All names: SDSSJ201216.17+081608.2, 2MASS J20121617+0816083, TIC 273084007, Gaia DR2 4251149700348007680, Gaia DR3 4251149700348007680, WISE J201216.16+081608.2, UCAC4 492-129533, LAMOST J201216.16+081608.8, SDSS J201216.17+081608.2, GALEX J201216.1+081608
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 12 16.17 | 20 12 16.17 (0.03) | ||
| Declination | 08 16 08.21 | 08 16 08.26 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 27730.0 (220) | ||
| log(g) | [cgs] | 5.39 (0.06) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.91 (0.05) | 0.95 (0.03) | |
| Distance | [pc] | 1104.61 (66) | 1054.63 (37) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.956 (0.07) | -1.909 (0.04) | |
| Proper motion (declination) | [mas/yr] | -11.547 (0.06) | -11.506 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.57 (0.01) | |||
| V magnitude | 14.67 (0.01) | |||
| R magnitude | 14.91 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.94 (0.04) | 14.94 (0.04) | ||
| H magnitude | 15.12 (0.1) | 15.12 (0.1) | ||
| K magnitude | 15.01 (0.1) | 15.01 (0.1) | ||
| u magnitude | 14.41 (0.004) | 14.43 (0.01) | ||
| g magnitude | 14.41 (0.003) | 14.42 (0.01) | ||
| r magnitude | 14.76 (0.004) | 14.76 (0.01) | ||
| i magnitude | 15.05 (0.004) | 15.04 (0.01) | ||
| z magnitude | 15.30 (0.006) | 15.29 (0.02) | ||
| G magnitude | 14.62 (0.0005) | 14.60 (0.003) | ||
| BP magnitude | 14.49 (0.004) | |||
| RP magnitude | 14.74 (0.001) | |||
| Pan g magnitude | 14.50 (0.005) | |||
| Pan r magnitude | 14.80 (0.003) | |||
| Pan i magnitude | 15.09 (0.002) | |||
| Pan z magnitude | 15.31 (0.002) | |||
| Pan y magnitude | 15.46 (0.005) | |||
| E(B-V) | 0.099 | |||
* 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.