Gaia DR2 938351982245743360

All names: Gaia DR2 938351982245743360, Gaia DR3 938351982245743360, USNO-B1.0 1234-00155206, NLTT 16820, J0640+3327, GALEX J064033.5+332737, LP 254-13, WDJ064033.53+332737.95, LSPM J0640+3327, Gaia EDR3 938351982245743360, 0637+335

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Caron et al. 2023 Leggett et al. 2018 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018
Right ascension 06 40 33.58 (0.08) 06 40 33.58 06 40 33.58 06 40 33.53 (0.08) 06 40 33.58
Declination 33 27 35.03 (0.07) 33 27 35.13 33 27 35.03 33 27 37.96 (0.07) 33 27 35.13
Spectral type DC DC5.7 DZ DC
Effective temperature [K] 8026.0 (49) 8336.0 (276) 8479.0 8191.0 7751.0 (109)
log(g) [cgs] 8.08 (0.01) 8.26 (0.1) 8.29 8.20 8.05 (0.02)
Mass [M] 0.623 (0.01) 0.739 (0.1) 0.78 0.704 0.609 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 1.2900 1.5010 (0.4) 1.4600 1.4120
log(H/He) -3.8
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] 15.46 (0.09) 15.54 (0.1) 15.76 (2) 15.54 (0.1) 15.46 15.46 (0.09) 15.54 (0.1)
Distance [pc] 64.67 (0.4) 64.35 (0.4) 63.45 (6) 64.35 (0.4) 64.67 64.67 (0.4) 64.35 (0.4)
Composition He
Proper motion (right ascension) [mas/yr] 33.84087467 (0.1) 33.75081853 (0.2) 33.841 (0.1) 33.75081853
Proper motion (declination) [mas/yr] -182.5914692 (0.08) -182.5552766 (0.1) -182.591 (0.08) -182.5552766
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.30
V magnitude
R magnitude 17.00
I magnitude
J magnitude 16.97 (0.03)
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 17.21 (0.008) 17.23 17.21 17.21 (0.003) 17.23
BP magnitude 17.33 (0.008) 17.33 17.33
RP magnitude 17.00 (0.02) 17.01 17.01
Pan g magnitude 17.31 (0.004) 17.31 (0.004)
Pan r magnitude 17.26 (0.003) 17.26 (0.002)
Pan i magnitude 17.34 (0.003) 17.34 (0.003)
Pan z magnitude 17.47 (0.005) 17.47 (0.006)
Pan y magnitude 17.51 (0.009) 17.51 (0.01)
E(B-V) 0.001

* 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.