All names: Gaia DR2 1950263255195349888, Gaia DR3 1950263255195349888, Gaia EDR3 1950263530073396736, LAMOST J213818.52+342105.6, UCAC4 622-119980, WISEA J213818.44+342105.2, GALEX J213818.4+342104, 2MASS J21381854+3421057, LAMOSTJ213818.52+342105.6, TIC 266649709, WISE J213818.45+342105.2
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 38 14.37 (0.2) | 21 38 18.53 | 21 38 18.55 (0.01) | ||
| Declination | 34 22 48.60 (0.3) | 34 21 05.64 | 34 21 05.78 (0.02) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 30941.0 (93) | |||
| log(g) | [cgs] | 5.49 (0.02) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.39 (0.5) | 0.96 (0.04) | 0.94 (0.03) | |
| Distance | [pc] | 720.15 (253) | 1043.62 (41) | 1062.47 (29) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 8.971 (0.3) | -10.779 (0.04) | -10.756 (0.02) | |
| Proper motion (declination) | [mas/yr] | 2.912 (0.4) | -7.054 (0.06) | -6.966 (0.02) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.66 (0.09) | ||||
| V magnitude | 14.66 (0.07) | ||||
| R magnitude | 15.24 (0.4) | ||||
| I magnitude | |||||
| J magnitude | 14.84 (0.05) | 14.84 (0.05) | |||
| H magnitude | 14.93 (0.08) | 14.93 (0.08) | |||
| K magnitude | 15.00 (0.2) | 15.00 (0.2) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 20.25 (0.005) | 14.74 (0.0004) | 14.73 (0.003) | ||
| BP magnitude | 20.27 (0.04) | 14.62 (0.003) | |||
| RP magnitude | 20.23 (0.06) | 14.81 (0.002) | |||
| Pan g magnitude | 14.59 (0.0007) | ||||
| Pan r magnitude | 14.85 (0.003) | ||||
| Pan i magnitude | 15.11 (0.003) | ||||
| Pan z magnitude | 15.33 (0.006) | ||||
| Pan y magnitude | 15.45 (0.01) | ||||
| E(B-V) | 0.147 | ||||
* 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.