SDSS J164250.01+303716.4

All names: SDSS J164250.03+303716.25, Gaia DR3 1312279084940381056, SDSS J164250.02+303716.2, SDSS J164250.01+303716.4, GALEX J164250.0+303716, Gaia EDR3 1312279084940381056, SDSS J164250.03+303716.2, Gaia DR2 1312279084940381056

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 MWDD H Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 16 42 50.03 (0.1) 16 42 50.01 16 42 50.03 (0.2) 16 42 50.03 16 42 50.01 (0.1)
Declination 30 37 16.14 (0.1) 30 37 16.45 30 37 16.15 (0.2) 30 37 16.14 30 37 16.45 (0.1)
Spectral type DA DA DA DA DA
Effective temperature [K] 11677.0 11478.0 (35) 13148.0 (694)
log(g) [cgs] 7.89 7.91 (0.04) 8.16 (0.06)
Mass [M] 0.542 0.556 (0.02) 0.703 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.3487
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 3.80 (0.2) 3.47 (0.2) 3.80 3.80 (0.2)
Distance [pc] 262.98 (12) 288.06 (19) 262.98 262.98 (12)
Composition H
Proper motion (right ascension) [mas/yr] 13.45997771 (0.2) 13.38768834 (0.4) 13.46 (0.2)
Proper motion (declination) [mas/yr] -19.82868914 (0.2) -19.57696313 (0.5) -19.829 (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
K magnitude
u magnitude 19.24 (0.03) 19.22 (0.03) 19.24 (0.03)
g magnitude 18.82 (0.009) 18.81 (0.02) 18.82 (0.009)
r magnitude 19.04 (0.01) 19.04 (0.02) 19.04 (0.01)
i magnitude 19.24 (0.02) 19.24 (0.02) 19.24 (0.02)
z magnitude 19.51 (0.1) 19.48 (0.1) 19.50 (0.1)
G magnitude 18.90 (0.02) 18.93 18.90 18.90 (0.003)
BP magnitude 18.93 (0.02) 18.87
RP magnitude 18.98 (0.03) 18.88
Pan g magnitude 18.80 (0.005)
Pan r magnitude 19.02 (0.009)
Pan i magnitude 19.23 (0.01)
Pan z magnitude 19.50 (0.06)
Pan y magnitude 19.38 (0.04)
E(B-V) 0.020

* 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.