SDSS J154552.42+440840.5

All names: Gaia DR2 1396616132212298240, Gaia EDR3 1396616132212298240, SDSS J154552.42+440840.5, GALEX J154552.4+440841, SDSS J154552.41+440840.6, SDSS J154552.42+440840.52, Gaia DR3 1396616132212298240

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 MWDD H Gaia DR2 Stilism Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 15 45 52.43 (0.2) 15 45 52.42 15 45 52.43 (0.2) 15 45 52.42 (0.2)
Declination 44 08 40.47 (0.2) 44 08 40.67 44 08 40.48 (0.3) 44 08 40.70 (0.2)
Spectral type DA DA DA DA
Effective temperature [K] 22640.0 26431.0 (295)
log(g) [cgs] 7.80 8.10 (0.04)
Mass [M] 0.526 0.687 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0254
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] 1.58 (0.2) 1.55 (0.3) 1.58 (0.2)
Distance [pc] 633.31 (84) 646.87 (113) 633.31 (84)
Composition H
Proper motion (right ascension) [mas/yr] 5.570988072 (0.2) 6.115808236 (0.5) 5.571 (0.2)
Proper motion (declination) [mas/yr] -14.46747475 (0.3) -14.68042769 (0.7) -14.467 (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 19.01 (0.02) 19.00 (0.03) 19.01 (0.02)
g magnitude 19.10 (0.01) 19.13 (0.02) 19.10 (0.01)
r magnitude 19.48 (0.01) 19.52 (0.02) 19.48 (0.01)
i magnitude 19.79 (0.02) 19.82 (0.03) 19.79 (0.02)
z magnitude 20.35 (0.1) 20.31 (0.1) 20.35 (0.1)
G magnitude 19.32 (0.03) 19.36 19.32 (0.004)
BP magnitude 19.25 (0.03) 19.23
RP magnitude 19.63 (0.07) 19.49
Pan g magnitude 19.13 (0.007)
Pan r magnitude 19.51 (0.02)
Pan i magnitude 19.88 (0.02)
Pan z magnitude 20.09 (0.04)
Pan y magnitude 19.97 (0.1)
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.