WD 1939+662

All names: Gaia DR2 2248748668919802496, WDJ193955.83+661856.08, WD 1939+662, NLTT 48121, 2MASS J19395587+6618562, USNO-B1.0 1563-00186868, EGGR 497, J1939+6619, LSPM J1939+6618, TIC 264218911, Gaia DR3 2248748668919802496, Gaia EDR3 2248748668919802496, LP 73-52

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Tremblay et al. 2020 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 19 39 56.04 (0.08) 19 39 56.04 (0.1) 19 39 56.04 (0.1) 19 39 56.04 19 39 55.83 (0.08) 19 39 56.04 19 40 09.72
Declination 66 19 01.96 (0.07) 66 19 01.78 (0.09) 66 19 01.78 (0.09) 66 19 01.96 66 18 56.08 (0.07) 66 19 01.78 66 22 51.60
Spectral type DC DC DC DC DA: DC DZ?9
Effective temperature [K] 5122.0 (47) 4899.0 (20) 5074.1 (39) 5070.0 (40) 5216.0 4906.0 5275.0 (39)
log(g) [cgs] 8.15 (0.03) 8.02 (0.01) 8.14 (0.03) 8.14 (0.03) 8.22 8.02 8.25 (0.02)
Mass [M] 0.665 (0.02) 0.58 (0.009) 0.72 0.583 0.741 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 6.2100 6.7870 5.9810
log(H/He)
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] 28.41 (0.08) 28.41 (0.08) 28.27 (0.1) 28.27 (0.1) 28.27 (0.1) 28.41 28.41 (0.08) 28.27 (0.1)
Distance [pc] 35.20 (0.1) 35.20 (0.1) 35.37 (0.1) 35.38 (0.1) 35.38 (0.1) 35.20 35.20 (0.1) 35.38 (0.1)
Composition He He
Proper motion (right ascension) [mas/yr] 81.29836172 (0.1) 81.358 (0.2) 81.298 (0.1) 81.35776724
Proper motion (declination) [mas/yr] 367.5602844 (0.09) 367.697 (0.2) 367.56 (0.09) 367.6974163
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.40
V magnitude
R magnitude 17.50
I magnitude
J magnitude 16.52 (0.1) 16.52 (0.1)
H magnitude
K magnitude 15.74 (0.2) 15.74 (0.2)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 17.70 (0.01) 17.73 17.73 17.70 17.70 (0.003) 17.73
BP magnitude 18.14 (0.01) 18.18 18.18
RP magnitude 17.11 (0.005) 17.11 17.11
Pan g magnitude 18.22 (0.008) 18.22 (0.008)
Pan r magnitude 17.68 (0.002) 17.68 (0.002)
Pan i magnitude 17.46 (0.006) 17.46 (0.006)
Pan z magnitude 17.39 (0.005) 17.39 (0.006)
Pan y magnitude 17.36 (0.004) 17.36 (0.005)
E(B-V) 0.003

* 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.