GD 25

All names: 2MASS J02161636+3951255, CNS5 577, GD 25, J0216+3951, LSPM J0216+3951, WDJ021616.35+395125.41, 02162+3951, WD 0213+396, Gaia DR3 332820971434386432, USNO-B1.0 1298-00048652, LP 196-42, WD 0213+39, GJ 3144, TIC 186968081, LAMOST J021616.35+395125.4, PM J02162+3951, 1SWASP J021616.34+395125.5, GEN# +6.10060025, NLTT 7475, Gaia DR2 332820971434386432, Gaia EDR3 332820971434386432, UCAC2 45609881, EGGR 312

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Gaia DR2 Bedard et al. 2017 Subasavage et al. 2017 Stilism Holberg et al. 2016 Guo et al. 2015 Limoges et al. 2015 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 02 16 16.13 (0.02) 02 16 16.14 (0.04) 02 16 16.14 (0.04) 02 16 16.36 02 16 16.32 02 16 16.13 02 16 16.35 (0.02) 02 16 16.14 02 16 17.57
Declination 39 51 23.86 (0.02) 39 51 23.91 (0.03) 39 51 23.91 (0.03) 39 51 02.04 39 51 25.20 39 51 23.86 39 51 25.41 (0.02) 39 51 23.91 39 51 29.88
Spectral type DA DA DA DA DA DA DA DA DA5.4 DA DA DA DA5.4 DA6
Effective temperature [K] 9203.0 (92) 8977.0 (26) 9113.6 (42) 9228.0 (134) 9000.0 (210) 9305.0 (135) 29562.0 (310) 9230.0 (133) 9374.0 (135) 9370.0 (135) 9344.0 9157.0 (51)
log(g) [cgs] 8.35 (0.02) 8.31 (0.003) 8.33 (0.01) 8.39 (0.05) 8.35 (0.04) 8.05 (0.05) 7.03 (0.07) 8.38 (0.05) 8.32 (0.05) 8.63 (0.05) 8.25 8.34 (0.008)
Mass [M] 0.819 (0.01) 0.79 (0.004) 0.87 (0.1) 0.82 (0.03) 0.63 (0.03) 0.33 (0.01) 0.84 (0.03) 0.8 (0.03) 1.0 (0.03) 0.816 (0.007)
log(Luminosity) [L] -3.22 (0.05) -3.20 -3.14
Cooling age [Gyr] 1.3200 1.3800 (0.2) 0.8300 1.1700
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-10.373
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] 49.20 (0.02) 49.20 (0.02) 49.08 (0.04) 49.08 (0.04) 49.08 (0.04) 50.75 (0.8) 49.20 49.20 (0.02) 49.08 (0.04)
Distance [pc] 20.33 (0.01) 20.33 (0.008) 20.37 (0.02) 20.38 (0.02) 20.38 (0.02) 19.70 (0.3) 19.70 (0.3) 22.99 (0.4) 19.60 (0.9) 20.90 (0.9) 16.00 20.33 20.33 (0.01) 20.38 (0.02)
Composition H H H H H H H
Proper motion (right ascension) [mas/yr] -158.6504923 (0.03) -158.7582475 (0.07) -158.65 (0.03) -158.7582475
Proper motion (declination) [mas/yr] -96.72623686 (0.03) -96.78171923 (0.07) -96.726 (0.03) -96.78171923
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.78 14.77
V magnitude 14.58 14.54 14.54
R magnitude 14.60
I magnitude 14.33
J magnitude 14.31 (0.004) 14.30 (0.03) 14.35 14.30 (0.03)
H magnitude 14.22 (0.05) 14.22 (0.05) 14.20 14.22 (0.05)
K magnitude 14.14 (0.05) 14.14 (0.05) 14.26 14.14 (0.05)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.54 (0.002) 14.55 14.55 14.54 14.54 (0.003) 14.55
BP magnitude 14.62 (0.002) 14.61 14.61
RP magnitude 14.39 (0.002) 14.39 14.39
Pan g magnitude 14.60 (0.003) 14.60 (0.003)
Pan r magnitude 14.61 (0.002) 14.61 (0.003)
Pan i magnitude 14.72 (0.003) 14.72 (0.003)
Pan z magnitude 14.83 (0.004) 14.83 (0.004)
Pan y magnitude 14.92 (0.001) 14.92 (0.002)
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.