SDSS J121723.55+390059.4

All names: Gaia DR3 1532785351616501504, GALEX J121723.5+390100, CSO 1298, SDSS J121723.56+390059.5, Gaia EDR3 1532785351616501504, Gaia DR2 1532785351616501504, LAMOST J121723.55+390059.4, SDSS J121723.55+390059.4, SDSS J121723.56+390059.4

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Guo et al. 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 17 23.57 (0.1) 12 17 23.56 12 17 23.57 (0.2) 12 17 23.57 12 17 23.55 (0.1) 12 17 23.56
Declination 39 00 59.39 (0.08) 39 00 59.48 39 00 59.39 (0.1) 39 00 59.39 39 00 59.46 (0.08) 39 00 59.48
Spectral type DA DA DA DA DA DA
Effective temperature [K] 16804.0 21177.0 (1216) 20152.0 (234)
log(g) [cgs] 7.79 8.06 (0.07) 7.93 (0.04)
Mass [M] 0.505 0.663 (0.06) 0.588 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0924
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] 3.30 (0.2) 3.28 (0.2) 3.30 3.30 (0.2)
Distance [pc] 302.79 (14) 305.17 (20) 302.79 302.78 (14)
Composition H
Proper motion (right ascension) [mas/yr] 9.864129276 (0.1) 9.839001123 (0.3) 9.864 (0.1)
Proper motion (declination) [mas/yr] -4.807423694 (0.1) -4.93727587 (0.3) -4.807 (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 18.05 (0.01) 18.05 (0.01) 18.13 (0.05)
g magnitude 18.02 (0.006) 18.02 (0.006) 18.05 (0.02)
r magnitude 18.36 (0.007) 18.36 (0.007) 18.39 (0.02)
i magnitude 18.68 (0.01) 18.68 (0.01) 18.70 (0.02)
z magnitude 18.97 (0.04) 18.97 (0.04) 18.97 (0.04)
G magnitude 18.22 (0.009) 18.25 18.22 18.22 (0.003)
BP magnitude 18.14 (0.009) 18.11
RP magnitude 18.45 (0.04) 18.36
Pan g magnitude 18.08 (0.009)
Pan r magnitude 18.39 (0.008)
Pan i magnitude 18.69 (0.008)
Pan z magnitude 18.91 (0.02)
Pan y magnitude 19.12 (0.02)
E(B-V) 0.018

* 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.