SDSS J161806.86+365048.7

All names: Gaia EDR3 1330380688465183232, Gaia DR2 1330380688465183232, SDSS J161806.86+365048.70, SDSS J161806.86+365048.7, SDSS J161806.85+365048.7, GALEX J161806.8+365049, Gaia DR3 1330380688465183232, WD 1616+369

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 18 06.86 (0.3) 16 18 06.86 16 18 06.86 (0.3) 16 18 06.86 (0.3) 16 18 06.86 16 18 06.58 16 18 06.86
Declination 36 50 48.69 (0.3) 36 50 48.73 36 50 48.70 (0.4) 36 50 48.74 (0.3) 36 50 48.75 36 50 45.60 36 50 48.74
Spectral type DB DB DB DB DB DB
Effective temperature [K] 19881.0 17216.0 15877.0 18667.0 (588) 18841.0 (803)
log(g) [cgs] 8.77 7.62 7.46 8.29 (0.2) 8.31 (0.2)
Mass [M] 1.077 0.407 0.342 0.78 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.0855
log(H/He) -3.99
log(C/He)
log(Ca/He)
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] 1.36 (0.3) 1.23 (0.4) 1.36 (0.3)
Distance [pc] 733.33 (172) 814.78 (279) 733.30 (172)
Composition He
Proper motion (right ascension) [mas/yr] -0.513961706 (0.4) 0.000930137 (0.7) -0.514 (0.4) -0.8
Proper motion (declination) [mas/yr] -2.72140391 (0.4) -2.640454404 (0.8) -2.721 (0.4) -4.4
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.74 (0.03) 19.74 (0.03) 19.71 (0.04) 19.71 19.73 (0.04)
g magnitude 19.77 (0.01) 19.77 (0.01) 19.80 (0.02) 19.79 19.79 (0.02)
r magnitude 20.11 (0.02) 20.11 (0.02) 20.16 (0.03) 20.15 20.16 (0.03)
i magnitude 20.39 (0.03) 20.39 (0.03) 20.41 (0.04) 20.40 20.41 (0.04)
z magnitude 20.60 (0.1) 20.60 (0.1) 20.59 (0.2) 20.58 20.58 (0.1)
G magnitude 19.96 (0.04) 20.01 19.96 (0.005)
BP magnitude 19.86 (0.04) 19.75
RP magnitude 19.97 (0.1) 20.04
Pan g magnitude 19.82 (0.01)
Pan r magnitude 20.14 (0.02)
Pan i magnitude 20.42 (0.01)
Pan z magnitude 20.73 (0.05)
Pan y magnitude
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.