All names: 2MASS J18384555-5409341, UCAC4 180-215904, GALEX J183845.6-540935, TIC 120122222, Gaia EDR3 6651115715260198656, UCAC2 8411470, Gaia DR2 6651115985843036800, Gaia DR3 6651115985843036800, GALEXJ18387-5409, DENIS J183845.5-540934
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 38 48.87 (0.8) | 18 38 45.62 | 18 38 45.57 (0.03) | ||
| Declination | -54 11 20.17 (0.9) | -54 09 35.02 | -54 09 34.25 (0.03) | ||
| Spectral type | He-sdOB | sdB0VIIHe39 | |||
| 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] | 1.24 (1) | 1.30 (0.05) | 1.23 (0.04) | |
| Distance | [pc] | 804.25 (678) | 770.12 (32) | 816.19 (29) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -6.06 (0.9) | 1.957 (0.07) | 1.933 (0.04) | |
| Proper motion (declination) | [mas/yr] | -7.081 (0.8) | -11.97 (0.08) | -11.759 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.48 (0.03) | ||||
| V magnitude | 13.57 (0.05) | ||||
| R magnitude | 14.05 (0.2) | ||||
| I magnitude | 13.83 (0.03) | ||||
| J magnitude | 14.15 (0.06) | 14.15 (0.06) | |||
| H magnitude | 14.30 (0.06) | 14.30 (0.06) | |||
| K magnitude | 14.46 (0.09) | 14.46 (0.09) | |||
| u magnitude | |||||
| g magnitude | 13.42 (0.02) | ||||
| r magnitude | 13.77 (0.03) | ||||
| i magnitude | 14.06 (0.1) | ||||
| z magnitude | |||||
| G magnitude | 20.47 (0.009) | 13.63 (0.0008) | 13.61 (0.003) | ||
| BP magnitude | 20.79 (0.1) | 13.41 (0.01) | |||
| RP magnitude | 19.91 (0.09) | 13.85 (0.002) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.065 | ||||
* 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.