SDSS J084200.24+362540.0

All names: GALEX J084200.2+362540, Gaia DR3 717705287317984000, SDSS J084200.24+362539.9, SDSS J084200.24+362540.1, WD 0838+366, Gaia EDR3 717705287317984000, SDSS J084200.24+362540.0, J0842+3625, Gaia DR2 717705287317984000

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Coutu et al. 2019 Gaia DR2 Stilism Dufour et al. 2007 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 42 00.24 (0.2) 08 42 00.24 08 42 00.25 08 42 00.24 (0.2) 08 42 00.24 08 42 00.25 (0.2) 08 42 00.24 08 41 59.57 08 42 00.24
Declination 36 25 39.76 (0.1) 36 25 40.11 36 25 40.11 36 25 39.77 (0.2) 36 25 39.76 36 25 40.11 (0.1) 36 25 40.09 36 25 38.64 36 25 40.05
Spectral type DZA DZA DZ DZA DZA DZA DZA DZ
Effective temperature [K] 10322.0 (424) 10320.0 (240) 9931.0 (377) 11136.0 (251) 11096.0 (366)
log(g) [cgs] 8.02 8.00 7.89 (0.07) 8.37 (0.5) 9.40 (0.4)
Mass [M] 0.5914 0.518 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.5880
log(H/He) -4.7784 (0.2) -4.78 (0.1)
log(C/He)
log(Ca/He) -8.9957 (0.1) -9.08 (0.08)
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] 4.75 (0.2) 4.68 4.68 (0.3) 4.75 4.75 (0.2)
Distance [pc] 210.37 (10) 213.75 (14) 213.75 (14) 218.00 210.37 210.38 (10)
Composition He He
Proper motion (right ascension) [mas/yr] -1.052444745 (0.2) -1.036591253 (0.5) -1.052 (0.2) 3.1
Proper motion (declination) [mas/yr] -22.20245288 (0.2) -22.15574735 (0.4) -22.202 (0.2) -18.9
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.95 (0.02) 18.95 (0.02) 18.98 (0.02) 18.98 18.97 (0.02)
g magnitude 18.83 (0.009) 18.83 (0.009) 18.86 (0.02) 18.86 18.85 (0.02)
r magnitude 18.97 (0.01) 18.97 (0.01) 19.01 (0.02) 19.00 19.00 (0.02)
i magnitude 19.13 (0.01) 19.13 (0.01) 19.14 (0.03) 19.13 19.13 (0.03)
z magnitude 19.41 (0.06) 19.41 (0.06) 19.41 (0.06) 19.40 19.41 (0.06)
G magnitude 18.89 (0.03) 18.93 18.89 18.89 (0.003)
BP magnitude 18.95 (0.03) 18.86
RP magnitude 18.83 (0.03) 18.81
Pan g magnitude 18.87 (0.01)
Pan r magnitude 19.00 (0.006)
Pan i magnitude 19.17 (0.007)
Pan z magnitude 19.32 (0.01)
Pan y magnitude 19.51 (0.06)
E(B-V) 0.011

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.