EC 20369-1804

All names: EC 20369-1804, UCAC2 25219714, GALEX J203946.3-175403, Gaia DR2 6861501321001347328, SBC9 3344, TIC 8970997, 2MASS J20394638-1754049, UCAC3 145-440245, Gaia DR3 6861501321001347328, GALEXJ20397-1754, UCAC4 361-199900

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 20 39 46.30 20 39 46.38 (0.03)
Declination -17 54 03.79 -17 54 04.93 (0.03)
Spectral type sdB+WD 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] 1.10 (0.08) 1.15 (0.04)
Distance [pc] 908.27 (63) 872.45 (31)
Composition
Proper motion (right ascension) [mas/yr] 8.519 (0.1) 8.6 (0.04)
Proper motion (declination) [mas/yr] -4.5 (0.07) -4.327 (0.03)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 13.08
V magnitude 13.35
R magnitude 13.69 (0.1)
I magnitude
J magnitude 13.94 (0.02) 13.94 (0.02)
H magnitude 14.06 (0.04) 14.06 (0.04)
K magnitude 14.13 (0.06) 14.13 (0.06)
u magnitude 12.81 (0.003)
g magnitude 13.35 (0.008)
r magnitude 13.62 (0.008)
i magnitude 13.94 (0.003)
z magnitude 14.17 (0.004)
G magnitude 13.29 (0.0006) 13.28 (0.003)
BP magnitude 13.06 (0.008)
RP magnitude 13.57 (0.001)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude 17.82 (0.2)
E(B-V) 0.047

* Constant surface field

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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.