All names: SDSS J083402.88+300144.3, Gaia DR3 707854732582604288, GALEX J083402.9+300144, SDSS J083402.89+300144.4, Gaia DR2 707854728285227264, WD 0830+302, SDSS J083402.88+300144.4, Gaia EDR3 707854732582604288
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 34 02.88 (1) | 08 34 02.89 | 08 34 02.88 (3) | 08 34 02.88 | 08 34 02.89 (1) | 08 34 02.89 | 08 34 02.23 | 08 34 02.89 | ||||
| Declination | 30 01 44.23 (1) | 30 01 44.38 | 30 01 44.24 (1) | 30 01 44.29 | 30 01 44.40 (1) | 30 01 44.40 | 30 01 41.16 | 30 01 44.39 | ||||
| Spectral type | DA+M | DA+M | DA_auto | DA | DA+M | DA | ||||||
| Effective temperature | [K] | 20098.0 (2207) | 10644.0 (299) | 10606.0 (295) | ||||||||
| log(g) | [cgs] | 8.33 (0.4) | 8.75 (0.2) | 8.91 (0.2) | ||||||||
| Mass | [M☉] | 0.83 (0.2) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 3.32 (1) | 3.32 (1) | |||||||||
| Distance | [pc] | 301.60 (117) | 1071.00 (455) | 301.60 (117) | ||||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -9.175602377 (2) | -9.176 (2) | -7.3 | ||||||||
| Proper motion (declination) | [mas/yr] | -10.37460248 (0.8) | -10.375 (0.8) | -10.4 | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | ||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 20.64 (0.07) | 20.44 | 20.40 (0.07) | 20.44 (0.06) | 20.43 | 20.42 (0.06) | ||||||
| g magnitude | 20.23 (0.02) | 20.28 | 20.25 (0.02) | 20.28 (0.02) | 20.27 | 20.26 (0.02) | ||||||
| r magnitude | 20.45 (0.03) | 20.52 | 20.49 (0.04) | 20.52 (0.04) | 20.51 | 20.52 (0.04) | ||||||
| i magnitude | 20.41 (0.05) | 20.50 | 20.46 (0.05) | 20.50 (0.05) | 20.49 | 20.50 (0.05) | ||||||
| z magnitude | 19.99 (0.1) | 20.37 | 20.30 (0.1) | 20.37 (0.1) | 20.36 | 20.37 (0.1) | ||||||
| G magnitude | 20.46 (0.08) | 20.51 | 20.46 (0.009) | |||||||||
| BP magnitude | 20.22 (0.08) | 20.00 | ||||||||||
| RP magnitude | 20.27 (0.1) | 19.94 | ||||||||||
| Pan g magnitude | 20.26 (0.06) | |||||||||||
| Pan r magnitude | 20.47 (0.06) | |||||||||||
| Pan i magnitude | 20.47 (0.02) | |||||||||||
| Pan z magnitude | 20.22 (0.04) | |||||||||||
| Pan y magnitude | 19.86 (0.04) | |||||||||||
| 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.