SDSS J143820.62+453855.7

All names: GALEX J143820.6+453855, Gaia EDR3 1493926102429601024, Gaia DR3 1493926102429601024, Gaia DR2 1493926102429601024, SDSS J143820.62+453855.6, SDSS J143820.62+453855.7

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 14 38 20.65 (0.2) 14 38 20.63 14 38 20.65 (0.2) 14 38 20.65 14 38 20.62 (0.2) 14 38 20.62
Declination 45 38 55.87 (0.2) 45 38 55.66 45 38 55.86 (0.2) 45 38 55.87 45 38 55.64 (0.2) 45 38 55.67
Spectral type DC DC DC: DC DC DA:
Effective temperature [K] 9918.0 9795.0 9421.0 (577) 10234.0 (133)
log(g) [cgs] 8.24 8.17 7.98 (0.1) 9.21 (0.6)
Mass [M] 0.752 0.683 0.568 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.8824 0.8442
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 4.15 (0.2) 4.36 (0.3) 4.15 4.15 (0.2)
Distance [pc] 240.85 (12) 229.45 (14) 240.85 240.85 (12)
Composition
Proper motion (right ascension) [mas/yr] 17.67085374 (0.2) 17.21916321 (0.4) 17.671 (0.2)
Proper motion (declination) [mas/yr] 14.46873842 (0.3) 14.53723652 (0.5) 14.469 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.50 (0.03) 19.50 (0.03) 19.54 (0.04)
g magnitude 19.36 (0.01) 19.36 (0.01) 19.41 (0.03)
r magnitude 19.43 (0.01) 19.43 (0.01) 19.46 (0.02)
i magnitude 19.59 (0.02) 19.59 (0.02) 19.58 (0.02)
z magnitude 19.72 (0.07) 19.72 (0.07) 19.76 (0.08)
G magnitude 19.40 (0.03) 19.46 19.40 19.40 (0.004)
BP magnitude 19.54 (0.03) 19.40
RP magnitude 19.36 (0.05) 19.26
Pan g magnitude 19.39 (0.01)
Pan r magnitude 19.44 (0.02)
Pan i magnitude 19.59 (0.01)
Pan z magnitude 19.77 (0.04)
Pan y magnitude 19.83 (0.2)
E(B-V) 0.020

* 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.