All names: KPD 2109+4401, Gaia EDR3 1970289725639077120, V* V2203 Cyg, 2MASS J21114765+4413507, Gaia DR3 1970289725639077120, UCAC4 672-090990, TIC 136975077, KPD2109+4401, GSC 03181-03975, UCAC2 46965883, Gaia DR2 1970289725639077120
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 11 47.61 (0.02) | 21 11 47.71 | 21 11 47.64 (0.02) | ||
| Declination | 44 13 50.27 (0.02) | 44 13 51.57 | 44 13 50.62 (0.02) | ||
| Spectral type | sdBV | sdB | |||
| Effective temperature | [K] | 31800.0 | |||
| log(g) | [cgs] | 5.79 | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.79 (0.03) | 1.85 (0.03) | 1.79 (0.03) | |
| Distance | [pc] | 558.28 (8) | 539.58 (9) | 558.28 (8) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -24.287 (0.03) | -24.31 (0.06) | -24.287 (0.03) | |
| Proper motion (declination) | [mas/yr] | -22.02 (0.03) | -22.047 (0.06) | -22.02 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.11 (0.07) | ||||
| V magnitude | 13.30 (0.06) | ||||
| R magnitude | 13.64 (0.09) | ||||
| I magnitude | |||||
| J magnitude | 13.88 (0.03) | 13.88 (0.03) | |||
| H magnitude | 13.98 (0.04) | 13.98 (0.04) | |||
| K magnitude | 14.03 (0.07) | 14.03 (0.07) | |||
| u magnitude | |||||
| g magnitude | 13.10 (0.06) | ||||
| r magnitude | 13.48 (0.05) | ||||
| i magnitude | 13.72 (0.2) | ||||
| z magnitude | |||||
| G magnitude | 13.34 (0.003) | 13.36 (0.0007) | 13.34 (0.003) | ||
| BP magnitude | 13.22 (0.003) | 13.18 (0.006) | |||
| RP magnitude | 13.57 (0.004) | 13.57 (0.002) | |||
| Pan g magnitude | 13.18 (0.02) | ||||
| Pan r magnitude | 13.60 (0) | ||||
| Pan i magnitude | 13.95 (0.004) | ||||
| Pan z magnitude | 14.18 (0.005) | ||||
| Pan y magnitude | 14.35 (0.002) | ||||
| E(B-V) | 0.122 | ||||
* 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.