All names: USNO-A2.0 0300-37808405, UCAC2 7915729, GALEX J225444.1-551505, Gaia DR3 6506045390880965504, GALEXJ225444.11-551505.64, UCAC4 174-209534, Gaia EDR3 6506045390880965504, TIC 220488137, 2MASS J22544448-5515067, TYC 8827-750-1, Gaia DR2 6506045390880965504
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 54 44.56 (0.02) | 22 54 44.11 | 22 54 44.51 (0.02) | ||
| Declination | -55 15 06.62 (0.03) | -55 15 05.64 | -55 15 06.71 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 31070.0 (190) | |||
| log(g) | [cgs] | 5.80 (0.06) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 3.38 (0.04) | 3.43 (0.06) | 3.38 (0.04) | |
| Distance | [pc] | 295.53 (3) | 291.89 (5) | 295.53 (3) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 30.242 (0.03) | 30.311 (0.09) | 30.242 (0.03) | |
| Proper motion (declination) | [mas/yr] | 5.815 (0.04) | 5.91 (0.1) | 5.815 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 11.90 (0.07) | ||||
| V magnitude | 12.12 (0.1) | ||||
| R magnitude | 12.54 (0.05) | ||||
| I magnitude | |||||
| J magnitude | 12.82 (0.02) | 12.82 (0.02) | |||
| H magnitude | 12.98 (0.03) | 12.98 (0.03) | |||
| K magnitude | 13.07 (0.03) | 13.07 (0.03) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 12.14 (0.003) | 12.17 (0.0006) | 12.14 (0.003) | ||
| BP magnitude | 11.99 (0.003) | 11.93 (0.006) | |||
| RP magnitude | 12.45 (0.004) | 12.45 (0.002) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.011 | ||||
* 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.