All names: USNO 188, UCAC2 40760534, ASCC 721622, GEN# +9.80186031, uvby98 980186031, WEB 18346, LSPM J2034+2503, USNO-B1.0 1150-00493091, Ci 20 1215, TYC 2161-1038-1, HIC 101516, LTT 16005, PM J20343+2503, HD 340611, WISEA J203421.56+250343.8, TIC 298186852, CSI+24-20322, G 186-31, WD 2032+248, HIP 101516, Gaia DR3 1831553382794173824, PM 20322+2454, UBV 17851, PLX 4895.00, Gaia EDR3 1831553382794173824, 20343+2503, CNS5 5079, PLX 4895, UBV M 42988, 2MASS J20342188+2503498, JP11 5176, WDJ203421.89+250349.75, AC +25 68981, LHS 3562, GJ 794, WD 2032+24, EGGR 139, GCRV 12872, LAWD 82, GEN# +1.00340611, GEN# +6.10010794, NLTT 49494, Wolf 1346, Gaia DR2 1831553382794173824, G186-31, LFT 1554
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | McCleery et al. 2020 | Gaia DR2 | Bedard et al. 2017 | Tremblay et al. 2017 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Sion et al. 2014 | Giammichele et al. 2012 | Gianninas et al. 2011 | Holberg et al. 2008 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 34 21.41 (0.03) | 20 34 21.42 (0.04) | 20 34 21.42 (0.04) | 20 34 21.84 | 20 34 21.41 | 20 34 21.88 (0.03) | 20 34 21.42 | 20 34 22.37 | |||||||||||
| Declination | 25 03 40.74 (0.03) | 25 03 41.02 (0.05) | 25 03 41.02 (0.05) | 25 03 46.80 | 25 03 40.74 | 25 03 49.75 (0.03) | 25 03 41.02 | 25 04 09.48 | |||||||||||
| Spectral type | DAZ | DA | DA | DA | DA | DA | DA2.4 | DA | DA | DA | DA | DA2.4 | DA3 | ||||||
| Effective temperature | [K] | 20145.0 (402) | 20295.1 (180) | 20851.0 (303) | 20700.0 (320) | 20704.0 (332) | 20500.0 (307) | 19983.0 | 20704.0 (322) | 20700.0 (322) | 21608.0 (153) | ||||||||
| log(g) | [cgs] | 7.93 (0.02) | 7.95 (0.01) | 7.97 (0.04) | 8.02 (0.05) | 8.02 (0.05) | 8.03 (0.05) | 8.03 (0.05) | 8.02 (0.05) | 8.02 (0.006) | |||||||||
| Mass | [M☉] | 0.587 (0.01) | 0.66 (0.09) | 0.64 (0.03) | 0.64 (0.03) | 0.64 (0.03) | 0.64 (0.03) | 0.636 (0.005) | |||||||||||
| log(Luminosity) | [L☉] | -1.58 | -1.56 | ||||||||||||||||
| Cooling age | [Gyr] | 0.0700 | 0.0600 | ||||||||||||||||
| 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] | 67.41 (0.04) | 67.41 (0.04) | 67.49 (0.06) | 67.49 (0.06) | 64.32 (3) | 66.98 (2) | 69.90 (3) | 67.65 (2) | 68.22 (1) | 67.41 | 67.41 (0.04) | 67.49 (0.06) | 69.00 (4) | |||||
| Distance | [pc] | 14.83 (0.008) | 14.83 (0.009) | 14.82 (0.01) | 14.82 (0.01) | 15.50 (0.6) | 15.55 (0.6) | 14.93 (0.4) | 14.30 (0.5) | 14.65 | 14.80 (0.6) | 14.00 | 15.65 | 14.83 | 14.83 (0.008) | 14.82 (0.01) | 14.49 (0.8) | ||
| Composition | H | H | H | H | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -403.3866541 (0.03) | -403.6334071 (0.08) | -403.387 (0.03) | -403.6334071 | ||||||||||||||
| Proper motion (declination) | [mas/yr] | -563.4038766 (0.04) | -563.3274074 (0.09) | -563.404 (0.04) | -563.3274074 | ||||||||||||||
| Variability | |||||||||||||||||||
| Magnetic | |||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||
| Binarity | |||||||||||||||||||
| B magnitude | 11.47 | ||||||||||||||||||
| V magnitude | 11.55 (0.01) | 11.53 | 11.52 | 11.55 | |||||||||||||||
| R magnitude | 11.65 | ||||||||||||||||||
| I magnitude | 11.73 | ||||||||||||||||||
| J magnitude | 12.04 (0.03) | ||||||||||||||||||
| H magnitude | 12.07 (0.03) | ||||||||||||||||||
| K magnitude | 12.19 (0.03) | ||||||||||||||||||
| u magnitude | |||||||||||||||||||
| g magnitude | |||||||||||||||||||
| r magnitude | |||||||||||||||||||
| i magnitude | |||||||||||||||||||
| z magnitude | |||||||||||||||||||
| G magnitude | 11.54 (0.0007) | 11.55 | 11.55 | 11.54 | 11.54 (0.003) | 11.55 | |||||||||||||
| BP magnitude | 11.45 (0.0007) | 11.42 | 11.42 | ||||||||||||||||
| RP magnitude | 11.72 (0.0004) | 11.72 | 11.72 | ||||||||||||||||
| Pan g magnitude | 11.57 (0.08) | ||||||||||||||||||
| Pan r magnitude | 11.61 (0) | ||||||||||||||||||
| Pan i magnitude | 12.00 (0.001) | ||||||||||||||||||
| Pan z magnitude | 12.31 (0.007) | ||||||||||||||||||
| Pan y magnitude | 12.49 (0.005) | ||||||||||||||||||
| E(B-V) | 0.000 | ||||||||||||||||||
* 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.