All names: SDSS J122855.12+135937.5, USNO-B1.0 1039-00202839, Gaia DR2 3932829638019440384, Gaia EDR3 3932829638019440384, LP 495-122, Gaia DR3 3932829638019440384, WD 1226+142, GALEX J122855.0+135936, ULAS J122855.13+135937.5
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|
| Right ascension | 12 28 55.12 (0.1) | 12 28 55.12 (0.2) | 12 28 55.12 (0.1) | 12 28 55.73 | ||
| Declination | 13 59 37.39 (0.1) | 13 59 37.39 (0.2) | 13 59 37.55 (0.1) | 13 59 25.08 | ||
| Spectral type | DC | DC | ||||
| Effective temperature | [K] | |||||
| log(g) | [cgs] | |||||
| Mass | [M☉] | |||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | 0.41 (0.2) | 0.50 (0.3) | 0.41 (0.2) | ||
| Distance | [pc] | 2432.24 (1230) | 1982.55 (1080) | 2432.50 (1231) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | 3.776139594 (0.2) | 3.976 (0.4) | 3.776 (0.2) | ||
| Proper motion (declination) | [mas/yr] | -10.04205498 (0.2) | -10.123 (0.3) | -10.042 (0.2) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | yes | |||||
| B magnitude | 18.50 | |||||
| V magnitude | ||||||
| R magnitude | 18.40 | |||||
| I magnitude | ||||||
| J magnitude | 17.37 (0.04) | |||||
| H magnitude | 17.16 (0.04) | |||||
| K magnitude | 16.96 (0.06) | |||||
| u magnitude | ||||||
| g magnitude | ||||||
| r magnitude | ||||||
| i magnitude | ||||||
| z magnitude | ||||||
| G magnitude | 18.29 (0.03) | 18.31 | 18.29 (0.003) | |||
| BP magnitude | 18.56 (0.03) | 18.47 | ||||
| RP magnitude | 17.82 (0.03) | 17.67 | ||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.025 | |||||
* 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.