GJ 440

All names: TYC 8981-4417-1, L145-141, Ci 20 658, CNS5 2877, LTT 4364, WD 1142-645, HIC 57367, TIC 323485429, LHS 43, LLNS 6105, Gaia DR3 5332606522595645952, PM 11429-6434, EGGR 82, LAWD 37, L 145-141, UCAC4 126-052931, PLX 2716, BPM 7108, LS 2481, Gaia EDR3 5332606522595645952, GSC 08981-04418, WISEA J114547.32-645033.2, NLTT 28447, CSI-64-11431, UBV 10596, ALS 2481, UBV M 42331, uvby98 986145141, GJ 440, WG 20, WD 1141-64, HIP 57367, GEN# +9.86145141, J1145-6450, 2MASS J11454297-6450297, CSI-64-11430, WD 1142-64, Gaia DR1 5332606518269523072, PLX 2716.00, [L68] 74, AC2000 4195112, Zkh 167, Gaia DR2 5332606522595645952, LFT 844, GSC 08981-04417, WDJ114542.92-645029.46, GSC 08981-04378, LPM 396

Parameter Unit Gaia EDR3 O'Brien et al. 2024 Coutu et al. 2019 Gaia DR2 Subasavage et al. 2017 Tremblay et al. 2017 Stilism Holberg et al. 2016 Sion et al. 2014 Giammichele et al. 2012 Subasavage et al. 2009 Holberg et al. 2008 Dufour et al. 2005 Bergeron et al. 2001 Weidemann and Koester 1995 Koester et al. 1982a Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 11 45 49.60 (0.01) 11 45 42.92 11 45 49.39 (0.02) 11 45 42.93 11 45 49.92 11 45 42.93 11 45 49.60 11 45 42.92 (0.01) 11 45 49.39 11 45 21.98
Declination -64 50 34.99 (0.02) -64 50 29.46 -64 50 34.82 (0.03) -64 50 02.07 -64 50 27.60 -64 50 29.70 -64 50 34.99 -64 50 29.46 (0.02) -64 50 34.82 -64 50 10.32
Spectral type DQ DQ DQ DQ DQ DQ6.4 DQ DQ DQ DQ DQ DQ DQ DQ6
Effective temperature [K] 8062.0 (60) 7951.0 (351) 7880.0 (180) 7970.0 (220) 7972.0 (219) 7966.0 7966.0 (219) 7920.0 (220) 7900.0 (220) 8490.0 (270) 7800.0 7800.0 (200) 7599.0 (17)
log(g) [cgs] 8.06 (0.02) 8.01 8.04 (0.03) 7.88 (0.02) 8.06 (0.02) 8.07 (0.01) 8.07 (0.02) 8.27 (0.05) 7.92 (0.003)
Mass [M] 0.612 (0.01) 0.5808 0.6 (0.02) 0.61 (0.01) 0.61 (0.01) 0.62 (0.01) 0.62 (0.01) 0.75 (0.03) 0.46 (0.06) 0.527 (0.003)
log(Luminosity) [L] -3.28 (0.05) -3.27 -3.29 (0.01) -3.28 (0.02)
Cooling age [Gyr] 1.1400 1.2100 (0.09) 1.2900 1.2900 1.3200 (0.01) 1.4400 (0.1)
log(H/He)
log(C/He) -5.5031 (0.03) -5.18 -5.09 -5.14 (0.2) -5.4 -5.4
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] 215.68 (0.02) 215.68 (0.02) 215.74 215.74 (0.03) 215.86 (0.3) 215.78 (0.4) 216.12 (1) 216.40 (2) 216.12 (1) 216.51 (2) 218.30 (7) 0.20 215.68 215.68 (0.02) 215.74 (0.03) 218.50 (5)
Distance [pc] 4.64 (0.0004) 4.64 (0.0004) 4.64 (0.0007) 4.64 (0.0007) 4.63 (0.006) 4.63 (0.009) 4.63 (0.02) 4.62 4.62 (0.04) 4.63 (0.02) 4.62 4.58 (0.1) 4926.11 4.64 4.64 (0.0004) 4.64 (0.0007) 4.58 (0.1)
Composition He He He He He H He He He
Proper motion (right ascension) [mas/yr] 2661.639592 (0.02) 2661.594499 (0.05) 2661.64 (0.02) 2661.594499
Proper motion (declination) [mas/yr] -344.9325076 (0.02) -344.8467751 (0.05) -344.933 (0.02) -344.8467751
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude 11.66 11.66 11.72
V magnitude 11.50 11.51 (0.01) 11.50 11.49 11.49 11.51
R magnitude 11.34 11.33 11.33 11.34
I magnitude 11.20 11.20 11.20 11.16
J magnitude 11.19 (0.02) 11.19 11.18 (0.01) 11.19 11.19 (0.02)
H magnitude 11.13 (0.03) 11.12 11.13 (0.04) 11.12 11.13 (0.03)
K magnitude 11.10 (0.03) 11.09 11.10 (0.03) 11.09 11.10 (0.03)
u magnitude
g magnitude 11.54 (0)
r magnitude 11.53 (0.06)
i magnitude 11.57 (0.07)
z magnitude
G magnitude 11.42 (0.0004) 11.43 11.41 (0.002) 11.42 11.42 (0.003) 11.43
BP magnitude 11.52 (0.0005) 11.51 11.51
RP magnitude 11.23 (0.0003) 11.24 11.24
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.000

* 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.