All names: LAMOST J122023.05+143926.8, SDSS J122023.05+143926.8, A3 16, Gaia DR2 3921201619652632960, PB3941, Gaia DR3 3921201619652632960, GALEX J122023.1+143927, WISE J122023.09+143926.2, [BGK2006] J122023.06+143926.9, PB 3941
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 12 20 23.06 | 12 20 23.06 (0.06) | ||
| Declination | 14 39 26.85 | 14 39 26.86 (0.04) | ||
| Spectral type | sdB | sdB/sdO | ||
| Effective temperature | [K] | 21002.0 (42) | ||
| log(g) | [cgs] | 4.97 (0.01) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.23 (0.09) | 0.20 (0.06) | |
| Distance | [pc] | 4438.53 (1842) | 5047.96 (1554) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.37 (0.2) | -2.196 (0.07) | |
| Proper motion (declination) | [mas/yr] | -1.556 (0.1) | -1.806 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 16.73 (0.007) | 16.72 (0.007) | ||
| g magnitude | 16.42 (0.004) | 16.42 (0.004) | ||
| r magnitude | 16.76 (0.004) | 16.75 (0.004) | ||
| i magnitude | 17.02 (0.005) | 17.02 (0.005) | ||
| z magnitude | 17.21 (0.01) | 17.23 (0.01) | ||
| G magnitude | 16.63 (0.001) | 16.60 (0.003) | ||
| BP magnitude | 16.53 (0.004) | |||
| RP magnitude | 16.70 (0.01) | |||
| Pan g magnitude | 16.47 (0.005) | |||
| Pan r magnitude | 16.77 (0.003) | |||
| Pan i magnitude | 17.05 (0.005) | |||
| Pan z magnitude | 17.24 (0.006) | |||
| Pan y magnitude | 17.33 (0.008) | |||
| E(B-V) | 0.022 | |||
* 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.