SDSS J145437.06+445523.5

All names: SDSS J145437.05+445523.8, GALEX J145437.2+445523, SDSS J145437.06+445523.6, Gaia EDR3 1586623213348331776, Gaia DR2 1586623213348331776, SDSS J145437.06+445523.5, SDSS J145437.06+445523.59, Gaia DR3 1586623213348331776

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Koester & Kepler 2015 Simbad Vincent et al. 2023
Right ascension 14 54 37.05 (0.2) 14 54 37.06 14 54 37.05 (0.2) 14 54 37.06 (0.2)
Declination 44 55 23.64 (0.2) 44 55 23.81 44 55 23.65 (0.3) 44 55 23.93 (0.2)
Spectral type DB DB DB DB
Effective temperature [K] 12273.0 11698.0 11073.0 12574.0 (269) 11634.0 (134)
log(g) [cgs] 8.16 8.05 8.00 8.48 (0.2) 8.00 (0)
Mass [M] 0.685 0.613 0.584 0.885 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.4773
log(H/He) -5.614 <-5.59
log(C/He)
log(Ca/He) <-10.04
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 3.30 (0.2) 3.35 (0.3) 3.30 (0.2)
Distance [pc] 303.39 (21) 298.48 (27) 300.00 303.39 (21)
Composition He
Proper motion (right ascension) [mas/yr] -3.43043286 (0.2) -3.50995489 (0.4) -3.43 (0.2)
Proper motion (declination) [mas/yr] -17.71250876 (0.2) -17.73690787 (0.6) -17.713 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.39 (0.03) 19.39 (0.03) 19.39 (0.03)
g magnitude 19.26 (0.01) 19.25 (0.03) 19.25 (0.01)
r magnitude 19.46 (0.01) 19.46 (0.02) 19.45 (0.01)
i magnitude 19.65 (0.02) 19.66 (0.02) 19.66 (0.02)
z magnitude 19.85 (0.08) 19.83 (0.07) 19.84 (0.08)
G magnitude 19.36 (0.03) 19.41 19.36 (0.004)
BP magnitude 19.43 (0.03) 19.33
RP magnitude 19.46 (0.05) 19.30
Pan g magnitude 19.34 (0.01)
Pan r magnitude 19.47 (0.009)
Pan i magnitude 19.69 (0.007)
Pan z magnitude 19.81 (0.03)
Pan y magnitude 19.76 (0.1)
E(B-V) 0.021

* 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.