SDSS J144205.41+122926.7

All names: SDSS J144205.39+122926.8, SDSS J144205.41+122926.80, SDSS J144205.41+122926.7, Gaia EDR3 1178750682011354112, Gaia DR2 1178750682011354112, GALEX J144205.5+122927, Gaia DR3 1178750682011354112, LAMOST J144205.40+122926.8, SDSS J144205.41+122926.8

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 14 42 05.37 (0.1) 14 42 05.41 14 42 05.37 (0.2) 14 42 05.37 14 42 05.41 (0.1) 14 42 05.41
Declination 12 29 26.89 (0.1) 12 29 26.77 12 29 26.88 (0.2) 12 29 26.89 12 29 26.67 (0.1) 12 29 26.80
Spectral type DB DB DB DB DB
Effective temperature [K] 32904.0 (836) 32824.0 33645.0 31591.0 (409) 40171.0 (4746) 31304.0 (506)
log(g) [cgs] 7.73 (0.09) 7.79 7.99 7.65 (0.05) 8.19 (0.1) 7.80 (0.05)
Mass [M] 0.49 (0.04) 0.514 0.618 0.741 (0.1) 0.519 (0.02)
log(Luminosity) [L] -0.57 (0.07)
Cooling age [Gyr] 0.0065 (0.001)
log(H/He) <-3.72 <-2.88
log(C/He)
log(Ca/He) <-4.0
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] 2.37 (0.2) 2.34 (0.2) 2.37 2.37 (0.2)
Distance [pc] 421.50 (30) 426.60 (39) 527.00 421.50 421.50 (30)
Composition He
Proper motion (right ascension) [mas/yr] -36.41223844 (0.2) -36.98340213 (0.4) -36.412 (0.2)
Proper motion (declination) [mas/yr] 13.85218933 (0.2) 14.43167502 (0.4) 13.852 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 19.00 (0.1)
H magnitude 19.00 (0.1)
K magnitude
u magnitude 17.72 (0.01) 17.72 (0.01) 17.74 (0.02)
g magnitude 17.96 (0.006) 17.96 (0.006) 17.98 (0.02)
r magnitude 18.42 (0.008) 18.42 (0.008) 18.42 (0.01)
i magnitude 18.76 (0.01) 18.76 (0.01) 18.78 (0.02)
z magnitude 19.02 (0.05) 19.02 (0.05) 19.04 (0.06)
G magnitude 18.20 (0.01) 18.24 18.20 18.20 (0.003)
BP magnitude 18.10 (0.01) 18.04
RP magnitude 18.49 (0.05) 18.40
Pan g magnitude 18.04 (0.006)
Pan r magnitude 18.42 (0.006)
Pan i magnitude 18.75 (0.007)
Pan z magnitude 19.01 (0.01)
Pan y magnitude 19.24 (0.04)
E(B-V) 0.024

* 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.