All names: Gaia DR3 1987963653489961088, KPD 2237+4924, UCAC4 699-113057, KPD2237+4924, USNO-B1.0 1396-00465390, Gaia DR2 1987963653489961088
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 39 36.13 | 22 39 36.02 (0.02) | ||
| Declination | 49 40 36.45 | 49 40 36.25 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.38 (0.04) | 0.43 (0.03) | |
| Distance | [pc] | 2631.58 (309) | 2305.74 (162) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -12.252 (0.07) | -12.288 (0.03) | |
| Proper motion (declination) | [mas/yr] | -7.742 (0.07) | -7.676 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.05 | |||
| V magnitude | 14.92 | |||
| R magnitude | 15.73 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.34 (0.04) | |||
| H magnitude | 13.83 (0.05) | |||
| K magnitude | 13.68 (0.04) | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.28 (0.0007) | 15.25 (0.003) | ||
| BP magnitude | 15.17 (0.004) | |||
| RP magnitude | 15.35 (0.002) | |||
| Pan g magnitude | 15.18 (0.001) | |||
| Pan r magnitude | 15.45 (0.003) | |||
| Pan i magnitude | 15.70 (0.002) | |||
| Pan z magnitude | 15.90 (0.003) | |||
| Pan y magnitude | 16.04 (0.006) | |||
| E(B-V) | 0.171 | |||
* 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.