SDSS J151800.52+370303.3

All names: Gaia DR2 1387467022941713920, GALEX J151800.6+370302, Gaia EDR3 1387467022941713920, SDSS J151800.52+370303.40, SDSS J151800.52+370303.3, SDSS J151800.52+370303.4, Gaia DR3 1387467022941713920, LAMOST J151800.52+370303.4

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 18 00.54 (0.05) 15 18 00.52 15 18 00.54 (0.07) 15 18 00.54 15 18 00.52 (0.05) 15 18 00.52
Declination 37 03 03.40 (0.07) 37 03 03.36 37 03 03.40 (0.1) 37 03 03.40 37 03 03.33 (0.07) 37 03 03.41
Spectral type DB DB DB DBA DB
Effective temperature [K] 12908.0 12683.0 12151.0 12829.0 (62) 12992.0 (282) 13622.0 (125)
log(g) [cgs] 7.97 8.02 7.96 8.00 (0) 8.02 (0.03) 8.60 (0.09)
Mass [M] 0.568 0.595 0.564 0.596 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.3514
log(H/He) -5.625 -5.45 (0.2)
log(C/He)
log(Ca/He) <-9.65
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] 6.60 (0.08) 6.76 (0.1) 6.60 6.60 (0.08)
Distance [pc] 151.53 (2) 147.90 (2) 151.00 151.53 151.53 (2)
Composition He
Proper motion (right ascension) [mas/yr] 16.29667376 (0.06) 16.18691262 (0.1) 16.297 (0.06)
Proper motion (declination) [mas/yr] 4.653494118 (0.1) 5.001633512 (0.2) 4.653 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.45 (0.009) 17.45 (0.009) 17.45 (0.02)
g magnitude 17.43 (0.005) 17.43 (0.005) 17.43 (0.01)
r magnitude 17.67 (0.006) 17.67 (0.006) 17.72 (0.02)
i magnitude 17.89 (0.007) 17.89 (0.007) 17.86 (0.02)
z magnitude 18.09 (0.02) 18.09 (0.02) 18.12 (0.02)
G magnitude 17.54 (0.006) 17.58 17.54 17.54 (0.003)
BP magnitude 17.53 (0.006) 17.48
RP magnitude 17.58 (0.01) 17.57
Pan g magnitude 17.50 (0.005)
Pan r magnitude 17.70 (0.003)
Pan i magnitude 17.90 (0.004)
Pan z magnitude 18.09 (0.01)
Pan y magnitude 18.21 (0.02)
E(B-V) 0.019

* 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.