SDSS J122221.94+171539.3

All names: Gaia DR3 3946862670560405504, SDSS J122221.93+171539.4, Gaia DR2 3946862670560405504, SDSS J122221.95+171539.3, LBQS 1219+1732, Gaia EDR3 3946862670560405504, SDSS J122221.95+171539.4, GALEX J122221.9+171540, SDSS J122221.94+171539.3

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 12 22 21.92 (0.1) 12 22 21.95 12 22 21.93 (0.2) 12 22 21.92 12 22 21.96 (0.1) 12 22 21.95
Declination 17 15 39.58 (0.08) 17 15 39.32 17 15 39.57 (0.1) 17 15 39.58 17 15 39.23 (0.08) 17 15 39.38
Spectral type DA DA DA DA DA
Effective temperature [K] 20685.0 22361.0 (1286) 23943.0 (262)
log(g) [cgs] 7.82 7.83 (0.07) 7.95 (0.04)
Mass [M] 0.532 0.541 (0.05) 0.606 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0389
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] 3.15 (0.1) 3.23 (0.2) 3.15 3.15 (0.1)
Distance [pc] 317.43 (13) 309.34 (18) 317.43 317.43 (13)
Composition H
Proper motion (right ascension) [mas/yr] -31.97792994 (0.1) -32.16080075 (0.3) -31.978 (0.1)
Proper motion (declination) [mas/yr] 22.13695348 (0.09) 22.00904328 (0.2) 22.137 (0.09)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.68 (0.01) 17.68 (0.01) 17.66 (0.03)
g magnitude 17.72 (0.006) 17.72 (0.006) 17.76 (0.02)
r magnitude 18.08 (0.007) 18.09 (0.007) 18.08 (0.01)
i magnitude 18.42 (0.01) 18.42 (0.01) 18.42 (0.02)
z magnitude 18.72 (0.04) 18.72 (0.04) 18.68 (0.04)
G magnitude 17.91 (0.01) 17.94 17.91 17.91 (0.003)
BP magnitude 17.82 (0.01) 17.78
RP magnitude 18.12 (0.02) 18.10
Pan g magnitude 17.75 (0.005)
Pan r magnitude 18.11 (0.005)
Pan i magnitude 18.44 (0.004)
Pan z magnitude 18.70 (0.008)
Pan y magnitude 18.86 (0.03)
E(B-V) 0.021

* 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.