All names: SDSS J234421.79-101142.7, GALEX J234421.7-101142, 2MASS J23442181-1011427, GD 1321, Gaia EDR3 2435377440450198784, UCAC4 400-139057, TIC 9053429, [BGK2006] J234421.80-101142.7, Gaia DR2 2435377440450198784, UCAC2 28301391, SDSSJ234421.79-101142.7, SDSS J234421.79-101142.6, Gaia DR3 2435377440450198784
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 44 21.80 (0.04) | 23 44 21.80 | 23 44 21.80 | 23 44 21.80 (0.07) | 23 44 21.80 (0.04) | 23 44 21.80 | |||
| Declination | -10 11 42.79 (0.03) | -10 11 42.73 | -10 11 42.72 | -10 11 42.79 (0.04) | -10 11 42.68 (0.03) | -10 11 42.66 | |||
| Spectral type | sdB | sdB | SDB | ||||||
| Effective temperature | [K] | 7549.0 (10) | |||||||
| log(g) | [cgs] | 5.00 (0.002) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.17 (0.05) | 0.16 (0.07) | 0.16 (0.07) | 0.17 (0.05) | ||||
| Distance | [pc] | 5906.86 (1584) | 6180.47 (2762) | 6180.47 (2762) | 5906.67 (1584) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 1.026208906 (0.06) | 1.18 (0.2) | 1.18 (0.2) | 1.026 (0.06) | 0.5 | |||
| Proper motion (declination) | [mas/yr] | -7.277580847 (0.04) | -7.31 (0.09) | -7.31 (0.09) | -7.278 (0.04) | 0.6 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.66 (0.06) | ||||||||
| V magnitude | 15.72 (0.07) | ||||||||
| R magnitude | 15.86 (0.08) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.75 (0.06) | 15.75 (0.06) | |||||||
| H magnitude | 15.84 (0.1) | 15.84 (0.1) | |||||||
| K magnitude | 15.73 (0.3) | 15.73 (0.3) | |||||||
| u magnitude | 16.20 (0.006) | 16.20 (0.006) | 16.20 (0.006) | 16.15 (0.07) | |||||
| g magnitude | 15.52 (0.003) | 15.52 (0.003) | 15.52 (0.003) | 15.53 (0.02) | |||||
| r magnitude | 15.80 (0.004) | 15.80 (0.004) | 15.80 (0.004) | 15.82 (0.01) | |||||
| i magnitude | 16.01 (0.004) | 16.01 (0.004) | 16.01 (0.004) | 16.04 (0.03) | |||||
| z magnitude | 16.18 (0.009) | 16.18 (0.009) | 16.18 (0.009) | 16.19 (0.02) | |||||
| G magnitude | 15.66 (0.002) | 15.68 (0.001) | 15.68 | 15.66 (0.003) | |||||
| BP magnitude | 15.65 (0.002) | 15.63 (0.004) | 15.63 | ||||||
| RP magnitude | 15.70 (0.003) | 15.69 (0.008) | 15.69 | ||||||
| Pan g magnitude | 15.57 (0.004) | 15.57 (0.004) | |||||||
| Pan r magnitude | 15.81 (0.004) | 15.81 (0.004) | |||||||
| Pan i magnitude | 16.04 (0.002) | 16.04 (0.002) | |||||||
| Pan z magnitude | 16.21 (0.003) | 16.21 (0.003) | |||||||
| Pan y magnitude | 16.28 (0.007) | 16.28 (0.007) | |||||||
| E(B-V) | 0.017 | ||||||||
* 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.