All names: uvby98 620169020, KK 789-20, Gaia EDR3 3584539233766055296, PG 1220-056, Gaia DR2 3584539233766055296, 2MASS J12225894-0553048, GALEX J122259.0-055301, Gaia DR3 3584539233766055296, PG1220-056, TIC 147696519
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 22 58.94 (0.04) | 12 22 58.97 | 12 22 58.95 (0.04) | ||
| Declination | -05 53 04.79 (0.03) | -05 53 04.93 | -05 53 04.86 (0.03) | ||
| Spectral type | He-sdO | sdO3VIIeHe40 | |||
| 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] | 0.59 (0.05) | 0.54 (0.08) | 0.59 (0.05) | |
| Distance | [pc] | 1681.24 (130) | 1852.54 (262) | 1681.24 (130) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -10.331 (0.06) | -10.383 (0.2) | -10.331 (0.06) | |
| Proper motion (declination) | [mas/yr] | 4.455 (0.04) | 4.326 (0.09) | 4.455 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.73 | ||||
| V magnitude | 14.76 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.41 (0.06) | 15.41 (0.06) | |||
| H magnitude | 15.49 (0.1) | 15.49 (0.1) | |||
| K magnitude | 15.37 (0.2) | 15.37 (0.2) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 14.71 (0.003) | 14.72 (0.0006) | 14.71 (0.003) | ||
| BP magnitude | 14.54 (0.004) | 14.47 (0.008) | |||
| RP magnitude | 15.04 (0.004) | 15.04 (0.002) | |||
| Pan g magnitude | 14.55 (0.003) | ||||
| Pan r magnitude | 14.99 (0.003) | ||||
| Pan i magnitude | 15.37 (0.003) | ||||
| Pan z magnitude | 15.65 (0.004) | ||||
| Pan y magnitude | 15.84 (0.006) | ||||
| E(B-V) | 0.027 | ||||
* 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.