SDSS J084417.23+212414.5

All names: SDSS J084417.23+212414.5, SDSS J084417.23+212414.6, Gaia DR2 664899901364221184, Gaia EDR3 664899901364221184, Gaia DR3 664899901364221184, SDSS J084417.23+212414.4

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 44 17.24 (0.2) 08 44 17.24 08 44 17.24 (0.3) 08 44 17.24 08 44 17.23 (0.2) 08 44 17.23
Declination 21 24 14.25 (0.08) 21 24 14.45 21 24 14.27 (0.2) 21 24 14.25 21 24 14.68 (0.08) 21 24 14.57
Spectral type DA DA DA DA DA
Effective temperature [K] 18361.0 17121.0 (1018) 19142.0 (276)
log(g) [cgs] 8.31 8.03 (0.09) 7.78 (0.05)
Mass [M] 0.809 0.635 (0.08) 0.516 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.1794
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] 3.20 (0.2) 3.66 (0.4) 3.20 3.20 (0.2)
Distance [pc] 312.25 (23) 273.12 (27) 312.25 312.26 (23)
Composition H
Proper motion (right ascension) [mas/yr] 9.76014577 (0.2) 10.80711831 (0.6) 9.76 (0.2)
Proper motion (declination) [mas/yr] -26.76442655 (0.2) -27.24323364 (0.4) -26.764 (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 18.60 (0.02) 18.59 (0.02) 18.53 (0.03)
g magnitude 18.42 (0.007) 18.43 (0.007) 18.42 (0.02)
r magnitude 18.76 (0.01) 18.76 (0.01) 18.75 (0.02)
i magnitude 18.96 (0.01) 18.96 (0.01) 19.04 (0.02)
z magnitude 19.36 (0.06) 19.36 (0.06) 19.44 (0.07)
G magnitude 18.61 (0.02) 18.64 18.61 18.61 (0.003)
BP magnitude 18.60 (0.02) 18.55
RP magnitude 18.78 (0.03) 18.71
Pan g magnitude 18.47 (0.005)
Pan r magnitude 18.77 (0.007)
Pan i magnitude 19.08 (0.009)
Pan z magnitude 19.34 (0.02)
Pan y magnitude 19.56 (0.06)
E(B-V) 0.019

* 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.