All names: Gaia DR2 6779486927619956992, 2MASS J20423422-3517308, Gaia DR3 6779486927619956992, GALEXJ20425-3517, TIC 441401311, GALEX J204234.1-351730, BPS CS 30314-0163, UCAC4 274-198502, WISE J204234.21-351730.8, EC 20394-3528
Parameter | Unit | Geier 2020 | Stilism | Simbad |
---|---|---|---|---|
Right ascension | 20 42 34.15 | 20 42 34.22 (0.02) | ||
Declination | -35 17 30.04 | -35 17 30.82 (0.01) | ||
Spectral type | sdB+MS | 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] | 0.89 (0.04) | 0.84 (0.03) | |
Distance | [pc] | 1125.62 (48) | 1187.51 (35) | |
Composition | ||||
Proper motion (right ascension) | [mas/yr] | -1.543 (0.06) | -1.618 (0.02) | |
Proper motion (declination) | [mas/yr] | -4.449 (0.03) | -4.204 (0.02) | |
Variability | ||||
Magnetic | ||||
Bd | [MG] | |||
Infrared excess (disk) | ||||
Binarity | ||||
B magnitude | 14.12 (0.03) | |||
V magnitude | 13.90 (0.01) | |||
R magnitude | 13.97 (0.1) | |||
I magnitude | ||||
J magnitude | 13.06 (0.02) | 13.06 (0.02) | ||
H magnitude | 12.83 (0.02) | 12.83 (0.02) | ||
K magnitude | 12.78 (0.03) | 12.78 (0.03) | ||
u magnitude | ||||
g magnitude | 13.94 (0.01) | |||
r magnitude | 13.81 (0.01) | |||
i magnitude | 13.81 (0.01) | |||
z magnitude | ||||
G magnitude | 13.74 (0.0002) | 13.72 (0.003) | ||
BP magnitude | 13.86 (0.002) | |||
RP magnitude | 13.46 (0.0008) | |||
Pan g magnitude | ||||
Pan r magnitude | ||||
Pan i magnitude | ||||
Pan z magnitude | ||||
Pan y magnitude | ||||
E(B-V) | 0.040 |
* 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.