All names: Gaia EDR3 1796522152051048064, UCAC2 40949202, 2MASS J21585256+2532038, UCAC4 578-128941, HS2156+2517, Gaia DR3 1796522152051048064, HS 2156+2517, Gaia DR2 1796522152051048064, TIC 18105506
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 58 52.56 (0.03) | 21 58 52.59 | 21 58 52.57 (0.03) | ||
| Declination | 25 32 03.84 (0.04) | 25 32 03.91 | 25 32 03.82 (0.04) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 34700.0 (900) | |||
| log(g) | [cgs] | 6.10 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.04 (0.05) | 1.09 (0.07) | 1.04 (0.05) | |
| Distance | [pc] | 958.41 (45) | 914.49 (58) | 958.41 (45) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.175 (0.04) | -4.186 (0.1) | -4.175 (0.04) | |
| Proper motion (declination) | [mas/yr] | 1.419 (0.05) | 1.287 (0.1) | 1.419 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.97 (0.04) | ||||
| V magnitude | 15.23 (0.07) | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.71 (0.07) | 15.71 (0.07) | |||
| H magnitude | 16.19 (0.3) | 16.19 (0.3) | |||
| K magnitude | 15.65 | ||||
| u magnitude | 14.51 (0.004) | ||||
| g magnitude | 14.76 (0.004) | 14.96 (0.03) | |||
| r magnitude | 15.25 (0.004) | 15.43 (0.05) | |||
| i magnitude | 15.60 (0.005) | 15.85 (0.07) | |||
| z magnitude | 15.92 (0.007) | ||||
| G magnitude | 15.17 (0.003) | 15.19 (0.0006) | 15.17 (0.003) | ||
| BP magnitude | 15.03 (0.003) | 14.98 (0.007) | |||
| RP magnitude | 15.44 (0.004) | 15.44 (0.003) | |||
| Pan g magnitude | 15.00 (0.002) | ||||
| Pan r magnitude | 15.43 (0.003) | ||||
| Pan i magnitude | 15.78 (0.002) | ||||
| Pan z magnitude | 16.05 (0.005) | ||||
| Pan y magnitude | 16.23 (0.003) | ||||
| E(B-V) | 0.065 | ||||
* 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.