GD 378

All names: EGGR 242, GALEX J182336.8+410402, Gaia EDR3 2109852523240471936, WDJ182337.01+410402.11, UBV M 43081, SDSS J182337.01+410402.9, uvby98 610060378, Gaia DR3 2109852523240471936, FBS 1822+410, UCAC4 656-064738, FBS B 170, 1SWASP J182337.00+410402.2, Gaia DR2 2109852523240471936, SDSS J182337.01+410402.8, WD 1822+410, GEN# +6.10060378, TIC 288753941, WD 1822+41, GD 378, 2MASS J18233701+4104018, GD378

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 MWDD HE Gaia DR2 Stilism Koester et al. 2014 Bergeron et al. 2011 Zuckerman et al. 2010 Desharnais et al. 2008 Wolff et al. 2002 Sion et al. 1990 Wegner et al. 1987 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 18 23 37.01 (0.02) 18 23 37.01 (0.02) 18 23 37.01 18 23 37.01 (0.02) 18 23 37.01 18 23 36.89
Declination 41 04 04.32 (0.02) 41 04 04.25 (0.02) 41 04 04.32 41 04 02.11 (0.02) 41 04 04.25 41 03 51.84
Spectral type DBAZ DBA DBA DBAZ DBAZ DB DBAZ4 DBA3
Effective temperature [K] 15453.0 (128) 15307.0 16230.0 16230.0 (385) 16800.0 16600.0 17000.0 (800) 16000.0 16000.0 16520.0 (173)
log(g) [cgs] 7.92 (0.009) 7.91 8.01 8.01 (0.08) 7.90 (0.2) 8.02 (0.01)
Mass [M☉] 0.545 (0.007) 0.541 0.6 (0.05) 0.603 (0.009)
log(Luminosity) [L☉] -2.00
Cooling age [Gyr] 0.1610 0.1660 1.5000
log(H/He) -5.0 -4.45 (0.06) -4
log(C/He) -7.2 -6.9 <-6.7 <-6.7
log(Ca/He) -8 -7.9 -8.15 (0.5)
log(Ca/H)
log(N/He) <-7.5
log(O/He) -6
log(Na/He)
log(Mg/He) -6.5 (0.8)
log(Al/He)
log(Si/He) -7.4 -7.2 <-6.5
log(P/He) <-8.8
log(S/He) -7.7
log(Cl/He) <-7.7
log(Sc/He)
log(Ti/He)
log(V/He) <-8
log(Cr/He) <-7.8
log(Mn/He)
log(Fe/He) -7.3 <-5.5
log(Co/He) <-7.3
log(Ni/He) <-7.5
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He) <-9.2
log(Sr/He)
Parallax [mas] 22.92 (0.02) 22.93 (0.03) 22.92 22.92 (0.02) 22.93 (0.03)
Distance [pc] 43.62 (0.04) 43.60 (0.05) 45.00 43.62 43.62 (0.04) 43.60 (0.05)
Composition He He He
Proper motion (right ascension) [mas/yr] 0.531326631 (0.02) 0.493103562 (0.05) 0.531 (0.02) 0.493103562
Proper motion (declination) [mas/yr] 138.3404756 (0.03) 138.4630397 (0.05) 138.34 (0.03) 138.4630397
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.21 (0.0007)
V magnitude 14.39 14.29 (0.0005)
R magnitude 14.32 (0.002)
I magnitude 14.38 (0.003)
J magnitude 14.61 (0.03)
H magnitude 14.66 (0.05)
K magnitude 14.70 (0.1)
u magnitude 14.01 (0.003) 14.01 (0.003)
g magnitude 14.09 (0.003) 14.09 (0.003)
r magnitude 14.42 (0.003) 14.42 (0.003)
i magnitude 14.66 (0.004) 14.66 (0.004)
z magnitude 14.91 (0.005) 14.91 (0.005)
G magnitude 14.26 (0.001) 14.28 14.26 14.26 (0.003) 14.28
BP magnitude 14.19 (0.001) 14.15 14.15
RP magnitude 14.38 (0.0009) 14.38 14.38
Pan g magnitude 14.18 (0.004)
Pan r magnitude 14.45 (0.0007)
Pan i magnitude 14.71 (0.002)
Pan z magnitude 14.93 (0.002)
Pan y magnitude 15.11 (0.003)
E(B-V) 0.006

* 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.