Gaia DR2 666111739274159360

All names: WDJ08407.57+224437.10, J0840+2244, SDSS J084007.51+224437.3, Gaia EDR3 666111739274159360, USNO-B1.0 1127-00194918, Gaia DR3 666111739274159360, LSPM J0840+2244, WDJ084007.57+224437.11, Gaia DR2 666111739274159360

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Caron et al. 2023 Kilic et al. 2020 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018
Right ascension 08 40 07.32 (0.1) 08 40 07.33 08 40 07.32 08 40 07.57 (0.1) 08 40 07.33
Declination 22 44 37.76 (0.1) 22 44 37.74 22 44 37.76 22 44 37.11 (0.1) 22 44 37.74
Spectral type DC DC DC DC: DC
Effective temperature [K] 6345.0 (62) 6418.0 (47) 5014.0 (38) 6666.0 6408.0 6316.0 (196)
log(g) [cgs] 8.13 (0.02) 8.15 (0.02) 7.48 (0.03) 8.31 8.19 8.21 (0.04)
Mass [M] 0.654 (0.02) 0.667 (0.02) 0.309 (0.02) 0.786 0.693 0.709 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 2.7800 3.3070 3.0940
log(H/He) -3.2 -3.2 -5
log(C/He)
log(Ca/He)
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] 13.86 (0.2) 13.86 (0.2) 13.86 (0.2) 13.86 13.86 (0.2) 13.86 (0.2)
Distance [pc] 72.13 (0.9) 72.15 (1) 72.14 (1) 72.13 72.13 (0.9) 72.14 (1)
Composition He
Proper motion (right ascension) [mas/yr] -211.3454327 (0.2) -211.5973972 (0.4) -211.345 (0.2) -211.5973972
Proper motion (declination) [mas/yr] 40.83843071 (0.1) 40.8167621 (0.3) 40.838 (0.1) 40.8167621
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.40
V magnitude
R magnitude 16.60
I magnitude
J magnitude 17.81 (0.04)
H magnitude 17.48 (0.07)
K magnitude 17.58 (0.1)
u magnitude 19.16 (0.03) 21.20 (0.1) 19.18 (0.03)
g magnitude 25.11 (1) 18.54 (0.01)
r magnitude 18.32 (0.008) 18.35 (0.01)
i magnitude 24.36 (1) 18.31 (0.01)
z magnitude 18.37 (0.03) 18.36 (0.03)
G magnitude 18.36 (0.02) 18.38 18.36 18.36 (0.003) 18.38
BP magnitude 18.57 (0.02) 18.53 18.53
RP magnitude 18.02 (0.02) 17.96 17.96
Pan g magnitude 18.56 (0.008) 18.56 (0.009)
Pan r magnitude 18.38 (0.008) 18.38 (0.008)
Pan i magnitude 18.30 (0.01) 18.30 (0.01)
Pan z magnitude 18.37 (0.007) 18.37 (0.007)
Pan y magnitude 18.32 (0.02) 18.32 (0.02)
E(B-V) 0.002

* 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.