SDSS J120319.78+243955.7

All names: SDSS J120319.77+243955.7, J1203+2439, 12033+2439, SDSS J120319.78+243955.7, WIRED J120319.77+243955.7, Gaia DR2 4002914643768684288, GALEX J120319.7+243955, Gaia DR3 4002914643768684288, SDSS J120319.78+243955.70, PM J12033+2439, Gaia EDR3 4002914643768684288, SDSS J120319.76+243955.6

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 Limoges et al. 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 03 19.68 (0.06) 12 03 19.77 12 03 19.81 12 03 19.68 (0.08) 12 03 19.68 12 03 19.81 (0.06) 12 03 19.78
Declination 24 39 55.75 (0.05) 24 39 55.74 24 39 55.65 24 39 55.75 (0.06) 24 39 55.75 24 39 55.65 (0.05) 24 39 55.74
Spectral type DBZA DB DB DBAZ DBAZ DB
Effective temperature [K] 15300.0 14397.0 13959.0 (1027) 14141.0 (43) 13810.0 (255) 14471.0 (308) 14916.0 (79)
log(g) [cgs] 8.60 8.23 8.17 8.00 (0) 8.08 (0.1) 8.22 (0.02) 8.74 (0.05)
Mass [M] 0.969 0.728 0.6896 0.64 (0.09) 0.722 (0.02)
log(Luminosity) [L] -2.33
Cooling age [Gyr] 0.3290
log(H/He) -4.912 -5.2004 (0.07) -5.03 (0.1)
log(C/He)
log(Ca/He) -9.405 (0.2) <-8.86
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] 10.07 (0.07) 10.08 10.08 (0.1) 10.07 10.07 (0.07)
Distance [pc] 99.26 (0.7) 99.24 (1) 99.24 (1) 112.00 104.40 (3) 99.26 99.26 (0.7)
Composition He He
Proper motion (right ascension) [mas/yr] -114.5144704 (0.07) -114.521856 (0.2) -109.0 -114.514 (0.07)
Proper motion (declination) [mas/yr] 6.211699629 (0.05) 6.305499747 (0.1) 12.0 6.212 (0.06)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude 17.42 (0.1)
u magnitude 16.49 (0.007) 16.50 16.49 (0.007) 16.50 (0.02)
g magnitude 16.54 (0.004) 16.54 16.54 (0.004) 16.55 (0.02)
r magnitude 16.83 (0.005) 16.83 16.83 (0.005) 16.82 (0.02)
i magnitude 17.04 (0.006) 17.05 17.04 (0.006) 17.05 (0.02)
z magnitude 17.31 (0.01) 17.31 17.31 (0.01) 17.32 (0.02)
G magnitude 16.70 (0.006) 16.75 16.70 16.70 (0.003)
BP magnitude 16.63 (0.006)
RP magnitude 16.74 (0.008)
Pan g magnitude 16.60 (0.003)
Pan r magnitude 16.84 (0.002)
Pan i magnitude 17.07 (0.006)
Pan z magnitude 17.29 (0.005)
Pan y magnitude 17.44 (0.009)
E(B-V) 0.003

* 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.