All names: Gaia DR3 690742208485115520, WD 0846+249, LAMOST J084905.87+244508.0, SDSS J084905.87+244507.8, GALEX J084905.8+244508, Gaia DR2 690742208485115520, Gaia EDR3 690742208485115520, TON 353, SDSS J084905.88+244507.8, LAMOST J084905.88+244508.0, SDSS J084905.87+244507.9, Ton 353, PG 0846+249
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Guo et al. 2015 | Gianninas et al. 2011 | Liebert et al. 2005 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 49 05.87 (0.08) | 08 49 05.87 | 08 49 05.87 (0.1) | 08 49 05.87 | 08 49 05.88 (0.08) | 08 49 05.76 | |||||||
| Declination | 24 45 07.81 (0.04) | 24 45 07.94 | 24 45 07.82 (0.06) | 24 45 07.81 | 24 45 07.92 (0.04) | 24 45 08.64 | |||||||
| Spectral type | DA | DA | DA | DAO.7 | DA1 | DA | |||||||
| Effective temperature | [K] | 70180.0 (2874) | 66110.0 (2534) | 323608.0 (29030) | |||||||||
| log(g) | [cgs] | 7.48 (0.1) | 7.11 (0.2) | 8.40 (0.06) | |||||||||
| Mass | [M☉] | 0.55 (0.03) | 0.4 (0.05) | 1.916 (0.04) | |||||||||
| log(Luminosity) | [L☉] | 1.17 | |||||||||||
| Cooling age | [Gyr] | 0.0141 | |||||||||||
| 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] | 1.51 (0.09) | 1.78 (0.1) | 1.51 | 1.51 (0.09) | ||||||||
| Distance | [pc] | 660.18 (39) | 561.71 (38) | 643.00 | 865.00 | 660.18 | 660.20 (39) | ||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -2.136040589 (0.08) | -2.099213818 (0.2) | -2.136 (0.09) | |||||||||
| Proper motion (declination) | [mas/yr] | -6.829101671 (0.07) | -7.195002162 (0.1) | -6.829 (0.07) | |||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 16.40 | ||||||||||||
| V magnitude | 16.71 | 16.71 | |||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 17.52 (0.09) | ||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 15.91 (0.005) | 15.91 (0.005) | |||||||||||
| g magnitude | 16.34 (0.004) | 16.34 (0.004) | |||||||||||
| r magnitude | 16.86 (0.004) | 16.86 (0.004) | |||||||||||
| i magnitude | 17.25 (0.006) | 17.25 (0.006) | |||||||||||
| z magnitude | 17.60 (0.02) | 17.60 (0.02) | |||||||||||
| G magnitude | 16.65 (0.003) | 16.66 | 16.65 | 16.65 (0.003) | |||||||||
| BP magnitude | 16.45 (0.003) | 16.36 | |||||||||||
| RP magnitude | 16.94 (0.007) | 16.94 | |||||||||||
| Pan g magnitude | 16.44 (0.004) | ||||||||||||
| Pan r magnitude | 16.90 (0.005) | ||||||||||||
| Pan i magnitude | 17.27 (0.005) | ||||||||||||
| Pan z magnitude | 17.56 (0.004) | ||||||||||||
| Pan y magnitude | 17.78 (0.005) | ||||||||||||
| E(B-V) | 0.027 | ||||||||||||
* 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.