SDSS J083930.08+261804.9

All names: Gaia DR3 702830819140107904, SDSS J083930.08+261804.90, J0839+2618, Gaia EDR3 702830819140107904, SDSS J083930.08+261804.9, Gaia DR2 702830819140107904, GALEX J083930.0+261806, SDSS J083930.08+261804.8

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 39 30.08 (0.2) 08 39 30.08 08 39 30.09 08 39 30.08 (0.3) 08 39 30.08 08 39 30.09 (0.2) 08 39 30.08
Declination 26 18 04.85 (0.2) 26 18 04.89 26 18 04.93 26 18 04.85 (0.2) 26 18 04.85 26 18 04.92 (0.2) 26 18 04.89
Spectral type DBZA DB DBAZ DBAZ: DB
Effective temperature [K] 17496.0 14511.0 14581.0 (1486) 18195.0 (126) 14824.0 (1261) 18523.0 (361)
log(g) [cgs] 8.17 8.05 8.09 7.87 (0.07) 7.92 (0.1) 8.24 (0.09)
Mass [M] 0.697 0.618 0.64 0.543 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.2520
log(H/He) -3.462 -3.9824 (0.3) -3.14 (0.2)
log(C/He)
log(Ca/He) -8.2943 (0.7) <-5.2
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] 2.81 (0.3) 3.17 3.17 (0.4) 2.81 2.81 (0.3)
Distance [pc] 355.44 (32) 315.76 (39) 315.76 (39) 446.00 355.44 355.44 (32)
Composition He
Proper motion (right ascension) [mas/yr] -3.86776116 (0.2) -3.445584339 (0.6) -3.868 (0.2)
Proper motion (declination) [mas/yr] -4.260271654 (0.2) -4.888130778 (0.4) -4.26 (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 18.79 (0.02) 18.79 (0.02) 18.75 (0.02)
g magnitude 18.85 (0.009) 18.85 (0.009) 18.88 (0.01)
r magnitude 19.13 (0.01) 19.13 (0.01) 19.16 (0.02)
i magnitude 19.37 (0.02) 19.37 (0.02) 19.40 (0.02)
z magnitude 19.63 (0.06) 19.64 (0.06) 19.76 (0.06)
G magnitude 18.98 (0.02) 19.02 18.98 18.98 (0.004)
BP magnitude 18.90 (0.02) 18.91
RP magnitude 19.13 (0.04) 19.04
Pan g magnitude 18.88 (0.009)
Pan r magnitude 19.13 (0.005)
Pan i magnitude 19.41 (0.008)
Pan z magnitude 19.65 (0.03)
Pan y magnitude 19.69 (0.04)
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.