All names: SDSS J164424.24+382830.6, Gaia EDR3 1352516365793506048, TIC 57231065, SDSS J164424.24+382830.5, PG 1642+386, FBS B 143, SDSS J164424.24+382830.61, WD 1642+385, GALEX J164424.3+382831, FBS 1642+386, Gaia DR2 1352516365793506048, 2MASS J16442422+3828303, Gaia DR3 1352516365793506048
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 44 24.25 (0.04) | 16 44 24.24 | 16 44 24.24 | 16 44 24.25 (0.05) | 16 44 24.25 | 16 44 24.24 (0.04) | 16 44 24.53 | |||||||
| Declination | 38 28 30.67 (0.05) | 38 28 30.50 | 38 28 30.50 | 38 28 30.66 (0.06) | 38 28 30.67 | 38 28 30.53 (0.05) | 38 28 37.92 | |||||||
| Spectral type | DA | DA | DA | DA | DA1.1 | DA1 | DA | |||||||
| Effective temperature | [K] | 46402.0 (454) | 55263.0 (727) | 47420.0 (912) | 64617.0 (8141) | |||||||||
| log(g) | [cgs] | 7.55 (0.04) | 7.99 (0.05) | 7.72 (0.07) | 7.51 (2) | |||||||||
| Mass | [M☉] | 0.49 (0.01) | 0.6829999999999999 (0.02) | 0.56 (0.03) | 0.548 (91) | |||||||||
| log(Luminosity) | [L☉] | 0.20 (0.03) | ||||||||||||
| Cooling age | [Gyr] | 0.0013 (0.0003) | ||||||||||||
| 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] | 2.01 (0.05) | 2.04 (0.06) | 2.01 | 2.01 (0.05) | |||||||||
| Distance | [pc] | 498.44 (11) | 489.35 (15) | 368.00 | 498.44 | 498.43 (11) | ||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.515512216 (0.05) | 6.252007804 (0.1) | 6.516 (0.05) | ||||||||||
| Proper motion (declination) | [mas/yr] | 8.527736176 (0.06) | 8.398133987 (0.1) | 8.528 (0.06) | ||||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 16.03 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 16.78 (0.1) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 15.85 (0.005) | 15.85 (0.005) | 15.86 (0.02) | 15.85 (0.005) | 15.85 | |||||||||
| g magnitude | 16.20 (0.003) | 16.20 (0.003) | 16.21 (0.01) | 16.20 (0.003) | 16.20 | |||||||||
| r magnitude | 16.73 (0.004) | 16.73 (0.004) | 16.73 (0.02) | 16.73 (0.004) | 16.72 | |||||||||
| i magnitude | 17.09 (0.005) | 17.09 (0.005) | 17.10 (0.02) | 17.09 (0.005) | 17.09 | |||||||||
| z magnitude | 17.46 (0.02) | 17.46 (0.02) | 17.45 (0.02) | 17.46 (0.02) | 17.46 | |||||||||
| G magnitude | 16.48 (0.004) | 16.51 | 16.48 | 16.48 (0.003) | ||||||||||
| BP magnitude | 16.32 (0.004) | 16.26 | ||||||||||||
| RP magnitude | 16.79 (0.007) | 16.78 | ||||||||||||
| Pan g magnitude | 16.31 (0.006) | |||||||||||||
| Pan r magnitude | 16.75 (0.002) | |||||||||||||
| Pan i magnitude | 17.13 (0.003) | |||||||||||||
| Pan z magnitude | 17.41 (0.004) | |||||||||||||
| Pan y magnitude | 17.62 (0.01) | |||||||||||||
| E(B-V) | 0.021 | |||||||||||||
* 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.