WD 1844-223
All names: WD 1844-223, RE J184757-221929, Gaia DR2 4078868662206175744, USNO-B1.0 0676-00898257, RE J1847-221, RE J1847-22, WDJ184756.52-221937.78, EUVE J1847-22.3, 2RE J1847-221, 1RXS J184756.1-221938, Gaia EDR3 4078868662206175744, 2RE J184756-221937, Gaia DR3 4078868662206175744, 2EUVE J1847-22.3, RX J1847.9-2219, GALEX J184756.5-221940
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | MWDD H | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 47 56.62 (0.04) | 18 47 56.61 (0.05) | 18 47 56.62 | 18 47 56.52 (0.04) | 18 47 56.61 | 18 47 56.71 | |||||
| Declination | -22 19 38.36 (0.03) | -22 19 38.35 (0.06) | -22 19 38.36 | -22 19 37.77 (0.03) | -22 19 38.35 | -22 19 38.28 | |||||
| Spectral type | DA | DA | DA | DA1.5 | DA2 | ||||||
| Effective temperature | [K] | 27375.0 | 32610.0 (468) | 39713.0 (1475) | |||||||
| log(g) | [cgs] | 8.03 | 8.31 (0.05) | 8.42 (0.02) | |||||||
| Mass | [M☉] | 0.659 | 0.84 (0.03) | 0.909 (0.02) | |||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.0148 | |||||||||
| 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] | 19.84 (0.04) | 19.82 (0.06) | 19.84 | 19.84 (0.04) | 19.82 (0.06) | |||||
| Distance | [pc] | 50.41 (0.1) | 50.44 (0.2) | 48.00 | 50.41 | 50.41 (0.1) | 50.44 (0.2) | ||||
| Composition | H | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 79.22657127 (0.04) | 79.16858612 (0.1) | 79.227 (0.04) | 79.16858612 | ||||||
| Proper motion (declination) | [mas/yr] | -36.87341225 (0.04) | -36.78662509 (0.09) | -36.873 (0.04) | -36.78662509 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 14.50 | ||||||||||
| V magnitude | 14.00 | 14.00 | |||||||||
| R magnitude | 14.40 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 13.69 (0.002) | 13.70 | 13.69 | 13.69 (0.003) | 13.70 | ||||||
| BP magnitude | 13.54 (0.002) | 13.46 | 13.46 | ||||||||
| RP magnitude | 13.97 (0.002) | 13.96 | 13.96 | ||||||||
| Pan g magnitude | 13.55 (0.009) | ||||||||||
| Pan r magnitude | 13.95 (0.002) | ||||||||||
| Pan i magnitude | 14.31 (0.005) | ||||||||||
| Pan z magnitude | 14.61 (0.002) | ||||||||||
| Pan y magnitude | 14.80 (0.002) | ||||||||||
| E(B-V) | 0.002 | ||||||||||
* Constant surface field
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