All names: 2MASS J23415674+2012222, SDSS J234156.73+201222.4, TIC 113496532, Gaia EDR3 2823151036672049280, USNO-B1.0 1102-00616227, UCAC4 552-139449, PG 2339+199, Gaia DR2 2823151036672049280, PG2339+199, WISEA J234156.75+201222.1, Gaia DR3 2823151036672049280, WISE J234156.77+201222.8
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 23 41 56.74 (0.05) | 23 41 56.69 | 23 41 56.73 (0.05) | ||
| Declination | 20 12 22.48 (0.03) | 20 12 22.69 | 20 12 22.51 (0.03) | ||
| Spectral type | He-sdB | sdBC1VIIHe34 | |||
| 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] | 0.85 (0.06) | 0.82 (0.09) | 0.85 (0.06) | |
| Distance | [pc] | 1177.86 (80) | 1225.94 (133) | 1177.86 (80) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 7.974 (0.06) | 7.791 (0.2) | 7.974 (0.06) | |
| Proper motion (declination) | [mas/yr] | -1.699 (0.04) | -1.623 (0.09) | -1.699 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.80 | ||||
| V magnitude | |||||
| R magnitude | 15.38 | ||||
| I magnitude | |||||
| J magnitude | 16.70 (0.1) | 16.70 (0.1) | |||
| H magnitude | 16.32 (0.2) | 16.32 (0.2) | |||
| K magnitude | 16.13 | ||||
| u magnitude | 15.61 (0.005) | ||||
| g magnitude | 15.84 (0.003) | ||||
| r magnitude | 16.22 (0.004) | ||||
| i magnitude | 16.51 (0.005) | ||||
| z magnitude | 16.78 (0.01) | ||||
| G magnitude | 16.02 (0.003) | 16.04 (0.001) | 16.02 (0.003) | ||
| BP magnitude | 15.90 (0.004) | 15.85 (0.006) | |||
| RP magnitude | 16.21 (0.005) | 16.22 (0.004) | |||
| Pan g magnitude | 15.87 (0.003) | ||||
| Pan r magnitude | 16.20 (0.003) | ||||
| Pan i magnitude | 16.55 (0.002) | ||||
| Pan z magnitude | 16.80 (0.003) | ||||
| Pan y magnitude | 18.09 (0.04) | ||||
| E(B-V) | 0.049 | ||||
* 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.