SDSS J074733.41+213937.8

All names: SDSS J074733.42+213937.9, Gaia DR3 674530351913993728, Gaia DR2 674530351913993728, SDSS J074733.42+213937.90, WD 0744+217, SDSS J074733.41+213937.8, Gaia EDR3 674530351913993728, GALEX J074733.4+213938

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 07 47 33.42 (0.7) 07 47 33.41 07 47 33.42 (1) 07 47 33.42 (0.7) 07 47 33.42 07 47 33.55 07 47 33.42
Declination 21 39 37.84 (0.5) 21 39 37.89 21 39 37.84 (0.7) 21 39 37.90 (0.5) 21 39 37.89 21 39 32.40 21 39 37.89
Spectral type DB DB DB DB DBA DB
Effective temperature [K] 17456.0 14493.0 13237.0 16645.0 (726) 15287.0 (737)
log(g) [cgs] 9.63 7.04 6.94 8.49 (0.3) 8.47 (0.4)
Mass [M] 1.412 0.232 0.208
log(Luminosity) [L]
Cooling age [Gyr]
log(H/He) <-5.439
log(C/He)
log(Ca/He)
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] 1.24 (0.8) 0.87 (1) 1.24 (0.8)
Distance [pc] 806.11 (521) 1143.15 (1380) 806.13 (521)
Composition He
Proper motion (right ascension) [mas/yr] -2.131332249 (1) -4.501658578 (2) -2.131 (1) -0.9
Proper motion (declination) [mas/yr] -3.780559486 (0.7) -4.335198124 (2) -3.781 (0.7) -6.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.27 (0.05) 20.19 (0.05) 20.19 (0.05) 20.18 20.18 (0.05)
g magnitude 20.29 (0.02) 20.36 (0.02) 20.35 (0.03) 20.35 20.36 (0.03)
r magnitude 20.47 (0.03) 20.51 (0.04) 20.50 (0.04) 20.50 20.50 (0.04)
i magnitude 20.72 (0.05) 20.82 (0.07) 20.80 (0.07) 20.80 20.81 (0.07)
z magnitude 21.07 (0.3) 21.32 (0.4) 21.27 (0.4) 21.28 21.27 (0.4)
G magnitude 20.43 (0.09) 20.48 20.43 (0.009)
BP magnitude 20.32 (0.09) 20.13
RP magnitude 20.44 (0.2) 20.27
Pan g magnitude 20.33 (0.03)
Pan r magnitude 20.53 (0.02)
Pan i magnitude 20.72 (0.04)
Pan z magnitude 20.83 (0.1)
Pan y magnitude
E(B-V) 0.044

* 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.