All names: Gaia DR3 4422977731105667072, 2MASS J15444401+0129335, SDSS J154443.99+012933.4, Gaia EDR3 4422977731105667072, GALEX J154444.0+012933, TIC 292973118, Gaia DR2 4422977731105667072
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|
| Right ascension | 15 44 44.00 (0.5) | 15 44 43.99 | 15 44 44.00 (0.7) | 15 44 43.99 (0.5) | 15 44 43.99 | ||
| Declination | 01 29 33.45 (0.5) | 01 29 33.42 | 01 29 33.45 (0.5) | 01 29 33.58 (0.5) | 01 29 33.40 | ||
| Spectral type | DA+M | DA+M | |||||
| Effective temperature | [K] | 6301.0 (4) | |||||
| log(g) | [cgs] | 5.47 (0.3) | |||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | -0.24 (0.7) | -0.25 (0.8) | ||||
| Distance | [pc] | ||||||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | 6.55932704 (0.7) | 4.676488544 (1) | 6.559 (0.7) | |||
| Proper motion (declination) | [mas/yr] | -8.663806623 (0.7) | -5.331626878 (1) | -8.664 (0.7) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | WDMS | ||||||
| B magnitude | |||||||
| V magnitude | |||||||
| R magnitude | |||||||
| I magnitude | |||||||
| J magnitude | 16.64 (0.1) | ||||||
| H magnitude | 16.25 (0.2) | ||||||
| K magnitude | 15.68 (0.2) | ||||||
| u magnitude | 19.81 (0.04) | 19.80 (0.04) | 19.80 (0.04) | ||||
| g magnitude | 19.55 (0.01) | 19.56 (0.02) | 19.56 (0.02) | ||||
| r magnitude | 19.04 (0.01) | 19.03 (0.02) | 19.03 (0.02) | ||||
| i magnitude | 18.42 (0.01) | 18.40 (0.02) | 18.40 (0.02) | ||||
| z magnitude | 17.94 (0.02) | 17.94 (0.03) | 17.94 (0.03) | ||||
| G magnitude | 19.10 (0.05) | 19.00 | 19.10 (0.01) | ||||
| BP magnitude | 19.42 (0.05) | 19.44 | |||||
| RP magnitude | 18.05 (0.02) | 18.03 | |||||
| Pan g magnitude | 19.52 (0.01) | ||||||
| Pan r magnitude | 19.05 (0.007) | ||||||
| Pan i magnitude | 18.43 (0.004) | ||||||
| Pan z magnitude | 18.10 (0.003) | ||||||
| Pan y magnitude | 17.88 (0.01) | ||||||
| E(B-V) | |||||||
* 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.