All names: J1633+3930, Gaia EDR3 1331894033078063488, 2MASS J16333930+3930534, 1SWASP J163339.30+393053.6, GALEX J163339.2+393052, Gaia DR2 1331894033078063488, FBS B 139, LAMOST J163339.30+393053.4, TIC 406811054, SDSS J163339.31+393053.3, SDSS J163339.30+393053.4, WDJ163339.31+393053.43, Gaia DR3 1331894033078063488, KUV 16319+3937, FBS 1631+396, WD 1631+396
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Kilic et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Guo et al. 2015 | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 33 39.32 (0.02) | 16 33 39.32 (0.03) | 16 33 39.32 | 16 33 39.31 (0.02) | 16 33 39.32 | 16 33 39.53 | |||||||||
| Declination | 39 30 52.42 (0.02) | 39 30 52.46 (0.04) | 39 30 52.42 | 39 30 53.43 (0.02) | 39 30 52.46 | 39 30 54.00 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA2.8 | DA | ||||||||
| Effective temperature | [K] | 18030.0 (178) | 18032.0 (180) | 17631.0 | 20073.0 | 18230.0 (290) | 18027.0 (165) | ||||||||
| log(g) | [cgs] | 7.78 (0.008) | 7.77 (0.008) | 7.74 | 7.99 | 7.73 (0.05) | 7.77 (0.008) | ||||||||
| Mass | [M☉] | 0.502 (0.006) | 0.498 (0.006) | 0.485 | 0.592 | 0.48 (0.02) | 0.498 (0.005) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.0700 | 0.0659 | ||||||||||||
| 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] | 16.99 (0.02) | 16.94 (0.04) | 16.99 | 16.99 (0.02) | 16.94 (0.04) | |||||||||
| Distance | [pc] | 58.84 (0.08) | 59.02 (0.1) | 51.00 | 58.84 | 58.84 (0.08) | 59.02 (0.1) | ||||||||
| Composition | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.352195418 (0.03) | 6.32666959 (0.07) | 6.352 (0.03) | 6.32666959 | ||||||||||
| Proper motion (declination) | [mas/yr] | -62.97226648 (0.04) | -63.05834546 (0.09) | -62.972 (0.04) | -63.05834546 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 14.20 | ||||||||||||||
| V magnitude | 13.88 | ||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 14.85 (0.04) | ||||||||||||||
| H magnitude | 14.87 (0.07) | ||||||||||||||
| K magnitude | 14.89 (0.1) | ||||||||||||||
| u magnitude | 14.46 (0.003) | 14.51 (0.004) | |||||||||||||
| g magnitude | 14.29 (0.003) | 14.30 (0.004) | |||||||||||||
| r magnitude | 14.66 (0.004) | 14.66 (0.004) | |||||||||||||
| i magnitude | 14.94 (0.004) | 14.94 (0.004) | |||||||||||||
| z magnitude | 15.25 (0.005) | 15.24 (0.006) | |||||||||||||
| G magnitude | 14.49 (0.0009) | 14.51 | 14.49 | 14.49 (0.003) | 14.51 | ||||||||||
| BP magnitude | 14.43 (0.0009) | 14.42 | 14.42 | ||||||||||||
| RP magnitude | 14.65 (0.0009) | 14.65 | 14.65 | ||||||||||||
| Pan g magnitude | 14.34 (0.002) | ||||||||||||||
| Pan r magnitude | 14.68 (0.004) | ||||||||||||||
| Pan i magnitude | 14.98 (0.002) | ||||||||||||||
| Pan z magnitude | 15.22 (0.002) | ||||||||||||||
| Pan y magnitude | 15.40 (0.005) | ||||||||||||||
| E(B-V) | 0.008 | ||||||||||||||
* 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.