US 2839

All names: US 2839, Gaia DR3 4020619422380179456, Gaia DR2 4020619422380179456, SDSS J114245.28+290432.60, SDSS J114245.28+290432.6, GALEX J114245.3+290432, SDSS J114245.27+290432.6, SDSS J114245.26+290432.5, Gaia EDR3 4020619422380179456

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 11 42 45.26 (0.2) 11 42 45.27 11 42 45.26 (0.3) 11 42 45.29 (0.2) 11 42 45.28
Declination 29 04 32.55 (0.2) 29 04 32.62 29 04 32.56 (0.3) 29 04 32.63 (0.2) 29 04 32.65
Spectral type DBAH: DBAH DBAH: DB
Effective temperature [K] 13434.0 12979.0 12037.0 12091.0 (96) 13263.0 (433)
log(g) [cgs] 8.88 8.16 8.08 8.00 (0) 9.15 (0.3)
Mass [M] 1.128 0.684 0.633
log(Luminosity) [L]
Cooling age [Gyr] 0.4289
log(H/He) -4.601 -5.18 (0.2)
log(C/He)
log(Ca/He) <-9.93
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] 4.64 (0.3) 4.52 (0.3) 4.64 (0.3)
Distance [pc] 215.58 (13) 221.32 (17) 224.00 215.58 (13)
Composition He
Proper motion (right ascension) [mas/yr] -26.59850284 (0.3) -27.16089456 (0.5) -26.599 (0.3)
Proper motion (declination) [mas/yr] -5.081077877 (0.3) -5.066180168 (0.6) -5.081 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.60
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.53 (0.02) 18.53 (0.02) 18.53 (0.05)
g magnitude 18.52 (0.007) 18.52 (0.007) 18.54 (0.03)
r magnitude 18.77 (0.01) 18.77 (0.01) 18.75 (0.03)
i magnitude 18.95 (0.01) 18.95 (0.01) 18.95 (0.02)
z magnitude 19.21 (0.05) 19.21 (0.05) 19.21 (0.06)
G magnitude 18.62 (0.03) 18.65 18.62 (0.004)
BP magnitude 18.63 (0.03) 18.57
RP magnitude 18.56 (0.06) 18.57
Pan g magnitude 18.59 (0.006)
Pan r magnitude 18.73 (0.006)
Pan i magnitude 18.95 (0.008)
Pan z magnitude 19.13 (0.01)
Pan y magnitude 19.34 (0.03)
E(B-V) 0.016

* 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.