All names: UCAC4 721-021579, Gaia DR3 455558286215251840, Gaia DR2 455558286215251840, LAMOST J022141.57+540653.4, LAMOSTJ022141.57+540653.4
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 02 21 41.57 | 02 21 41.57 (0.03) | ||
| Declination | 54 06 53.45 | 54 06 53.43 (0.04) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 27580.0 (330) | ||
| log(g) | [cgs] | 5.54 (0.09) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.49 (0.07) | 0.41 (0.06) | |
| Distance | [pc] | 2037.91 (302) | 2414.88 (343) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.721 (0.1) | 1.548 (0.04) | |
| Proper motion (declination) | [mas/yr] | 1.164 (0.1) | 1.046 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.74 (0.001) | 16.70 (0.003) | ||
| BP magnitude | 16.64 (0.006) | |||
| RP magnitude | 16.73 (0.004) | |||
| Pan g magnitude | 16.64 (0.006) | |||
| Pan r magnitude | 16.85 (0.002) | |||
| Pan i magnitude | 17.06 (0.006) | |||
| Pan z magnitude | 17.26 (0.006) | |||
| Pan y magnitude | 17.34 (0.01) | |||
| E(B-V) | 0.217 | |||
* 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.