All names: Gaia DR2 2186814729415840384, EGGR 444, Gaia EDR3 2186814729417401984, UCAC3 292-147910, GD 546, WD 2025+554, UCAC4 728-068231, TIC 467224218, Gaia DR3 2186814729417401984, 2MASS J20270549+5534086, USNO-B1.0 1455-00318100
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 27 05.66 (0.03) | 20 27 05.65 (0.04) | 20 27 05.66 | 20 27 05.50 (0.03) | 20 27 04.80 | |||
| Declination | 55 34 09.80 (0.03) | 55 34 09.77 (0.05) | 55 34 09.80 | 55 34 08.81 (0.03) | 55 33 57.60 | |||
| Spectral type | DA | DA | DA1.6 | DA2 | ||||
| Effective temperature | [K] | 31390.0 (460) | 30203.0 (532) | |||||
| log(g) | [cgs] | 7.83 (0.05) | 7.88 (0.02) | |||||
| Mass | [M☉] | 0.57 (0.02) | 0.582 (0.01) | |||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| 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] | 6.47 (0.04) | 6.44 (0.05) | 6.47 | 6.47 (0.04) | |||
| Distance | [pc] | 154.54 (0.9) | 155.31 (1) | 161.00 | 154.54 | 154.54 (0.9) | ||
| Composition | H | |||||||
| Proper motion (right ascension) | [mas/yr] | 82.81133981 (0.04) | 82.74793436 (0.09) | 82.811 (0.04) | ||||
| Proper motion (declination) | [mas/yr] | 61.92329856 (0.05) | 61.944264 (0.09) | 61.923 (0.05) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 16.30 | |||||||
| V magnitude | ||||||||
| R magnitude | 16.06 (0.2) | |||||||
| I magnitude | ||||||||
| J magnitude | 16.26 (0.1) | |||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | ||||||||
| g magnitude | ||||||||
| r magnitude | ||||||||
| i magnitude | ||||||||
| z magnitude | ||||||||
| G magnitude | 15.70 (0.002) | 15.71 | 15.70 | 15.70 (0.003) | ||||
| BP magnitude | 15.56 (0.002) | 15.49 | ||||||
| RP magnitude | 15.98 (0.004) | 15.97 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| E(B-V) | 0.010 | |||||||
* 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.