All names: 2MASS J21214944+2022167, LAMOST J212149.51+202217.0, TIC 282946361, Gaia DR2 1790305753825533312, SDSS J212149.44+202216.8, LAMOST J212149.46+202216.6, GALEX J212149.5+202217, SDSSJ212149.44+202216.8, Gaia DR3 1790305753825533312
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 21 49.45 | 21 21 49.45 (0.04) | ||
| Declination | 20 22 16.81 | 20 22 16.76 (0.03) | ||
| Spectral type | sdOB | sdO | ||
| Effective temperature | [K] | 41141.0 (260) | ||
| log(g) | [cgs] | 5.60 (0.04) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.43 (0.09) | 0.47 (0.05) | |
| Distance | [pc] | 2311.07 (456) | 2119.09 (231) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.943 (0.1) | -1.004 (0.05) | |
| Proper motion (declination) | [mas/yr] | -7.245 (0.1) | -7.562 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.10 (0.09) | 16.10 (0.09) | ||
| H magnitude | 16.16 (0.2) | 16.16 (0.2) | ||
| K magnitude | 16.08 | |||
| u magnitude | 14.87 (0.004) | 14.80 (0.02) | ||
| g magnitude | 15.11 (0.003) | 15.13 (0.01) | ||
| r magnitude | 15.60 (0.004) | 15.59 (0.008) | ||
| i magnitude | 15.95 (0.004) | 15.92 (0.007) | ||
| z magnitude | 16.24 (0.008) | 16.23 (0.01) | ||
| G magnitude | 15.37 (0.0007) | 15.36 (0.003) | ||
| BP magnitude | 15.18 (0.01) | |||
| RP magnitude | 15.63 (0.004) | |||
| Pan g magnitude | 15.21 (0.002) | |||
| Pan r magnitude | 15.62 (0.002) | |||
| Pan i magnitude | 15.96 (0.002) | |||
| Pan z magnitude | 16.22 (0.003) | |||
| Pan y magnitude | 16.42 (0.007) | |||
| E(B-V) | 0.076 | |||
* 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.