2MASS J16392030+4030413

All names: Gaia DR2 1355979969155873792, WD 1637+406, Gaia EDR3 1355979969155873792, J1639+4030, PSO J249.8346+40.5117, SDSS J163920.30+403041.5, TIC 68934541, WIRED J163920.29+403041.5, WDJ163920.29+403041.44, LAMOST J163920.29+403041.5, GALEX J163920.3+403041, SDSS J163920.29+403041.5, 2MASS J16392030+4030413, Gaia DR3 1355979969155873792, [CCS88] 1637.7+4036, SDSS J163920.29+403041.4, SDSS J163920.29+403041.6

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 Kilic et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Stilism Guo et al. 2015 Tremblay et al. 2011 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 39 20.32 (0.05) 16 39 20.29 16 39 20.31 (0.06) 16 39 20.32 16 39 20.29 (0.05) 16 39 20.31 16 39 20.29 16 39 20.18 16 39 20.30
Declination 40 30 42.35 (0.06) 40 30 41.55 40 30 42.32 (0.07) 40 30 42.35 40 30 41.45 (0.06) 40 30 42.32 40 30 41.56 40 30 35.28 40 30 41.52
Spectral type DA DA DA DA DA DA DA DA DA DA DA_auto DA DA DA
Effective temperature [K] 8308.0 (58) 8275.0 (48) 8309.0 (58) 8200.0 (95) 8267.0 8320.0 (20) 8439.0 (90) 8561.0 (19) 8235.0 (22)
log(g) [cgs] 8.13 (0.01) 8.12 (0.01) 8.13 (0.01) 8.11 (0.03) 8.12 8.32 (0.03) 8.17 (0.02) 8.48 (0.02) 8.18 (0.03)
Mass [M] 0.678 (0.009) 0.668 (0.009) 0.675 (0.009) 0.664 (0.02) 0.669 0.8 (0.02) 0.698 (0.02) 0.701 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 1.2200 1.1900 (0.06) 1.1800 1.6596
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] 16.03 (0.06) 15.98 (0.07) 15.98 (0.07) 15.98 (0.07) 16.03 16.03 (0.06) 15.98 (0.07)
Distance [pc] 62.38 (0.2) 62.58 (0.3) 62.58 (0.3) 62.58 (0.3) 62.38 62.38 (0.2) 62.58 (0.3)
Composition H H H H H
Proper motion (right ascension) [mas/yr] 18.97137523 (0.06) 19.09318818 (0.1) 18.971 (0.06) 19.093 20.2
Proper motion (declination) [mas/yr] 55.94130275 (0.08) 56.36599149 (0.2) 55.941 (0.08) 56.366 56.5
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.00
V magnitude
R magnitude
I magnitude
J magnitude 16.59 (0.02) 16.51 (0.1) 16.51 (0.1)
H magnitude 16.36 (0.1) 16.36 (0.1)
K magnitude 15.73 (0.2) 15.73 (0.2)
u magnitude 17.49 (0.009) 17.48 (0.009) 17.49 (0.009) 17.49 (0.009) 17.51 (0.02) 17.50 17.48 (0.02)
g magnitude 17.06 (0.004) 17.07 (0.007) 17.08 (0.004) 17.08 (0.02) 17.08 17.07 (0.02)
r magnitude 17.03 (0.004) 17.05 (0.006) 17.04 (0.004) 17.04 (0.01) 17.03 17.03 (0.01)
i magnitude 17.08 (0.005) 17.09 (0.003) 17.06 (0.005) 17.11 (0.01) 17.10 17.09 (0.01)
z magnitude 17.18 (0.01) 17.18 (0.003) 17.17 (0.01) 17.18 (0.02) 17.18 17.16 (0.02)
G magnitude 16.98 (0.006) 17.00 16.98 16.98 (0.003) 17.00
BP magnitude 17.10 (0.006) 17.11 17.11
RP magnitude 16.77 (0.004) 16.77 16.77
Pan g magnitude 17.07 (0.006) 17.07 (0.007) 17.07 (0.007)
Pan r magnitude 17.05 (0.005) 17.05 (0.006) 17.05 (0.006)
Pan i magnitude 17.09 (0.002) 17.09 (0.003) 17.09 (0.003)
Pan z magnitude 17.18 (0.003) 17.18 (0.003) 17.18 (0.003)
Pan y magnitude 17.26 (0.007) 17.26 (0.008) 17.27 (0.008)
E(B-V) 0.008

* 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.