All names: UCAC4 694-110609, 22188+4839, TIC 431067687, Gaia DR2 1999615350008375552, USNO-B1.0 1386-00451291, PM J22188+4839, WD 2216+484, WDJ221851.14+483929.00, Gaia DR3 1999615350008375552, EGGR 452, J2218+4839, 2MASS J22185114+4839289, 2216+484, Gaia EDR3 1999615350008375552, GD 402, PSO J334.7139+48.6578
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Leggett et al. 2018 | Gaia DR2 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Bergeron et al. 1997 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 18 51.38 (0.02) | 22 18 51.37 (0.03) | 22 18 51.37 (0.03) | 22 18 51.38 | 22 18 51.14 (0.02) | 22 18 51.37 | 22 18 49.18 | ||||||||||
| Declination | 48 39 28.29 (0.02) | 48 39 28.32 (0.03) | 48 39 28.32 (0.03) | 48 39 28.29 | 48 39 29.00 (0.02) | 48 39 28.32 | 48 39 21.96 | ||||||||||
| Spectral type | DA | DA+DC | DA | DA | DA | DA | DC | DA8.3 | DA7 | ||||||||
| Effective temperature | [K] | 7206.0 (54) | 7269.0 (22) | 7120.2 (30) | 7155.0 (55) | 5650.0 (85) | 6080.0 (186) | 7140.0 (460) | 6728.0 (30) | ||||||||
| log(g) | [cgs] | 7.76 (0.01) | 7.80 (0.006) | 7.74 (0.01) | 7.77 (0.02) | 8.00 (0) | 8.74 (0.3) | 8.00 (0) | 7.50 (0.009) | ||||||||
| Mass | [M☉] | 0.467 (0.003) | 0.479 (0.005) | 0.463 (0.01) | 0.59 (0.1) | 1.06 (0.2) | 0.59 | 0.326 (0.005) | |||||||||
| log(Luminosity) | [L☉] | -3.83 | -3.42 | ||||||||||||||
| Cooling age | [Gyr] | 1.0900 | 1.0470 (0.03) | 1.5200 | |||||||||||||
| 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] | 25.26 (0.03) | 25.26 (0.03) | 25.20 (0.04) | 25.20 (0.04) | 25.20 (0.04) | 26.89 (0.5) | 25.20 (0.04) | 25.26 | 25.26 (0.03) | 25.20 (0.04) | ||||||
| Distance | [pc] | 39.58 (0.05) | 39.59 (0.05) | 39.68 (0.06) | 39.68 (0.07) | 39.68 (0.07) | 37.19 (0.7) | 39.68 (0.07) | 26.20 (1) | 14.00 | 39.58 | 39.58 (0.05) | 39.68 (0.07) | ||||
| Composition | H | H | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 145.9716539 (0.03) | 146.0511663 (0.07) | 145.972 (0.03) | 146.0511663 | ||||||||||||
| Proper motion (declination) | [mas/yr] | -44.23407698 (0.03) | -44.17235403 (0.06) | -44.234 (0.03) | -44.17235403 | ||||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 16.46 | 16.70 | |||||||||||||||
| V magnitude | 16.13 | ||||||||||||||||
| R magnitude | 15.86 | 15.96 (0.4) | |||||||||||||||
| I magnitude | 15.66 | ||||||||||||||||
| J magnitude | 15.41 (0.007) | 15.48 (0.06) | 15.48 (0.06) | ||||||||||||||
| H magnitude | 15.30 (0.1) | 15.30 (0.1) | 15.30 (0.1) | ||||||||||||||
| K magnitude | 15.32 (0.2) | 15.32 (0.2) | 15.32 (0.2) | ||||||||||||||
| u magnitude | |||||||||||||||||
| g magnitude | 16.19 (0.002) | ||||||||||||||||
| r magnitude | 16.04 (0.003) | ||||||||||||||||
| i magnitude | 16.03 (0.002) | ||||||||||||||||
| z magnitude | 16.08 (0.006) | ||||||||||||||||
| G magnitude | 15.99 (0.002) | 16.00 | 16.00 | 15.99 | 15.99 (0.003) | 16.00 | |||||||||||
| BP magnitude | 16.17 (0.002) | 16.17 | 16.17 | ||||||||||||||
| RP magnitude | 15.68 (0.002) | 15.68 | 15.68 | ||||||||||||||
| Pan g magnitude | 16.19 (0.002) | 16.19 (0.002) | 16.19 (0.002) | ||||||||||||||
| Pan r magnitude | 16.04 (0.004) | 16.04 (0.003) | 16.04 (0.003) | ||||||||||||||
| Pan i magnitude | 16.03 (0.002) | 16.03 (0.002) | 16.03 (0.002) | ||||||||||||||
| Pan z magnitude | 16.08 (0.004) | 16.08 (0.006) | 16.08 (0.006) | ||||||||||||||
| Pan y magnitude | 16.11 (0.005) | 16.11 (0.006) | 16.11 (0.006) | ||||||||||||||
| E(B-V) | 0.003 | ||||||||||||||||
* 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.