All names: 2MASS J18210972+3446443, Gaia DR3 4593604931965047168, FBS B 611, GALEX J182109.8+344644, TIC 23397363, GALEXJ18211+3446, Gaia DR2 4593604931965047168, FBS 1819+348
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 21 09.84 | 18 21 09.72 (0.02) | ||
| Declination | 34 46 44.52 | 34 46 44.27 (0.03) | ||
| Spectral type | sdOB | sdA | ||
| 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] | 0.61 (0.04) | 0.64 (0.03) | |
| Distance | [pc] | 1643.39 (104) | 1566.17 (71) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.455 (0.07) | 3.485 (0.03) | |
| Proper motion (declination) | [mas/yr] | -0.543 (0.07) | -0.413 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.29 (0.04) | 15.29 (0.04) | ||
| H magnitude | 15.50 (0.08) | 15.50 (0.08) | ||
| K magnitude | 15.47 (0.1) | 15.47 (0.1) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 14.59 (0.0007) | 14.58 (0.003) | ||
| BP magnitude | 14.36 (0.007) | |||
| RP magnitude | 14.88 (0.002) | |||
| Pan g magnitude | 14.40 (0.002) | |||
| Pan r magnitude | 14.86 (0.001) | |||
| Pan i magnitude | 15.22 (0.002) | |||
| Pan z magnitude | 15.50 (0.003) | |||
| Pan y magnitude | 15.68 (0.006) | |||
| E(B-V) | 0.046 | |||
* 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.