EC 20307-2901

All names: Gaia EDR3 6798537890717021824, Gaia DR2 6798490920954669312, 2MASS J20334713-2851114, GALEX J203347.1-285111, Gaia DR3 6798490920954669312, TIC 269771440, UCAC4 306-279651, EC 20307-2901, EC20307-2901

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 20 33 39.47 (0.5) 20 33 47.07 20 33 47.14 (0.05)
Declination -28 50 52.60 (0.4) -28 51 10.94 -28 51 11.63 (0.03)
Spectral type sdB 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] 1.37 (0.6) 0.04 (0.08) 0.14 (0.05)
Distance [pc] 730.73 (337) 25000.00 (51562) 6958.94 (2605)
Composition
Proper motion (right ascension) [mas/yr] 2.739 (0.6) -0.505 (0.1) -0.67 (0.06)
Proper motion (declination) [mas/yr] -5.59 (0.5) -0.145 (0.09) -0.276 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.23
V magnitude 16.32
R magnitude
I magnitude
J magnitude 16.50 (0.1) 16.50 (0.1)
H magnitude 16.73
K magnitude 15.09
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 20.19 (0.005) 16.32 (0.001) 16.30 (0.003)
BP magnitude 20.43 (0.07) 16.22 (0.004)
RP magnitude 19.68 (0.05) 16.43 (0.004)
Pan g magnitude 16.20 (0.005)
Pan r magnitude 16.48 (0.005)
Pan i magnitude 16.75 (0.002)
Pan z magnitude 16.98 (0.006)
Pan y magnitude 17.09 (0.01)
E(B-V) 0.050

* 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.