All names: SDSS J121215.30+313853.5, GALEX J121215.3+313854, Gaia DR2 4014827847960016000, Gaia EDR3 4014827847960016000, Gaia DR3 4014827847960016000, SDSS J121215.29+313853.5, SDSS J121215.30+313853.6
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 12 15.28 (0.4) | 12 12 15.30 | 12 12 15.28 (0.6) | 12 12 15.31 (0.4) | 12 12 15.30 | |||
| Declination | 31 38 53.65 (0.3) | 31 38 53.55 | 31 38 53.65 (0.4) | 31 38 53.61 (0.3) | 31 38 53.60 | |||
| Spectral type | DA | DA | DA | |||||
| Effective temperature | [K] | 16005.0 (498) | ||||||
| log(g) | [cgs] | 8.12 (0.1) | ||||||
| Mass | [M☉] | 0.68 (0.07) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 2.70 (0.5) | 2.63 (0.7) | 2.70 (0.5) | ||||
| Distance | [pc] | 369.91 (71) | 380.83 (108) | 369.90 (71) | ||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -23.86296656 (0.5) | -24.56260975 (1) | -23.863 (0.5) | ||||
| Proper motion (declination) | [mas/yr] | 2.93662549 (0.4) | 3.453107139 (0.9) | 2.937 (0.4) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 20.06 (0.04) | 20.06 (0.04) | 19.99 (0.06) | |||||
| g magnitude | 19.82 (0.02) | 19.82 (0.02) | 19.83 (0.02) | |||||
| r magnitude | 20.08 (0.02) | 20.08 (0.02) | 20.10 (0.03) | |||||
| i magnitude | 20.41 (0.05) | 20.41 (0.04) | 20.43 (0.05) | |||||
| z magnitude | 21.06 (0.3) | 21.06 (0.3) | 20.98 (0.2) | |||||
| G magnitude | 19.94 (0.07) | 20.01 | 19.94 (0.005) | |||||
| BP magnitude | 19.88 (0.07) | 20.08 | ||||||
| RP magnitude | 20.06 (0.09) | 20.22 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| 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.