WD J1218+0042

All names: J1218+0042, Gaia DR2 3698504571761639808, SDSS J121830.68+004216.3, Gaia EDR3 3698504571761639808, WD 1215+009, SDSS J121830.68+004216.1, Gaia DR3 3698504571761639808

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Kepler et al. 2005 Vincent et al. 2024 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Kleinman et al. 2004 Vincent et al. 2023
Right ascension 12 18 30.65 (0.2) 12 18 30.68 12 18 30.65 (0.2) 12 18 30.65 12 18 30.68 12 18 29.69 12 18 30.68 12 18 30.68
Declination 00 42 15.60 (0.1) 00 42 16.20 00 42 15.61 (0.1) 00 42 15.60 00 42 16.18 00 42 08.64 00 42 16.25 00 42 16.27
Spectral type DA DA DA DA DA4.5 DA DA
Effective temperature [K] 10218.0 11480.0 (160) 11170.0 10676.0 (386) 11123.0 (93) 11060.0 (80) 11170.0 (94)
log(g) [cgs] 7.67 8.19 (0.07) 8.06 7.73 (0.07) 8.16 (0.07) 8.21 (0.06) 8.19 (0.07)
Mass [M☉] 0.426 0.72 (0.04) 0.455 (0.05) 0.724 (0.04)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.3851 0.5754
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] 4.15 (0.2) 4.19 (0.3) 4.15
Distance [pc] 240.78 (1e+01) 238.67 (14) 240.78
Composition H H
Proper motion (right ascension) [mas/yr] -25.56928697 (0.2) -25.77124106 (0.6) -26.0 -26.0
Proper motion (declination) [mas/yr] -31.04462274 (0.1) -31.01085762 (0.3) -36.2 -37.0
Variability VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude 18.50
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.94 (0.02) 18.95 (0.02) 18.93 18.95 (0.02) 18.93 (0.02)
g magnitude 18.48 (0.007) 18.51 (0.02) 18.52 18.50 (0.02) 18.52 (0.02)
r magnitude 18.60 (0.009) 18.62 (0.02) 18.62 18.61 (0.02) 18.62 (0.02)
i magnitude 18.75 (0.01) 18.76 (0.02) 18.77 18.76 (0.02) 18.77 (0.02)
z magnitude 18.95 (0.04) 18.97 (0.04) 18.97 18.96 (0.04) 18.97 (0.04)
G magnitude 18.53 (0.02) 18.56 18.53
BP magnitude 18.54 (0.02) 18.52
RP magnitude 18.51 (0.05) 18.43
Pan g magnitude 18.49 (0.007)
Pan r magnitude 18.61 (0.008)
Pan i magnitude 18.79 (0.007)
Pan z magnitude 18.94 (0.01)
Pan y magnitude 19.03 (0.05)
E(B-V) 0.022
Period #1 [s] 100.0
Amplitude #1 [mma] 11
Period #2 [s] 152.0
Amplitude #2 [mma] 5.1
Period #3 [s] 175.0
Amplitude #3 [mma] 10.0
Period #4 [s] 258.0
Amplitude #4 [mma] 8.2

* 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.