SDSS J084039.37+125706.3

All names: GALEX J084039.3+125706, Gaia DR3 603074981009914624, SDSS J084039.37+125706.2, SDSS J084039.37+125706.3, Gaia EDR3 603074981009914624, Gaia DR2 603074981009914624, SDSS J084039.36+125706.2

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 40 39.37 (0.3) 08 40 39.37 08 40 39.37 (0.5) 08 40 39.37 (0.3) 08 40 39.37
Declination 12 57 06.50 (0.2) 12 57 06.27 12 57 06.49 (0.3) 12 57 06.18 (0.2) 12 57 06.28
Spectral type DA DAH DAH DAH DA
Effective temperature [K] 11804.4 (126) 8860.0 10604.0 (232)
log(g) [cgs] 7.91 (0.2) 7.36 7.97 (0.2)
Mass [M] 0.5513280965827256 (0.2) 0.303
log(Luminosity) [L]
Cooling age [Gyr] 0.4403
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] 2.62 (0.4) 2.56 (0.6) 2.62 (0.4)
Distance [pc] 381.34 (52) 390.26 (98) 381.33 (52)
Composition H
Proper motion (right ascension) [mas/yr] 0.1810397 (0.4) 1.318560066 (1) 0.181 (0.4)
Proper motion (declination) [mas/yr] 20.03420582 (0.3) 20.0558414 (0.5) 20.034 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.10 (0.04) 20.10 (0.04) 20.09 (0.05)
g magnitude 19.63 (0.01) 19.63 (0.01) 19.63 (0.02)
r magnitude 19.76 (0.02) 19.76 (0.02) 19.76 (0.02)
i magnitude 19.92 (0.03) 19.93 (0.03) 19.92 (0.03)
z magnitude 20.10 (0.09) 20.10 (0.09) 20.07 (0.08)
G magnitude 19.67 (0.03) 19.73 19.67 (0.004)
BP magnitude 19.81 (0.03) 19.72
RP magnitude 19.63 (0.06) 19.53
Pan g magnitude 19.68 (0.01)
Pan r magnitude 19.75 (0.01)
Pan i magnitude 19.90 (0.01)
Pan z magnitude 20.02 (0.03)
Pan y magnitude 19.96 (0.02)
E(B-V) 0.026

* 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.