GD 218
All names: GEN# +6.10060218, Gaia DR2 4309653752003973760, Gaia DR3 4309653752005719424, Gaia EDR3 4309653752005719424, GD 218, USNO-B1.0 1011-00455463, WD 1918+110, WD 1918+11
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | MWDD H | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2009 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 19 20 35.23 (0.04) | 19 20 35.23 (0.07) | 19 20 35.23 | 19 20 35.20 (0.04) | 19 20 35.42 | ||||||
| Declination | 11 10 42.62 (0.04) | 11 10 42.67 (0.06) | 11 10 42.62 | 11 10 44.30 (0.04) | 11 10 40.44 | ||||||
| Spectral type | DA | DA | DA | DA2.5 | DA3 | ||||||
| Effective temperature | [K] | 15976.0 | 20340.0 (359) | 19268.0 (43) | 18814.0 (334) | ||||||
| log(g) | [cgs] | 7.71 | 8.02 (0.05) | 7.81 (0.008) | 7.88 (0.02) | ||||||
| Mass | [M☉] | 0.466 | 0.64 (0.03) | 0.553 (0.01) | |||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.0989 | |||||||||
| 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] | 8.19 (0.05) | 8.33 (0.09) | 8.19 | 8.19 (0.05) | ||||||
| Distance | [pc] | 122.12 (0.8) | 120.00 (1) | 124.00 | 122.12 | 122.12 (0.8) | |||||
| Composition | H | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 30.22919413 (0.05) | 30.1869906 (0.1) | 30.229 (0.05) | |||||||
| Proper motion (declination) | [mas/yr] | -105.1134844 (0.04) | -105.2817443 (0.1) | -105.113 (0.04) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 16.10 | ||||||||||
| V magnitude | 16.23 | 16.07 | |||||||||
| R magnitude | 15.40 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 16.17 (0.002) | 16.17 | 16.17 | 16.17 (0.003) | |||||||
| BP magnitude | 16.08 (0.002) | 16.05 | |||||||||
| RP magnitude | 16.33 (0.004) | 16.32 | |||||||||
| Pan g magnitude | 16.04 (0.0008) | ||||||||||
| Pan r magnitude | 16.32 (0.004) | ||||||||||
| Pan i magnitude | 16.64 (0.003) | ||||||||||
| Pan z magnitude | 16.87 (0.004) | ||||||||||
| Pan y magnitude | 17.04 (0.005) | ||||||||||
| E(B-V) | 0.020 | ||||||||||
* Constant surface field
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