All names: Gaia DR2 930093722208184448, TIC 802015620, LAMOST J082145.27+455923.4, SDSS J082145.27+455923.3, WD 0818+461, SDSS J082145.27+455923.4, ATO J125.4387+45.9898, Gaia DR3 930093722208184448, Gaia EDR3 930093722208184448, WIRED J082145.27+455923.4, LAMOST J082145.27+455923.3
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 21 45.29 (0.07) | 08 21 45.28 | 08 21 45.29 (0.09) | 08 21 45.27 | 08 21 45.28 (0.07) | 08 21 45.27 | 08 21 44.54 | 08 21 45.27 | ||||
| Declination | 45 59 23.34 (0.05) | 45 59 23.38 | 45 59 23.34 (0.08) | 45 59 23.39 | 45 59 23.39 (0.05) | 45 59 23.41 | 45 59 19.32 | 45 59 23.41 | ||||
| Spectral type | DA+M | DA | DA | DA+M: | DA+M | DA+M | CV | |||||
| Effective temperature | [K] | 80938.0 (4024) | 80420.0 (3420) | 87047.0 (2706) | 85569.0 (2906) | |||||||
| log(g) | [cgs] | 7.77 (0.1) | 7.63 (0.1) | 7.57 (0.1) | 7.50 (0.1) | |||||||
| Mass | [M☉] | 0.66 (0.05) | 0.62 (0.04) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.0005 | ||||||||||
| 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] | 1.18 (0.1) | 1.19 (0.1) | 1.18 (0.1) | ||||||||
| Distance | [pc] | 846.06 (69) | 843.43 (91) | 846.10 (69) | ||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.063327552 (0.09) | 6.156595861 (0.2) | 6.063 (0.09) | -3.6 | |||||||
| Proper motion (declination) | [mas/yr] | -3.227178825 (0.08) | -3.284516486 (0.2) | -3.227 (0.08) | -3.3 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | yes | WDMS | ||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 16.85 (0.007) | 16.83 | 16.85 (0.007) | 16.83 (0.05) | 16.77 | 16.81 (0.05) | ||||||
| g magnitude | 17.21 (0.004) | 17.26 | 17.21 (0.004) | 17.26 (0.02) | 17.26 | 17.26 (0.02) | ||||||
| r magnitude | 17.49 (0.005) | 17.56 | 17.49 (0.005) | 17.57 (0.01) | 17.57 | 17.56 (0.02) | ||||||
| i magnitude | 17.62 (0.007) | 17.62 | 17.61 (0.007) | 17.62 (0.02) | 17.63 | 17.62 (0.02) | ||||||
| z magnitude | 17.69 (0.02) | 17.65 | 17.69 (0.02) | 17.65 (0.02) | 17.63 | 17.65 (0.02) | ||||||
| G magnitude | 17.43 (0.01) | 17.46 | 17.43 (0.005) | |||||||||
| BP magnitude | 17.38 (0.01) | 17.31 | ||||||||||
| RP magnitude | 17.44 (0.02) | 17.43 | ||||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.032 | |||||||||||
* 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.