All names: 2MASS J12210833+1550055, WISE J122108.32+155005.5, SDSS J122108.32+155005.7, TIC 357400461, SDSS J122108.33+155005.6, Gaia EDR3 3945498180926839552, Gaia DR3 3945498180926839680, Gaia DR2 3945498176630632320, WISEA J122108.32+155005.4, LBQS1218+1606
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 21 08.14 (0.2) | 12 21 08.31 | 12 21 08.34 (0.2) | ||
| Declination | 15 50 05.32 (0.1) | 15 50 05.88 | 15 50 05.65 (0.2) | ||
| Spectral type | 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] | 2.49 (0.2) | 1.83 (0.4) | 2.27 (0.3) | |
| Distance | [pc] | 402.35 (35) | 547.65 (126) | 440.51 (54) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -28.223 (0.2) | -26.378 (0.7) | -28.022 (0.3) | |
| Proper motion (declination) | [mas/yr] | -0.053 (0.2) | -0.136 (0.4) | 0.222 (0.2) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.96 (0.09) | 15.96 (0.09) | |||
| H magnitude | 15.35 (0.1) | 15.35 (0.1) | |||
| K magnitude | 15.30 (0.1) | 15.30 (0.1) | |||
| u magnitude | 22.41 (0.2) | ||||
| g magnitude | 21.22 (0.04) | ||||
| r magnitude | 19.77 (0.02) | ||||
| i magnitude | 18.35 (0.01) | ||||
| z magnitude | 17.59 (0.01) | ||||
| G magnitude | 18.83 (0.004) | 19.13 (0.003) | 19.11 (0.004) | ||
| BP magnitude | 18.75 (0.03) | 20.10 (0.1) | |||
| RP magnitude | 18.94 (0.07) | 17.85 (0.02) | |||
| Pan g magnitude | 18.30 | ||||
| Pan r magnitude | 19.80 (0.02) | ||||
| Pan i magnitude | 18.35 (0.01) | ||||
| Pan z magnitude | 17.70 (0.007) | ||||
| Pan y magnitude | 17.38 (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.