All names: 2MASS J21385304+4024158, Gaia DR2 1966389723521001728, LAMOSTJ213853.04+402415.7, Gaia DR3 1966389723521001728, UCAC4 653-107038, TIC 372181885, LAMOST J213853.04+402415.7, Gaia EDR3 1966389787938163968, WISE J213853.04+402415.6
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 38 50.68 (0.2) | 21 38 53.05 | 21 38 53.05 (0.01) | ||
| Declination | 40 24 41.85 (0.3) | 40 24 15.76 | 40 24 15.76 (0.01) | ||
| Spectral type | He-sdB | sdB/sdO | |||
| Effective temperature | [K] | 22135.0 (107) | |||
| log(g) | [cgs] | 4.85 (0) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.20 (0.3) | 0.34 (0.03) | 0.36 (0.02) | |
| Distance | [pc] | 835.77 (232) | 2912.06 (257) | 2750.28 (142) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -10.464 (0.3) | -4.076 (0.05) | -4.029 (0.02) | |
| Proper motion (declination) | [mas/yr] | -13.24 (0.4) | -5.98 (0.05) | -5.962 (0.02) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.60 (0.04) | ||||
| V magnitude | 14.55 (0.06) | ||||
| R magnitude | 14.66 (0.07) | ||||
| I magnitude | |||||
| J magnitude | 14.32 (0.03) | 14.32 (0.03) | |||
| H magnitude | 14.37 (0.06) | 14.37 (0.06) | |||
| K magnitude | 14.46 (0.07) | 14.46 (0.07) | |||
| u magnitude | |||||
| g magnitude | 14.48 (0.03) | ||||
| r magnitude | 14.65 (0.04) | ||||
| i magnitude | 14.85 (0.08) | ||||
| z magnitude | |||||
| G magnitude | 19.87 (0.004) | 14.49 (0.0004) | 14.47 (0.003) | ||
| BP magnitude | 19.97 (0.05) | 14.50 (0.004) | |||
| RP magnitude | 19.99 (0.09) | 14.40 (0.002) | |||
| Pan g magnitude | 14.47 (0.003) | ||||
| Pan r magnitude | 14.59 (0.002) | ||||
| Pan i magnitude | 14.75 (0.001) | ||||
| Pan z magnitude | 14.88 (0.005) | ||||
| Pan y magnitude | 14.92 (0.007) | ||||
| E(B-V) | 0.290 | ||||
* 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.