SDSS J103923.87+264822.9

All names: SDSS J103923.87+264822.6, SDSS J103923.87+264822.8, SDSS J103923.87+264822.90, Gaia DR3 725041881733642112, GALEX J103923.8+264823, SDSS J103923.87+264822.9, Gaia EDR3 725041881733642112, J1039+2648, Gaia DR2 725041881733642112

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 10 39 23.87 (0.1) 10 39 23.87 10 39 23.88 10 39 23.87 (0.2) 10 39 23.87 10 39 23.88 (0.1) 10 39 23.87
Declination 26 48 22.42 (0.2) 26 48 22.81 26 48 22.90 26 48 22.43 (0.3) 26 48 22.42 26 48 22.88 (0.2) 26 48 22.87
Spectral type DBZA DB DBAZ DBAZ DB
Effective temperature [K] 14959.0 13774.0 13421.0 (637) 13955.0 (49) 13456.0 (506) 14529.0 (142)
log(g) [cgs] 8.36 8.03 7.97 8.00 (0) 8.04 (0.05) 8.68 (0.09)
Mass [M] 0.817 0.605 0.5716 0.612 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.2680
log(H/He) -5.285 -5.4087 (0.1) -5.27 (0.2)
log(C/He)
log(Ca/He) -9.758 (0.3) <-8.79
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] 5.59 (0.1) 5.44 5.44 (0.3) 5.59 5.59 (0.1)
Distance [pc] 178.92 (5) 183.84 (9) 183.84 (9) 186.00 178.92 178.92 (5)
Composition He
Proper motion (right ascension) [mas/yr] -7.950561414 (0.1) -7.30888244 (0.4) -7.951 (0.1)
Proper motion (declination) [mas/yr] -28.98109038 (0.2) -30.12528276 (0.6) -28.981 (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 17.69 (0.01) 17.69 (0.01) 17.67 (0.03)
g magnitude 17.74 (0.005) 17.74 (0.005) 17.77 (0.02)
r magnitude 18.01 (0.007) 18.01 (0.007) 18.01 (0.01)
i magnitude 18.23 (0.009) 18.23 (0.009) 18.23 (0.01)
z magnitude 18.43 (0.03) 18.43 (0.03) 18.42 (0.03)
G magnitude 17.85 (0.01) 17.88 17.85 17.85 (0.003)
BP magnitude 17.82 (0.01) 17.80
RP magnitude 17.91 (0.02) 17.93
Pan g magnitude 17.79 (0.008)
Pan r magnitude 18.00 (0.004)
Pan i magnitude 18.24 (0.005)
Pan z magnitude 18.45 (0.01)
Pan y magnitude 18.59 (0.02)
E(B-V) 0.013

* 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.