All names: Gaia EDR3 85008707141970304, Gaia DR2 85008707141970304, SDSS J024916.12+193940.9, Gaia DR3 85008707141970304, WDJ024916.1+193941.07, J0249+1939, WDJ024916.10+193941.08, SDSS J024916.12+193940.8, GALEX J024915.9+193941
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 49 16.15 (0.2) | 02 49 16.15 | 02 49 16.15 | 02 49 16.10 (0.2) | 02 49 16.15 | ||||||
| Declination | 19 39 40.38 (0.2) | 19 39 40.40 | 19 39 40.38 | 19 39 41.08 (0.2) | 19 39 40.40 | ||||||
| Spectral type | DC | DC | DC | DA | DC | ||||||
| Effective temperature | [K] | 6388.0 (55) | 6034.0 (56) | 6055.0 (52) | 6578.0 (199) | ||||||
| log(g) | [cgs] | 8.25 (0.03) | 8.12 (0.04) | 8.13 (0.04) | 8.36 (0.06) | ||||||
| Mass | [M☉] | 0.734 (0.03) | 0.649 (0.04) | 0.656 (0.04) | 0.818 (0.05) | ||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 3.4300 | |||||||||
| log(H/He) | -3.0 | -3 | |||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 11.29 (0.3) | 11.69 (0.4) | 11.69 (0.4) | 11.29 | 11.29 (0.3) | 11.69 (0.4) | ||||
| Distance | [pc] | 88.56 (2) | 85.54 (3) | 85.53 (3) | 88.56 | 88.56 (2) | 85.53 (3) | ||||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 40.56907645 (0.3) | 40.50589586 (0.5) | 40.569 (0.3) | 40.50589586 | ||||||
| Proper motion (declination) | [mas/yr] | -44.17360361 (0.2) | -43.94085561 (0.5) | -44.174 (0.2) | -43.94085561 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 18.12 (0.06) | ||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 19.87 (0.03) | 19.90 (0.04) | 19.90 (0.04) | ||||||||
| g magnitude | 19.19 (0.01) | 19.19 (0.01) | |||||||||
| r magnitude | 18.92 (0.01) | 18.92 (0.01) | |||||||||
| i magnitude | 18.84 (0.01) | 18.84 (0.01) | |||||||||
| z magnitude | 18.83 (0.03) | 18.83 (0.03) | |||||||||
| G magnitude | 18.91 (0.04) | 18.94 | 18.91 | 18.91 (0.004) | 18.94 | ||||||
| BP magnitude | 19.15 (0.04) | 19.29 | 19.29 | ||||||||
| RP magnitude | 18.58 (0.03) | 18.52 | 18.52 | ||||||||
| Pan g magnitude | 19.13 (0.008) | 19.13 (0.009) | |||||||||
| Pan r magnitude | 18.91 (0.007) | 18.91 (0.009) | |||||||||
| Pan i magnitude | 18.85 (0.004) | 18.85 (0.004) | |||||||||
| Pan z magnitude | 18.88 (0.02) | 18.88 (0.02) | |||||||||
| Pan y magnitude | 18.85 (0.05) | 18.85 (0.06) | |||||||||
| E(B-V) | 0.006 | ||||||||||
* 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.