (0.02) | 18.61 | 18.59 | 18.59 (0.003) | 18.61 | ||||||||
| BP magnitude | 19.20 (0.02) | 19.20 | 19.20 | ||||||||||
| RP magnitude | 17.87 (0.01) | 17.87 | 17.87 | ||||||||||
| Pan g magnitude | 19.31 (0.01) | 19.31 (0.02) | |||||||||||
| Pan r magnitude | 18.56 (0.01) | 18.56 (0.01) | |||||||||||
| Pan i magnitude | 18.23 (0.004) | 18.23 (0.004) | |||||||||||
| Pan z magnitude | 18.15 (0.009) | 18.15 (0.007) | |||||||||||
| Pan y magnitude | 18.07 (0.02) | 18.07 (0.02) | |||||||||||
| E(B-V) | 0.003 | ||||||||||||
* Constant surface field
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