All names: GD 390, USNO-B1.0 1389-00353028, WD 2025+488, WDJ202725.03+485818.21, LSPM J2027+4858, 2MASS J20272504+4858185, Gaia DR2 2084005719302831744, TIC 277235925, EGGR 396, Gaia EDR3 2084005719302831744, Gaia DR3 2084005719302831744, WD 2025+48
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 27 25.23 (0.03) | 20 27 25.22 (0.03) | 20 27 25.23 | 20 27 25.03 (0.03) | 20 27 25.22 | 20 27 24.38 | ||||
| Declination | 48 58 20.31 (0.03) | 48 58 20.24 (0.04) | 48 58 20.31 | 48 58 18.21 (0.03) | 48 58 20.24 | 48 58 04.44 | ||||
| Spectral type | DA | DA | DA4.6 | DA5 | ||||||
| Effective temperature | [K] | 10900.0 (161) | 10544.0 (65) | |||||||
| log(g) | [cgs] | 8.13 (0.05) | 8.00 (0.009) | |||||||
| Mass | [M☉] | 0.68 (0.03) | 0.603 (0.007) | |||||||
| 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] | 17.11 (0.03) | 17.12 (0.04) | 17.11 | 17.11 (0.03) | 17.12 (0.04) | ||||
| Distance | [pc] | 58.43 (0.1) | 58.42 (0.1) | 56.00 | 58.43 | 58.43 (0.1) | 58.42 (0.1) | |||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 119.7364994 (0.03) | 119.6910696 (0.06) | 119.736 (0.03) | 119.6910696 | |||||
| Proper motion (declination) | [mas/yr] | 131.1411484 (0.03) | 131.2130163 (0.06) | 131.141 (0.03) | 131.2130163 | |||||
| Variability | NOV | |||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 16.50 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 15.90 | |||||||||
| I magnitude | ||||||||||
| J magnitude | 15.93 (0.09) | |||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | ||||||||||
| g magnitude | ||||||||||
| r magnitude | ||||||||||
| i magnitude | ||||||||||
| z magnitude | ||||||||||
| G magnitude | 15.83 (0.002) | 15.85 | 15.83 | 15.83 (0.003) | 15.85 | |||||
| BP magnitude | 15.87 (0.002) | 15.87 | 15.87 | |||||||
| RP magnitude | 15.78 (0.002) | 15.79 | 15.79 | |||||||
| Pan g magnitude | 15.83 (0.009) | |||||||||
| Pan r magnitude | 15.94 (0.003) | |||||||||
| Pan i magnitude | 16.11 (0.004) | |||||||||
| Pan z magnitude | 16.28 (0.004) | |||||||||
| Pan y magnitude | 16.41 (0.01) | |||||||||
| 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.