GJ 2147

All names: USNO-B1.0 0597-00910820, TIC 48938394, TYC 7441-1025-1, Gaia DR3 6749419923164242816, HIP 99438, L 565-18, 2MASS J20105686-3013064, L565-18, WD 2007-303, UCAC2 19292099, LTT 7987, WISEA J201056.57-301309.2, HIC 99438, CD-30 17706, GJ 2147, WDJ201056.85-301306.63, CNS5 5006, Gaia DR2 6749419923164242816, NLTT 48829, Gaia EDR3 6749419923164242816, LP 926-40, EC 20078-3022

Parameter Unit Gaia EDR3 O'Brien et al. 2024 Gaia DR2 Bedard et al. 2017 Tremblay et al. 2017 Stilism Holberg et al. 2016 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Koester et al. 2009 Holberg et al. 2008 Zuckerman et al. 2003 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 20 10 56.43 (0.03) 20 10 56.44 (0.04) 20 10 56.64 20 10 56.43 20 10 56.85 (0.03) 20 10 56.44 20 11 00.74
Declination -30 13 10.62 (0.02) -30 13 10.49 (0.03) -30 13 04.80 -30 13 10.62 -30 13 06.63 (0.02) -30 13 10.49 -30 13 03.36
Spectral type DA DA DA DA DA3.5 DA DA DA DA DA3.1 DA4
Effective temperature [K] 15124.0 (242) 16041.0 (233) 16150.0 (230) 16147.0 (233) 14454.0 16147.0 (233) 16150.0 (233) 15436.0 (9) 15267.0 15565.0 (114)
log(g) [cgs] 7.94 (0.02) 7.95 (0.04) 7.98 (0.04) 7.98 (0.04) 7.98 (0.04) 7.98 (0.04) 7.80 (0.002) 7.84 7.97 (0.006)
Mass [M] 0.579 (0.01) 0.55 (0.1) 0.61 (0.02) 0.6 (0.02) 0.6 (0.02) 0.598 (0.005)
log(Luminosity) [L] -1.97
Cooling age [Gyr] 0.1500 0.1500
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-8.838
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] 61.69 (0.03) 61.69 (0.03) 61.81 (0.05) 61.09 (5) 61.09 (5) 65.06 (4) 65.06 (3) 61.69 61.69 (0.03) 61.81 (0.05) 66.60 (4)
Distance [pc] 16.21 (0.008) 16.21 (0.008) 16.18 (0.01) 16.40 (1) 16.37 (1) 16.37 (1) 17.09 15.40 (0.6) 16.00 15.37 16.21 16.21 (0.008) 16.18 (0.01) 15.02 (0.9)
Composition H H H H
Proper motion (right ascension) [mas/yr] -340.8664868 (0.03) -340.722193 (0.08) -340.866 (0.03) -340.722193
Proper motion (declination) [mas/yr] -249.4228224 (0.02) -249.2781029 (0.06) -249.423 (0.02) -249.2781029
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 12.29
V magnitude 12.24 (0.01) 12.18 12.18 12.18 12.24
R magnitude 12.31
I magnitude 12.38
J magnitude 12.58 (0.02)
H magnitude 12.64 (0.03)
K magnitude 12.70 (0.03)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 12.26 (0.001) 12.27 12.26 12.26 (0.003) 12.27
BP magnitude 12.21 (0.001) 12.20 12.20
RP magnitude 12.37 (0.0004) 12.37 12.37
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.