All names: Gaia DR3 1033064051301015552, WD 0812+553, LAMOST J081649.29+550910.0, SDSS J081649.30+550910.1, Gaia EDR3 1033064051301015552, [HHD2009] SDSS J0816+5509, SDSS J081649.29+550910.0, SDSS J081649.32+550910.0, Gaia DR2 1033064051301015552, GALEX J081649.3+550910, SDSS J081649.32+550909.9
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 16 49.33 (0.2) | 08 16 49.33 | 08 16 49.33 (0.2) | 08 16 49.29 | 08 16 49.33 (0.2) | 08 16 48.77 | 08 16 49.30 | ||||
| Declination | 55 09 09.83 (0.1) | 55 09 10.02 | 55 09 09.84 (0.2) | 55 09 10.01 | 55 09 10.03 (0.1) | 55 09 07.92 | 55 09 10.09 | ||||
| Spectral type | DA+M | DA+M | DA2.8 | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 19640.0 (806) | 9497.0 (77) | ||||||||
| log(g) | [cgs] | 7.71 (0.1) | 8.50 (0.09) | ||||||||
| Mass | [M☉] | 0.47 (0.07) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.02 (0.2) | 2.02 (0.3) | 2.02 (0.2) | |||||||
| Distance | [pc] | 495.95 (51) | 495.71 (79) | 336.00 (21) | 495.96 (51) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -0.12411245 (0.2) | 0.475670108 (0.5) | -0.124 (0.2) | |||||||
| Proper motion (declination) | [mas/yr] | -12.17612612 (0.2) | -11.89454007 (0.3) | -12.176 (0.2) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | yes | WDMS | WDMS | |||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 19.34 (0.02) | 19.24 | 19.34 (0.03) | 19.23 | 19.22 (0.03) | ||||||
| g magnitude | 19.15 (0.01) | 19.08 | 19.05 (0.009) | 19.07 | 19.08 (0.02) | ||||||
| r magnitude | 19.27 (0.01) | 19.11 | 19.10 (0.01) | 19.11 | 19.11 (0.02) | ||||||
| i magnitude | 18.93 (0.01) | 18.89 | 18.86 (0.01) | 18.88 | 18.88 (0.02) | ||||||
| z magnitude | 18.46 (0.03) | 18.38 | 18.38 (0.03) | 18.37 | 18.38 (0.03) | ||||||
| G magnitude | 18.98 (0.05) | 19.00 | 18.98 (0.004) | ||||||||
| BP magnitude | 19.13 (0.05) | 19.15 | |||||||||
| RP magnitude | 18.47 (0.03) | 18.41 | |||||||||
| Pan g magnitude | 19.15 (0.008) | ||||||||||
| Pan r magnitude | 19.25 (0.009) | ||||||||||
| Pan i magnitude | 18.93 (0.007) | ||||||||||
| Pan z magnitude | 18.54 (0.01) | ||||||||||
| Pan y magnitude | 18.29 (0.01) | ||||||||||
| E(B-V) | 0.039 | ||||||||||
* 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.