SDSS J233854.40+434636.3

All names: SDSS J233854.40+434636.3, Gaia DR3 1926426869597026816, Gaia EDR3 1926426869597026816, Gaia DR2 1926426869597026816, SDSS J233854.39+434636.2

Parameter Unit Gaia EDR3 SDSS DR12 MWDD H Gaia DR2 Simbad Kleinman et al. 2013
Right ascension 23 38 54.39 (0.7) 23 38 54.39 23 38 54.39 (1) 23 38 54.40 (0.7) 23 38 54.40
Declination 43 46 36.16 (0.6) 43 46 36.25 43 46 36.16 (0.8) 43 46 36.26 (0.6) 43 46 36.27
Spectral type DA DA DA
Effective temperature [K] 17121.0 17690.0 (801)
log(g) [cgs] 6.74 7.99 (0.2)
Mass [M☉] 0.22 0.612 (0.09)
log(Luminosity) [L☉]
Cooling age [Gyr]
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] -0.17 (0.9) -0.47 (1)
Distance [pc]
Composition H
Proper motion (right ascension) [mas/yr] -3.734606919 (0.8) -7.141308387 (2) -3.735 (0.8)
Proper motion (declination) [mas/yr] -6.326232331 (0.8) -3.747045044 (2) -6.326 (0.8)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.86 (0.06) 20.90 (0.07) 20.90 (0.07)
g magnitude 20.60 (0.02) 20.62 (0.02) 20.62 (0.02)
r magnitude 20.74 (0.03) 20.74 (0.03) 20.74 (0.03)
i magnitude 21.01 (0.06) 21.00 (0.05) 21.00 (0.05)
z magnitude 21.55 (0.3) 21.55 (0.3) 21.55 (0.3)
G magnitude 20.66 (0.1) 20.74 20.66 (0.009)
BP magnitude 20.53 (0.1) 20.87
RP magnitude 20.31 (0.2) 20.64
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V)

* 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.