SDSS J074257.18+423029.4

All names: SDSS J074257.16+423029.5, SDSS J074257.18+423029.4, Gaia DR2 924222162612454016, SDSS J074257.18+423029.44, Gaia EDR3 924222162612454016, SDSS J074257.16+423029.6, Gaia DR3 924222162612454016

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 07 42 57.17 (0.3) 07 42 57.17 07 42 57.17 (0.4) 07 42 57.17 07 42 57.17 (0.3)
Declination 42 30 29.39 (0.2) 42 30 29.64 42 30 29.40 (0.3) 42 30 29.39 42 30 29.61 (0.2)
Spectral type DB DB DB DB DB
Effective temperature [K] 14139.0 13052.0 11798.0 12555.0 (141) 12926.0 (132) 11499.0 (957)
log(g) [cgs] 9.00 8.32 8.19 8.00 (0) 8.00 (0) 8.05 (0.1)
Mass [M] 1.187 0.788 0.703 0.614 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.5409
log(H/He) -5.325 <-5.5
log(C/He)
log(Ca/He) <-9.21
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] 3.35 (0.3) 3.53 (0.5) 3.35 3.35 (0.3)
Distance [pc] 298.79 (28) 283.47 (39) 329.00 298.79 298.79 (28)
Composition He
Proper motion (right ascension) [mas/yr] 5.54234653 (0.3) 5.029009438 (0.7) 5.542 (0.3)
Proper motion (declination) [mas/yr] -13.77942541 (0.2) -13.5670198 (0.6) -13.779 (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 19.30 (0.02) 19.30 (0.02) 19.30 (0.03)
g magnitude 19.28 (0.01) 19.28 (0.01) 19.28 (0.01)
r magnitude 19.51 (0.02) 19.51 (0.02) 19.51 (0.02)
i magnitude 19.71 (0.02) 19.71 (0.02) 19.71 (0.02)
z magnitude 19.97 (0.1) 19.97 (0.1) 19.97 (0.1)
G magnitude 19.37 (0.04) 19.44 19.37 19.37 (0.004)
BP magnitude 19.35 (0.04) 19.37
RP magnitude 19.36 (0.04) 19.37
Pan g magnitude 19.32 (0.007)
Pan r magnitude 19.52 (0.01)
Pan i magnitude 19.70 (0.01)
Pan z magnitude 19.88 (0.03)
Pan y magnitude 19.93 (0.07)
E(B-V) 0.021

* 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.