All names: GALEX J172718.5+784208, WDJ172718.65+784206.95, Gaia DR2 1705586493119219712, WD 1730+787, WISE J172718.49+784208.1, Gaia EDR3 1705586493119219712, HS 1730+7844, 2MASS J17271860+7842067, SDSS J172718.57+784207.3, LP 23-246, UCAC4 844-013392, Gaia DR3 1705586493119219712, WISEA J172718.52+784208.2, SDSS J172718.58+784207.3, J1727+7842, NLTT 44995
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Kilic et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 27 18.38 (0.03) | 17 27 18.39 (0.05) | 17 27 18.38 | 17 27 18.65 (0.03) | 17 27 18.39 | 17 27 17.93 | |||||||
| Declination | 78 42 08.85 (0.03) | 78 42 08.79 (0.06) | 78 42 08.85 | 78 42 06.95 (0.03) | 78 42 08.79 | 78 42 07.92 | |||||||
| Spectral type | DA | DA | DA | DA | DA3.8 | ||||||||
| Effective temperature | [K] | 12210.0 (114) | 12215.0 (116) | 12225.0 | 13042.0 | 13172.0 (138) | |||||||
| log(g) | [cgs] | 7.95 (0.007) | 7.95 (0.008) | 7.95 | 7.98 | 8.02 (0.008) | |||||||
| Mass | [M☉] | 0.579 (0.006) | 0.575 (0.007) | 0.575 | 0.576 | 0.622 (0.007) | |||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.3308 | 0.2949 | ||||||||||
| 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] | 12.71 (0.03) | 12.65 (0.06) | 12.71 | 12.71 (0.03) | 12.65 (0.06) | |||||||
| Distance | [pc] | 78.71 (0.2) | 79.07 (0.4) | 78.71 | 78.71 (0.2) | 79.07 (0.4) | |||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -49.71605558 (0.03) | -49.715 (0.09) | -49.716 (0.03) | -49.71497358 | ||||||||
| Proper motion (declination) | [mas/yr] | 118.8596456 (0.04) | 118.886 (0.1) | 118.86 (0.04) | 118.8861687 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 16.05 (0.2) | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.28 (0.1) | ||||||||||||
| H magnitude | 16.03 (0.2) | ||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 16.40 (0.006) | 16.40 (0.006) | |||||||||||
| g magnitude | 15.93 (0.003) | 15.93 (0.003) | |||||||||||
| r magnitude | 16.15 (0.003) | 16.15 (0.003) | |||||||||||
| i magnitude | 16.36 (0.004) | 16.36 (0.004) | |||||||||||
| z magnitude | 16.67 (0.01) | 16.67 (0.01) | |||||||||||
| G magnitude | 16.06 (0.004) | 16.08 | 16.06 | 16.06 (0.003) | 16.08 | ||||||||
| BP magnitude | 16.06 (0.004) | 16.06 | 16.06 | ||||||||||
| RP magnitude | 16.12 (0.005) | 16.13 | 16.13 | ||||||||||
| Pan g magnitude | 15.99 (0.003) | ||||||||||||
| Pan r magnitude | 16.19 (0.004) | ||||||||||||
| Pan i magnitude | 16.42 (0.003) | ||||||||||||
| Pan z magnitude | 16.64 (0.006) | ||||||||||||
| Pan y magnitude | 16.77 (0.007) | ||||||||||||
| E(B-V) | 0.007 | ||||||||||||
* 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.