GJ 4165

All names: PM J20491+3728, G 210-36, LTT 16093, L 1576-43, WD 2047+372, CNS5 5142, 1SWASP J204906.71+372813.2, Gaia DR3 1871118140493076224, GAT 1380, 20491+3728, G210-036, UCAC2 44898612, WD 2047+37, Gaia DR2 1871118140493076224, Gaia EDR3 1871118140493076224, LSPM J2049+3728, WDJ204906.70+372814.05, LP 284-13, G210-36, NLTT 49959, GCRV 21707, GJ 4165, EGGR 261, USNO-B1.0 1274-00529653, 2MASS J20490668+3728138, TIC 194154544

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 McCleery et al. 2020 Gaia DR2 Bedard et al. 2017 Subasavage et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Holberg et al. 2008 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 20 49 06.92 (0.01) 20 49 06.91 (0.03) 20 49 06.91 (0.03) 20 49 06.71 20 49 06.48 20 49 06.92 20 49 06.70 (0.01) 20 49 06.91 20 49 05.88
Declination 37 28 16.42 (0.02) 37 28 16.35 (0.03) 37 28 16.35 (0.03) 37 28 01.01 37 28 12.00 37 28 16.42 37 28 14.05 (0.02) 37 28 16.35 37 28 05.16
Spectral type DAP DAP DA DA DA DA DA3.6 DA DA DA DA DA3.4 DA4
Effective temperature [K] 14710.0 (200) 14709.8 (71) 14628.0 (279) 14600.0 (590) 14712.0 (286) 14600.0 (282) 14070.0 14712.0 (286) 14710.0 (285) 14629.0 (72)
log(g) [cgs] 8.30 (0.01) 8.30 (0.006) 8.33 (0.04) 8.33 (0.03) 8.31 (0.04) 8.32 (0.05) 8.31 (0.04) 8.31 (0.04) 8.30 (0.004)
Mass [M] 0.796 (0.01) 0.83 (0.09) 0.82 (0.02) 0.81 (0.03) 0.81 (0.03) 0.81 (0.03) 0.81 (0.03) 0.795 (0.003)
log(Luminosity) [L] -2.37 (0.07) -2.36 -2.34
Cooling age [Gyr] 0.3600 (0.05) 0.3700 0.3400
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] 56.86 (0.02) 56.86 (0.02) 56.90 (0.04) 56.90 (0.04) 58.49 (0.3) 57.87 (0.7) 57.80 (0.7) 57.87 (0.7) 56.86 56.86 (0.02) 56.90 (0.04) 55.00
Distance [pc] 17.59 (0.006) 17.59 (0.006) 17.57 (0.01) 17.57 (0.01) 17.10 (0.1) 17.10 (0.08) 17.28 (0.2) 17.30 (0.2) 17.28 17.30 (0.7) 17.00 17.77 17.59 17.59 (0.006) 17.57 (0.01) 18.18
Composition H H H H H H H
Proper motion (right ascension) [mas/yr] 162.1213259 (0.02) 162.0114124 (0.06) 162.121 (0.02) 162.0114124
Proper motion (declination) [mas/yr] 148.1422634 (0.02) 148.0516819 (0.06) 148.142 (0.02) 148.0516819
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 13.07 13.40
V magnitude 13.00 12.97 12.93
R magnitude 13.08 13.20
I magnitude 13.11
J magnitude 13.30 (0.02) 13.30 (0.02)
H magnitude 13.37 (0.02) 13.37 (0.02)
K magnitude 13.43 (0.04) 13.43 (0.04)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 13.04 (0.0007) 13.06 13.06 13.04 13.04 (0.003) 13.06
BP magnitude 13.01 (0.0007) 13.00 13.00
RP magnitude 13.13 (0.0006) 13.13 13.13
Pan g magnitude 13.05 (0.0003)
Pan r magnitude 13.20 (0.002)
Pan i magnitude 13.51 (0.04)
Pan z magnitude 13.70 (0.01)
Pan y magnitude 13.83 (0.002)
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.