All names: WD 1817-598, WDJ182159.54-595148.52, SCR 1821-5951, Gaia EDR3 6635520414133666944, 182159.54-595148.52, TIC 119091732, 2MASS J18215954-5951484, Gaia DR2 6635520414133666944, SCR J1821-5951, Gaia DR3 6635520414133666944
| Parameter | Unit | Gaia EDR3 | O'Brien et al. 2024 | O'Brien et al. 2022 | Gaia DR2 | Subasavage et al. 2017 | Stilism | Holberg et al. 2016 | Sion et al. 2014 | Subasavage et al. 2008 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 21 59.39 (0.04) | 18 21 59.40 (0.04) | 18 21 59.54 | 18 21 59.28 | 18 21 59.54 | 18 21 59.39 | 18 21 59.54 (0.04) | 18 21 59.40 | 18 21 59.52 | |||||
| Declination | -59 51 54.25 (0.04) | -59 51 54.07 (0.05) | -59 51 04.06 | -59 51 46.80 | -59 51 48.50 | -59 51 54.25 | -59 51 48.52 (0.04) | -59 51 54.07 | -59 51 45.72 | |||||
| Spectral type | DA | DA | DC | DA | DA5.8 | DC | DC: | DC | DC10.2 | |||||
| Effective temperature | [K] | 4748.0 (31) | 4750.0 (30) | 4950.0 (130) | 4960.0 (145) | 4960.0 | 4960.0 (145) | 4784.0 (20) | ||||||
| log(g) | [cgs] | 7.27 (0.03) | 7.27 (0.03) | 7.44 (0.08) | 8.00 (0) | 7.21 (0.01) | ||||||||
| Mass | [M☉] | 0.265 (0.007) | 0.3 (0.05) | 0.58 (0) | 0.223 (0.006) | |||||||||
| log(Luminosity) | [L☉] | -3.79 (0.06) | ||||||||||||
| Cooling age | [Gyr] | 2.1100 (0.3) | 5.8500 | |||||||||||
| 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] | 33.16 (0.06) | 33.16 (0.06) | 33.16 (0.06) | 33.12 (0.08) | 34.07 (0.6) | 33.16 | 33.16 (0.06) | 33.12 (0.08) | 47.80 | ||||
| Distance | [pc] | 30.15 (0.06) | 30.16 (0.05) | 30.16 (0.05) | 30.20 (0.07) | 29.35 (0.5) | 24.88 (2) | 24.87 | 20.90 | 30.15 | 30.15 (0.06) | 30.20 (0.07) | 20.92 | |
| Composition | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -66.50866012 (0.05) | -66.56230911 (0.08) | -66.509 (0.05) | -66.56230911 | |||||||||
| Proper motion (declination) | [mas/yr] | -357.9839378 (0.04) | -358.0800782 (0.07) | -357.984 (0.04) | -358.0800782 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 17.49 | |||||||||||||
| V magnitude | 16.85 | 14.77 | ||||||||||||
| R magnitude | 16.30 | 16.32 | ||||||||||||
| I magnitude | 15.80 | 15.73 | ||||||||||||
| J magnitude | 15.20 (0.05) | 15.20 (0.05) | 15.20 (0.05) | |||||||||||
| H magnitude | 15.01 (0.1) | 15.01 (0.1) | 15.01 (0.1) | |||||||||||
| K magnitude | 14.91 (0.1) | 14.91 (0.1) | 14.91 (0.1) | |||||||||||
| u magnitude | ||||||||||||||
| g magnitude | ||||||||||||||
| r magnitude | ||||||||||||||
| i magnitude | ||||||||||||||
| z magnitude | ||||||||||||||
| G magnitude | 16.56 (0.006) | 16.57 | 16.56 | 16.56 (0.003) | 16.57 | |||||||||
| BP magnitude | 17.08 (0.006) | 17.10 | 17.10 | |||||||||||
| RP magnitude | 15.88 (0.003) | 15.89 | 15.89 | |||||||||||
| Pan g magnitude | ||||||||||||||
| Pan r magnitude | ||||||||||||||
| Pan i magnitude | ||||||||||||||
| Pan z magnitude | ||||||||||||||
| Pan y magnitude | ||||||||||||||
| E(B-V) | 0.004 | |||||||||||||
* 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.