EC 20577-5504

All names: Gaia DR2 6458088786782625024, UCAC4 176-219918, EC20577-5504, 2MASS J21012846-5453115, Gaia EDR3 6458088786782625024, Gaia DR3 6458088786782625024, EC 20577-5504, GALEX J210128.4-545309, TIC 219304041

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 21 01 28.47 (0.05) 21 01 28.44 21 01 28.49 (0.05)
Declination -54 53 11.70 (0.04) -54 53 11.26 -54 53 11.55 (0.04)
Spectral type He-sdO sdBOHe
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] 0.52 (0.06) 0.36 (0.1) 0.52 (0.06)
Distance [pc] 1906.94 (228) 2813.73 (878) 1906.94 (228)
Composition
Proper motion (right ascension) [mas/yr] -10.51 (0.06) -10.428 (0.2) -10.51 (0.06)
Proper motion (declination) [mas/yr] -9.444 (0.05) -9.173 (0.2) -9.444 (0.05)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.59
V magnitude 15.86
R magnitude 16.16 (0.6)
I magnitude
J magnitude 16.67 (0.1) 16.67 (0.1)
H magnitude 17.48
K magnitude 16.78
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.82 (0.003) 15.84 (0.003) 15.82 (0.003)
BP magnitude 15.66 (0.005) 15.60 (0.01)
RP magnitude 16.14 (0.007) 16.12 (0.007)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.021

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit




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.