All names: SDSS J122108.33+155005.6, WISEA J122108.32+155005.4, LBQS1218+1606, 2MASS J12210833+1550055, Gaia EDR3 3945498180926839552, Gaia DR3 3945498180926839680, SDSS J122108.32+155005.7, Gaia DR2 3945498176630632320, TIC 357400461, WISE J122108.32+155005.5
| 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.