GJ 4236

All names: WD 2151-015, L 1003-16, GJ 4236, EGGR 151, GALEX J215406.4-011709, UBV 18745, CSI-01-21515, USNO-B1.0 0887-00602487, G 93-53, Gaia DR2 2679976510857026048, NLTT 52377, 2MASS J21540644-0117102, GEN# +9.80093053, WD 2151-01, LP 638-58, UBV M 42380, TIC 241057006, WISEA J215406.43-011713.1, Gaia EDR3 2679976510857026048, GCRV 72581, 2151-015, Gaia DR3 2679976510857026048, G93-53, LTT 8747, SDSS J215406.47-011711.8, WDJ215406.45-011709.55

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Leggett et al. 2018 MWDD H Gaia DR2 Stilism Holberg et al. 2016 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Zuckerman et al. 2003 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 21 54 06.46 (0.1) 21 54 06.46 (0.1) 21 54 06.24 21 54 06.46 21 54 06.45 (0.1) 21 54 06.46 21 54 04.63
Declination -01 17 13.71 (0.1) -01 17 13.58 (0.1) -01 17 06.00 -01 17 13.71 -01 17 09.53 (0.1) -01 17 13.58 -01 16 48.00
Spectral type DA DA DA DA DA6 DA DA DA DA5.5 DA
Effective temperature [K] 8052.0 (42) 6626.0 8504.0 (300) 8400.0 9194.0 (133) 9190.0 (133) 7656.0 7720.0 (67)
log(g) [cgs] 7.63 (0.01) 7.06 8.15 (0.06) 7.97 (0.06) 8.28 (0.06) 7.80 7.49 (0.02)
Mass [M] 0.402 (0.007) 0.208 0.69 (0.04) 0.58 (0.03) 0.77 (0.04) 0.34 (0.01)
log(Luminosity) [L] -2.96
Cooling age [Gyr] 0.7309 1.3500 0.7200
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-11.566
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] 39.18 (0.1) 39.18 (0.1) 39.53 (1) 39.23 (0.1) 39.18 39.18 (0.1) 39.23 (0.1)
Distance [pc] 25.52 (0.09) 25.52 (0.09) 25.30 (0.9) 25.49 (0.09) 19.85 (0.4) 19.60 24.50 (1) 20.00 25.52 25.52 (0.09) 25.49 (0.09)
Composition H H H H H
Proper motion (right ascension) [mas/yr] 9.127894974 (0.2) 6.827879052 (0.2) 9.128 (0.2) 6.827879052
Proper motion (declination) [mas/yr] -261.2989509 (0.2) -259.5861046 (0.2) -261.299 (0.2) -259.5861046
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS WDMS
B magnitude 14.73 (0.02)
V magnitude 14.52 14.41 14.52 (0.02)
R magnitude 14.37 (0.01)
I magnitude 13.99 (0.02)
J magnitude 12.45 (0.03)
H magnitude 11.78 (0.02)
K magnitude 11.41 (0.03)
u magnitude 15.18 (0.005)
g magnitude 14.71 (0.004)
r magnitude 14.62 (0.004)
i magnitude 14.52 (0.004)
z magnitude 14.22 (0.004)
G magnitude 14.49 (0.001) 14.49 14.49 14.49 (0.004) 14.49
BP magnitude 14.60 (0.001) 14.58 14.58
RP magnitude 14.07 (0.01) 14.09 14.09
Pan g magnitude 14.57 (0.002)
Pan r magnitude 14.59 (0.004)
Pan i magnitude 14.56 (0.004)
Pan z magnitude 14.53 (0.04)
Pan y magnitude 14.03 (0.02)
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.