SDSS J234848.77+381754.6

All names: Gaia DR2 2880031414580902784, SDSS J234848.77+381754.6, GALEX J234848.7+381754, SDSS J234848.77+381754.60, Gaia EDR3 2880031414580902784, SDSS J234848.76+381754.5, Gaia DR3 2880031414580902784

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 23 48 48.79 (0.07) 23 48 48.76 23 48 48.79 (0.1) 23 48 48.79 23 48 48.75 (0.07) 23 48 48.77
Declination 38 17 54.60 (0.06) 38 17 54.55 38 17 54.60 (0.07) 38 17 54.60 38 17 54.57 (0.06) 38 17 54.64
Spectral type DB DB DB DB DB
Effective temperature [K] 25198.0 16455.0 14268.0 23924.0 (478) 16157.0 (677) 23943.0 (478)
log(g) [cgs] 8.09 7.96 7.77 8.06 (0.05) 7.94 (0.06) 8.13 (0.05)
Mass [M] 0.659 0.569 0.467 0.557 (0.04) 0.677 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.1663
log(H/He) -4.096 <-3.32
log(C/He)
log(Ca/He) <-4.0
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] 4.72 (0.1) 4.74 (0.1) 4.72 4.72 (0.1)
Distance [pc] 211.85 (5) 210.88 (7) 240.00 211.85 211.85 (5)
Composition He
Proper motion (right ascension) [mas/yr] 29.30089038 (0.09) 29.24997111 (0.2) 29.301 (0.09)
Proper motion (declination) [mas/yr] 1.849200762 (0.08) 1.58373552 (0.1) 1.849 (0.08)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.50 (0.01) 17.50 (0.01) 17.50 (0.01)
g magnitude 17.53 (0.005) 17.53 (0.005) 17.55 (0.01)
r magnitude 17.82 (0.007) 17.82 (0.007) 17.83 (0.01)
i magnitude 18.07 (0.008) 18.07 (0.008) 18.07 (0.01)
z magnitude 18.33 (0.02) 18.33 (0.02) 18.32 (0.03)
G magnitude 17.67 (0.008) 17.70 17.67 17.67 (0.003)
BP magnitude 17.63 (0.008) 17.61
RP magnitude 17.79 (0.02) 17.76
Pan g magnitude 17.59 (0.004)
Pan r magnitude 17.83 (0.009)
Pan i magnitude 18.10 (0.005)
Pan z magnitude 18.31 (0.007)
Pan y magnitude 18.44 (0.02)
E(B-V) 0.042

* 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.