SDSS J145437.98+184725.6

All names: GALEX J145438.0+184725, Gaia EDR3 1236858497150236288, [BGK2006] J145437.98+184725.6, SDSS J145437.98+184725.6, SDSS J145437.97+184725.5, Gaia DR2 1236858497150236288, Gaia DR3 1236858497150236288, SDSS J145437.97+184725.51, SDSS J145437.97+184725.6

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 MWDD H Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 14 54 37.96 (0.05) 14 54 37.98 14 54 37.96 (0.08) 14 54 37.96 14 54 37.99 (0.05)
Declination 18 47 25.50 (0.05) 18 47 25.62 18 47 25.51 (0.08) 18 47 25.50 18 47 25.74 (0.05)
Spectral type DA DA DA DA DA
Effective temperature [K] 14977.0 17760.0 (60) 16578.0 (375)
log(g) [cgs] 7.87 8.10 (0.01) 7.97 (0.02)
Mass [M] 0.538 0.6709999999999999 (0.005) 0.601 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.1595
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 7.10 (0.07) 7.09 (0.1) 7.10 7.10 (0.07)
Distance [pc] 140.91 (1) 140.97 (2) 140.91 140.91 (1)
Composition H
Proper motion (right ascension) [mas/yr] -23.13738088 (0.07) -23.03353131 (0.2) -23.137 (0.07)
Proper motion (declination) [mas/yr] -15.27064899 (0.07) -15.40419451 (0.2) -15.271 (0.07)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 16.89 (0.008) 16.86 (0.03) 16.89 (0.008)
g magnitude 16.68 (0.004) 16.69 (0.02) 16.68 (0.004)
r magnitude 17.01 (0.005) 17.01 (0.02) 17.02 (0.005)
i magnitude 17.29 (0.006) 17.31 (0.02) 17.29 (0.006)
z magnitude 17.54 (0.01) 17.54 (0.02) 17.54 (0.01)
G magnitude 16.86 (0.005) 16.88 16.86 16.86 (0.003)
BP magnitude 16.82 (0.005) 16.80
RP magnitude 17.00 (0.009) 17.01
Pan g magnitude 16.73 (0.004)
Pan r magnitude 17.02 (0.004)
Pan i magnitude 17.29 (0.003)
Pan z magnitude 17.53 (0.005)
Pan y magnitude 17.69 (0.02)
E(B-V) 0.022

* 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.