CD-40 13747

All names: TYC 7952-2164-1, Gaia DR2 6692773045444107008, TIC 355058528, Gaia DR1 6692773045444107008, GALEX J201504.8-400543, GSC 07952-02164, EC20117-4014, 2MASS J20150478-4005441, CD-40 13747, V* V4640 Sgr, Gaia DR3 6692773045444107008, [VKN2011] J201504.8-400544, EC 20117-4014

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 20 15 04.78 20 15 04.79 (0.02)
Declination -40 05 44.23 -40 05 44.11 (0.02)
Spectral type sdBV+F sdO
Effective temperature [K] 34800.0
log(g) [cgs] 5.87
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 1.70 (0.04) 1.75 (0.03)
Distance [pc] 586.89 (13) 572.77 (8)
Composition
Proper motion (right ascension) [mas/yr] -20.68 (0.06) -21.111 (0.02)
Proper motion (declination) [mas/yr] -12.875 (0.05) -13.11 (0.02)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 12.09 (0.1)
V magnitude 11.82 (0.2)
R magnitude
I magnitude
J magnitude 11.85 (0.03) 11.85 (0.03)
H magnitude 11.68 (0.03) 11.68 (0.03)
K magnitude 11.66 (0.03) 11.66 (0.03)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 12.36 (0.0004) 12.35 (0.003)
BP magnitude 12.41 (0.007)
RP magnitude 12.16 (0.0007)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.035

* 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.