SDSS J094235.01+205208.3

All names: SDSS J094235.02+205208.3, SDSS J094235.01+205208.4, GALEX J094235.0+205208, Gaia DR3 639900580361748736, SDSS J094235.02+205208.2, Gaia EDR3 639900580361748736, SDSS J094235.01+205208.3, WD 0939+210, Gaia DR2 639900580361748736

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Kulebi et al. 2009 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 42 35.02 (0.2) 09 42 35.02 09 42 35.02 (0.3) 09 42 35.02 09 42 35.02 09 42 35.03 (0.2) 09 42 34.34 09 42 35.02
Declination 20 52 08.33 (0.1) 20 52 08.32 20 52 08.33 (0.2) 20 52 08.29 20 52 08.33 20 52 08.23 (0.1) 20 52 04.08 20 52 08.32
Spectral type DAH DA DA DAH DQ DAH DAH2.5 DAH hotDQ
Effective temperature [K] 21824.0 (935) 17836.0 20000.0 14305.0 (736) 13277.0 (140)
log(g) [cgs] 8.78 (0.5) 8.64 8.00 (0) 8.55 (0.07) 9.99 (0.02)
Mass [M] 1.098171685500553 (0.5) 1.015 0.942 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.3508
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] 5.11 (0.2) 4.91 (0.4) 5.11 5.11 (0.2)
Distance [pc] 195.68 (8) 203.77 (16) 195.68 195.68 (8)
Composition H H
Proper motion (right ascension) [mas/yr] -8.092581374 (0.2) -7.910612012 (0.5) -8.093 (0.2)
Proper motion (declination) [mas/yr] 6.464612383 (0.2) 6.603780812 (0.4) 6.465 (0.2)
Variability
Magnetic yes yes yes yes
Bd [MG] 40.55227647256328 39.21 (5) 39.21 (5)
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.38 (0.02) 18.38 (0.02) 18.41 18.42 (0.02)
g magnitude 18.42 (0.007) 18.42 (0.007) 18.42 18.44 (0.02)
r magnitude 18.79 (0.009) 18.79 (0.009) 18.80 18.80 (0.02)
i magnitude 19.05 (0.01) 19.05 (0.01) 19.05 19.05 (0.02)
z magnitude 19.25 (0.05) 19.25 (0.05) 19.26 19.24 (0.05)
G magnitude 18.61 (0.02) 18.64 18.61 18.61 (0.003)
BP magnitude 18.54 (0.02) 18.48
RP magnitude 18.81 (0.04) 18.82
Pan g magnitude 18.45 (0.004)
Pan r magnitude 18.76 (0.006)
Pan i magnitude 19.10 (0.008)
Pan z magnitude 19.26 (0.02)
Pan y magnitude 19.35 (0.09)
E(B-V) 0.013

* 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.