All names: 18572+2026, WDJ185713.94+202628.60, PSO J284.3080+20.4402, SDSS J185713.93+202626.5, WD 1855+203, PM J18572+2026, TIC 350484805, USNO-B1.0 1104-00372382, 2MASS J18571395+2026292, LSPM J1857+2026, J1857+2026, Gaia DR2 4518917168694695168, SDSS J185713.93+202626.6, Gaia DR3 4518917168694695168, Gaia EDR3 4518917168694695168
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | Kilic et al. 2020 | McCleery et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 57 13.92 (0.03) | 18 57 13.92 (0.04) | 18 57 13.92 (0.04) | 18 57 13.92 | 18 57 13.94 (0.03) | 18 57 13.92 | 18 57 13.68 | |||||||||
| Declination | 20 26 23.59 (0.04) | 20 26 23.74 (0.06) | 20 26 23.74 (0.06) | 20 26 23.59 | 20 26 28.60 (0.04) | 20 26 23.74 | 20 26 27.24 | |||||||||
| Spectral type | DA | DA | DA+DC: | DA+DC? | DA | DA | DA | DA: | DA | DA | ||||||
| Effective temperature | [K] | 6649.0 (22) | 6616.0 (44) | 6598.0 (29) | 6650.0 (22) | 6552.4 (25) | 6555.0 (45) | 5350.0 (1009) | 6621.0 (27) | |||||||
| log(g) | [cgs] | 8.29 (0.006) | 8.27 (0.02) | 8.29 (0.007) | 8.30 (0.007) | 8.26 (0.01) | 8.27 (0.02) | 8.00 (0) | 8.27 (0.007) | |||||||
| Mass | [M☉] | 0.776 (0.006) | 0.764 (0.01) | 0.776 (0.007) | 0.779 (0.006) | 0.764 (0.01) | 0.58 (0.1) | 0.764 (0.007) | ||||||||
| log(Luminosity) | [L☉] | -3.93 | ||||||||||||||
| Cooling age | [Gyr] | 3.4700 | 3.2420 (0.1) | |||||||||||||
| 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] | 30.66 (0.05) | 30.66 (0.05) | 30.77 (0.07) | 30.77 (0.07) | 30.77 (0.07) | 30.77 (0.07) | 30.66 | 30.66 (0.05) | 30.77 (0.07) | ||||||
| Distance | [pc] | 32.61 (0.06) | 32.62 (0.05) | 32.50 (0.07) | 32.49 (0.08) | 32.49 (0.07) | 32.49 (0.08) | 31.70 (8) | 32.61 | 32.61 (0.06) | 32.49 (0.08) | |||||
| Composition | H | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -16.41352253 (0.04) | -16.47400926 (0.1) | -16.414 (0.04) | -16.47400926 | |||||||||||
| Proper motion (declination) | [mas/yr] | -313.3143389 (0.05) | -313.3422849 (0.1) | -313.314 (0.05) | -313.3422849 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 16.30 | |||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | 16.50 | |||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 15.89 (0.01) | 15.87 (0.08) | 15.87 | 15.87 (0.08) | ||||||||||||
| H magnitude | 15.61 (0.1) | 15.61 (0.1) | 15.61 | 15.61 (0.1) | ||||||||||||
| K magnitude | 16.11 (0.03) | 16.11 | ||||||||||||||
| u magnitude | 17.52 (0.01) | 17.51 (0.01) | 17.51 (0.01) | |||||||||||||
| g magnitude | 16.85 (0.003) | 16.85 (0.004) | ||||||||||||||
| r magnitude | 16.63 (0.004) | 16.62 (0.004) | ||||||||||||||
| i magnitude | 16.55 (0.006) | 16.49 (0.005) | ||||||||||||||
| z magnitude | 16.59 (0.004) | 16.56 (0.009) | ||||||||||||||
| G magnitude | 16.60 (0.003) | 16.61 | 16.61 | 16.60 | 16.60 (0.003) | 16.61 | ||||||||||
| BP magnitude | 16.82 (0.003) | 16.84 | 16.84 | |||||||||||||
| RP magnitude | 16.22 (0.002) | 16.23 | 16.23 | |||||||||||||
| Pan g magnitude | 16.93 (0.03) | 16.93 (0.03) | 16.85 (0.002) | |||||||||||||
| Pan r magnitude | 16.63 (0.006) | 16.63 (0.006) | 16.63 (0.004) | |||||||||||||
| Pan i magnitude | 16.58 (0.01) | 16.58 (0.01) | 16.55 (0.006) | |||||||||||||
| Pan z magnitude | 16.58 (0.007) | 16.58 (0.007) | 16.59 (0.004) | |||||||||||||
| Pan y magnitude | 16.62 (0.008) | 16.62 (0.008) | 16.62 (0.02) | |||||||||||||
| E(B-V) | 0.002 | |||||||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.