EC 20481-5518

All names: 2MASS J20515355-5507343, Gaia DR3 6470065629505057152, WISE J205153.55-550735.5, GALEX J205153.4-550734, UCAC4 175-215221, EC20481-5518, EC 20481-5518, TIC 354134858, Gaia DR2 6470065629505057152, Gaia EDR3 6470065625208398208

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 20 51 53.48 (0.3) 20 51 53.52 20 51 53.53 (0.03)
Declination -55 08 18.73 (0.3) -55 07 34.64 -55 07 34.40 (0.03)
Spectral type He-sdO sdO7.5VIIHe39
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] 0.82 (0.4) 0.31 (0.05) 0.33 (0.04)
Distance [pc] 1214.33 (627) 3261.58 (584) 3046.92 (396)
Composition
Proper motion (right ascension) [mas/yr] 6.729 (0.5) 7.634 (0.08) 7.6 (0.04)
Proper motion (declination) [mas/yr] -2.544 (0.4) -3.666 (0.08) -3.623 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.38
V magnitude 15.60
R magnitude 16.02 (0.2)
I magnitude
J magnitude 16.21 (0.09) 16.21 (0.09)
H magnitude 15.95 (0.2) 15.95 (0.2)
K magnitude 15.83
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 19.84 (0.004) 15.63 (0.0007) 15.62 (0.003)
BP magnitude 19.86 (0.05) 15.40 (0.009)
RP magnitude 20.04 (0.08) 15.91 (0.003)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.022

* 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.