All names: USNO-A2.0 1275-08073397, Gaia EDR3 1533004910344550144, GALEX 2686760029506243569, Gaia DR3 1533004910344550144, SDSS J122040.02+393053.5, Gaia DR2 1533004910344550144
| Parameter | Unit | Gaia EDR3 | Vincent et al. 2023 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 20 40.02 (0.2) | 12 20 40.03 (0.3) | |||
| Declination | 39 30 53.46 (0.1) | 39 30 53.55 (0.2) | |||
| Spectral type | DA | DA | |||
| 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] | 4.06 (0.2) | 4.18 (0.3) | ||
| Distance | [pc] | 246.29 (13) | 239.23 (16) | ||
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -8.994 (0.2) | -9.305 (0.5) | ||
| Proper motion (declination) | [mas/yr] | -5.724 (0.2) | -5.749 (0.3) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 18.10 (0.3) | ||||
| V magnitude | |||||
| R magnitude | 18.60 (0.3) | ||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 19.24 (0.02) | ||||
| g magnitude | 18.92 (0.009) | ||||
| r magnitude | 19.03 (0.01) | ||||
| i magnitude | 19.23 (0.02) | ||||
| z magnitude | 19.43 (0.06) | ||||
| G magnitude | 18.96 (0.004) | 18.99 (0.003) | |||
| BP magnitude | 19.04 (0.02) | ||||
| RP magnitude | 19.03 (0.05) | ||||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.015 | ||||
* 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.