All names: HE 1247-1738, WD 1247-176, TIC 219769847, Gaia DR2 3522398478696160512, WD1247-176, EC 12477-1738, GALEX J125022.0-175446, 2MASS J12502208-1754465, USNO-B1.0 0720-00332134, Gaia DR3 3522398478696160512, Gaia EDR3 3522398478696160512
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2001 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 50 22.00 (0.04) | 12 50 22.00 (0.06) | 12 50 22.10 | 12 50 22.07 (0.04) | 12 50 21.31 | ||||
| Declination | -17 54 46.74 (0.03) | -17 54 46.73 (0.05) | -17 54 48.00 | -17 54 46.56 (0.03) | -17 54 43.56 | ||||
| Spectral type | DA | DA+dM | DA3+dM | DA+dMe | |||||
| Effective temperature | [K] | 21620.0 (497) | 20922.0 (317) | ||||||
| log(g) | [cgs] | 8.16 (0.07) | 8.06 (0.05) | ||||||
| Mass | [M☉] | 0.72 (0.04) | |||||||
| 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] | 7.46 (0.05) | 7.44 (0.07) | 7.46 (0.05) | |||||
| Distance | [pc] | 134.05 (0.9) | 134.34 (1) | 116.00 | 134.05 (0.9) | ||||
| Composition | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | -67.17501247 (0.06) | -67.04288025 (0.1) | -67.175 (0.06) | |||||
| Proper motion (declination) | [mas/yr] | -11.10277955 (0.04) | -11.00308561 (0.09) | -11.103 (0.04) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | WDMS | yes | |||||||
| B magnitude | 16.32 | ||||||||
| V magnitude | 16.19 | 16.19 | |||||||
| R magnitude | 15.70 | ||||||||
| I magnitude | |||||||||
| J magnitude | 13.50 (0.02) | ||||||||
| H magnitude | 12.86 (0.02) | ||||||||
| K magnitude | 12.60 (0.03) | ||||||||
| u magnitude | |||||||||
| g magnitude | |||||||||
| r magnitude | |||||||||
| i magnitude | |||||||||
| z magnitude | |||||||||
| G magnitude | 15.78 (0.003) | 15.78 | 15.78 (0.003) | ||||||
| BP magnitude | 16.18 (0.003) | 16.17 | |||||||
| RP magnitude | 15.05 (0.002) | 15.06 | |||||||
| Pan g magnitude | 16.17 (0.004) | ||||||||
| Pan r magnitude | 16.18 (0.002) | ||||||||
| Pan i magnitude | 15.54 (0.002) | ||||||||
| Pan z magnitude | 15.00 (0.002) | ||||||||
| Pan y magnitude | 14.70 (0.006) | ||||||||
| E(B-V) | 0.016 | ||||||||
* 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.