SDSS J151818.66+294217.9

All names: Gaia EDR3 1275292956890724992, SDSS J151818.65+294217.9, Gaia DR2 1275292956890724992, GALEX J151818.6+294218, Gaia DR3 1275292956890724992, SDSS J151818.66+294217.9

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 18 18.65 (0.1) 15 18 18.65 15 18 18.65 (0.1) 15 18 18.65 15 18 18.66 (0.1) 15 18 18.66
Declination 29 42 17.89 (0.2) 29 42 17.91 29 42 17.89 (0.2) 29 42 17.89 29 42 17.91 (0.2) 29 42 17.88
Spectral type DA DAH: DA DAH DAH: DA
Effective temperature [K] 6442.1 (51) 6377.0 6551.0 (137) 6616.0 (82)
log(g) [cgs] 7.25 (0.6) 7.21 7.38 (0.07) 6.97 (0.3)
Mass [M] 0.256373376291032 (0.03) 0.243 0.297 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.8763
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] 5.59 (0.2) 5.31 (0.3) 5.59 5.59 (0.2)
Distance [pc] 178.95 (7) 188.46 (10) 178.95 178.95 (7)
Composition H
Proper motion (right ascension) [mas/yr] -8.377208092 (0.2) -8.661560342 (0.3) -8.377 (0.2)
Proper motion (declination) [mas/yr] -1.609796647 (0.2) -1.771152879 (0.4) -1.61 (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 20.06 (0.04) 20.06 (0.04) 20.03 (0.04)
g magnitude 19.43 (0.01) 19.43 (0.01) 19.47 (0.02)
r magnitude 19.18 (0.01) 19.18 (0.01) 19.18 (0.02)
i magnitude 19.08 (0.01) 19.08 (0.01) 19.08 (0.02)
z magnitude 19.02 (0.05) 19.02 (0.05) 19.06 (0.05)
G magnitude 19.16 (0.02) 19.19 19.16 19.16 (0.003)
BP magnitude 19.44 (0.02) 19.41
RP magnitude 18.79 (0.03) 18.75
Pan g magnitude 19.41 (0.02)
Pan r magnitude 19.16 (0.009)
Pan i magnitude 19.10 (0.01)
Pan z magnitude 19.10 (0.02)
Pan y magnitude 19.06 (0.03)
E(B-V) 0.028

* 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.