SDSS J220554.02+055252.9

All names: SDSS J220554.02+055252.8, SDSS J220554.01+055252.6, SDSS J220554.02+055252.9, SDSS J220554.02+055252.90, Gaia DR2 2720498530862520832, Gaia DR3 2720498530862520832, GALEX J220553.8+055252, Gaia EDR3 2720498530862520832, SDSS J220554.01+055252.8

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 05 54.02 (0.2) 22 05 54.02 22 05 54.02 (0.2) 22 05 54.02 22 05 54.02 (0.2) 22 05 54.02
Declination 05 52 52.06 (0.2) 05 52 52.84 05 52 52.10 (0.2) 05 52 52.06 05 52 53.23 (0.2) 05 52 52.88
Spectral type DB:DC DC: DB DB:DC DB:
Effective temperature [K] 11935.0 11459.0 10575.0 11072.0 (105) 10529.0 (513) 12353.0 (339)
log(g) [cgs] 8.20 8.07 7.95 8.00 (0) 7.83 (0.09) 9.03 (0.2)
Mass [M] 0.709 0.628 0.553 0.487 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.5030
log(H/He) <-6.536 <-5.82
log(C/He)
log(Ca/He) <-10.65
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 5.10 (0.2) 5.33 (0.3) 5.10 5.10 (0.2)
Distance [pc] 196.07 (7) 187.62 (1e+01) 182.00 196.07 196.07 (7)
Composition He
Proper motion (right ascension) [mas/yr] 6.900685868 (0.2) 6.29709847 (0.4) 6.901 (0.2)
Proper motion (declination) [mas/yr] -72.8774043 (0.2) -72.50100215 (0.4) -72.877 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.49 (0.02) 18.49 (0.02) 18.44 (0.02)
g magnitude 18.40 (0.007) 18.40 (0.007) 18.39 (0.01)
r magnitude 18.53 (0.009) 18.53 (0.009) 18.52 (0.02)
i magnitude 18.69 (0.01) 18.69 (0.01) 18.69 (0.02)
z magnitude 18.85 (0.03) 18.85 (0.03) 18.82 (0.04)
G magnitude 18.44 (0.03) 18.47 18.44 18.44 (0.004)
BP magnitude 18.41 (0.03) 18.41
RP magnitude 18.32 (0.02) 18.35
Pan g magnitude 18.39 (0.002)
Pan r magnitude 18.51 (0.01)
Pan i magnitude 18.69 (0.004)
Pan z magnitude 18.86 (0.01)
Pan y magnitude 18.93 (0.01)
E(B-V) 0.036

* 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.