SDSS J144055.25+025719.7

All names: USNO-A2.0 0900-07758362, GALEX J144055.2+025720, SDSS J144055.25+025719.7, Gaia EDR3 3655746248185163136, Gaia DR2 3655746248185163136, Gaia DR3 3655746248185163136

Parameter Unit Gaia EDR3 Stilism Vincent et al. 2024 Simbad
Right ascension 14 40 55.23 (0.1) 14 40 55.23 14 40 55.25 (0.1)
Declination 02 57 19.87 (0.09) 02 57 19.87 02 57 19.71 (0.09)
Spectral type DB DBA
Effective temperature [K] 13546.0 (482)
log(g) [cgs] 7.58 (0.06)
Mass [M☉] 0.378 (0.03)
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 4.01 (0.1) 4.01 4.01 (0.1)
Distance [pc] 249.36 (7) 249.36 249.36 (7)
Composition
Proper motion (right ascension) [mas/yr] -23.352 (0.1) -23.352 (0.1)
Proper motion (declination) [mas/yr] 9.922 (0.1) 9.922 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.00 (0.3)
V magnitude
R magnitude 17.60 (0.3)
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.81 (0.01)
g magnitude 17.82 (0.006)
r magnitude 18.06 (0.007)
i magnitude 18.24 (0.01)
z magnitude 18.57 (0.04)
G magnitude 17.91 (0.003) 17.91 17.91 (0.003)
BP magnitude 17.93 (0.01)
RP magnitude 18.00 (0.02)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.030

* 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.