SDSS J084911.86+403649.6

All names: GALEX J084911.8+403650, SDSS J084911.87+403649.7, SDSS J084911.86+403649.6, Gaia DR3 912415155781038464, WD 0845+407, Gaia DR2 912415155781038464, J0849+4036, Gaia EDR3 912415155781038464, SDSS J084911.86+403649.7

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Coutu et al. 2019 Gaia DR2 Stilism Dufour et al. 2007 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 49 11.81 (0.1) 08 49 11.86 08 49 11.87 08 49 11.82 (0.2) 08 49 11.81 08 49 11.87 (0.1) 08 49 11.86 08 49 11.52 08 49 11.87
Declination 40 36 49.14 (0.09) 40 36 49.62 40 36 49.75 40 36 49.16 (0.1) 40 36 49.14 40 36 49.75 (0.09) 40 36 49.71 40 36 45.00 40 36 49.71
Spectral type DZ DZ DZ DZ DZ DZ DZ DZ
Effective temperature [K] 9388.0 (295) 9230.0 (140) 9287.0 (204) 10120.0 (55) 10157.0 (78)
log(g) [cgs] 8.20 8.00 8.12 (0.03) 8.35 (0.6) 9.46 (0.4)
Mass [M] 0.7008 0.65 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.9810
log(H/He) <-5.6872 <-5.0
log(C/He)
log(Ca/He) -10.119 (0.09) -10.35 (0.07)
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] 8.14 (0.2) 8.12 8.12 (0.2) 8.14 8.14 (0.2)
Distance [pc] 122.83 (2) 123.16 (3) 123.16 (3) 134.00 122.83 122.83 (2)
Composition He He
Proper motion (right ascension) [mas/yr] -42.50999956 (0.1) -42.6467189 (0.3) -42.51 (0.1)
Proper motion (declination) [mas/yr] -38.29279361 (0.1) -38.19070363 (0.2) -38.293 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.39 (0.01) 18.39 (0.01) 18.44 (0.02) 18.43 18.45 (0.02)
g magnitude 18.16 (0.006) 18.16 (0.006) 18.19 (0.02) 18.18 18.18 (0.02)
r magnitude 18.25 (0.008) 18.25 (0.008) 18.29 (0.02) 18.28 18.29 (0.02)
i magnitude 18.36 (0.01) 18.36 (0.01) 18.37 (0.02) 18.36 18.39 (0.02)
z magnitude 18.50 (0.03) 18.50 (0.03) 18.54 (0.03) 18.53 18.55 (0.03)
G magnitude 18.18 (0.01) 18.21 18.18 18.18 (0.003)
BP magnitude 18.20 (0.01) 18.20
RP magnitude 18.10 (0.02) 18.09
Pan g magnitude 18.21 (0.004)
Pan r magnitude 18.28 (0.005)
Pan i magnitude 18.42 (0.005)
Pan z magnitude 18.56 (0.006)
Pan y magnitude 18.66 (0.03)
E(B-V) 0.005

* 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.