SDSS J082020.87+092021.9

All names: GALEX J082020.9+092022, SDSS J082020.87+092021.9, Gaia DR3 600231884459388032, Gaia EDR3 600231884459388032, Gaia DR2 600231884459388032, SDSS J082020.87+092021.8

Parameter Unit Gaia EDR3 Stilism Vincent et al. 2024 Simbad
Right ascension 08 20 20.87 (0.1) 08 20 20.87 08 20 20.88 (0.1)
Declination 09 20 21.71 (0.1) 09 20 21.71 09 20 21.97 (0.1)
Spectral type DB DB
Effective temperature [K] 15911.0 (1266)
log(g) [cgs] 8.04 (0.1)
Mass [M☉] 0.618 (0.09)
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 3.73 (0.2) 3.73 3.73 (0.2)
Distance [pc] 268.16 (13) 268.16 268.16 (13)
Composition
Proper motion (right ascension) [mas/yr] -7.481 (0.2) -7.481 (0.2)
Proper motion (declination) [mas/yr] -16.145 (0.1) -16.145 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.11 (0.01)
g magnitude 18.21 (0.007)
r magnitude 18.49 (0.008)
i magnitude 18.74 (0.01)
z magnitude 19.04 (0.04)
G magnitude 18.36 (0.003) 18.36 18.36 (0.003)
BP magnitude 18.29 (0.02)
RP magnitude 18.46 (0.04)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.015

* 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.