All names: PG 2128+096, UCAC4 500-142768, Gaia EDR3 1742021628404121600, PG2128+096, Balloon 92200007, Gaia DR3 1742021628404121600, 2MASS J21304250+0950209, TIC 291976913, GALEX J213042.4+095020, UCAC2 35310507, Gaia DR2 1742021628404121600
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 30 42.49 (0.03) | 21 30 42.56 | 21 30 42.51 (0.03) | ||
| Declination | 09 50 20.44 (0.03) | 09 50 22.09 | 09 50 20.79 (0.03) | ||
| Spectral type | He-sdOB | sdB | |||
| Effective temperature | [K] | 39400.0 (1000) | |||
| log(g) | [cgs] | 5.87 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.18 (0.04) | 1.15 (0.06) | 1.18 (0.04) | |
| Distance | [pc] | 844.45 (27) | 871.99 (45) | 844.45 (27) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -13.067 (0.04) | -13.173 (0.1) | -13.067 (0.04) | |
| Proper motion (declination) | [mas/yr] | -21.456 (0.03) | -21.59 (0.1) | -21.456 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.47 (0.06) | ||||
| V magnitude | 14.76 (0.02) | ||||
| R magnitude | 15.07 (0.08) | ||||
| I magnitude | |||||
| J magnitude | 15.29 (0.05) | 15.29 (0.05) | |||
| H magnitude | 15.36 (0.1) | 15.36 (0.1) | |||
| K magnitude | 15.28 (0.2) | 15.28 (0.2) | |||
| u magnitude | 14.43 (0.005) | ||||
| g magnitude | 14.78 (0.005) | ||||
| r magnitude | 15.10 (0.005) | ||||
| i magnitude | 15.40 (0.005) | ||||
| z magnitude | 15.49 (0.007) | ||||
| G magnitude | 14.70 (0.003) | 14.71 (0.001) | 14.70 (0.003) | ||
| BP magnitude | 14.56 (0.003) | 14.51 (0.01) | |||
| RP magnitude | 14.97 (0.004) | 14.97 (0.003) | |||
| Pan g magnitude | 14.55 (0.008) | ||||
| Pan r magnitude | 14.95 (0.002) | ||||
| Pan i magnitude | 15.30 (0.002) | ||||
| Pan z magnitude | 15.57 (0.005) | ||||
| Pan y magnitude | 15.77 (0.006) | ||||
| E(B-V) | 0.041 | ||||
* 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.