GD 215

All names: EGGR 225, Gaia DR2 4280632829779587072, Gaia DR3 4280632829779587072, 2MASS J18432572+0420227, PLX 4317.05, CNS5 4643, J1843+0420, Gaia EDR3 4280632829779587072, GCRV 21697, GEN# +6.10060215, GJ 4072, WDJ184325.72+042022.83, TIC 110639468, 18434+0420, uvby98 610060215, WD 1840+042, USNO-B1.0 0943-00384592, PM J18434+0420, GD 215, WD 1840+04, USNO 556

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 MWDD H MWDD HE Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Gianninas et al. 2011 Koester et al. 2009 Zuckerman et al. 2003 Bergeron et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 18 43 25.58 (0.02) 18 43 25.59 (0.03) 18 43 25.59 (0.03) 18 43 25.68 18 43 25.58 18 43 25.72 (0.02) 18 43 25.59 18 43 25.82
Declination 04 20 23.93 (0.02) 04 20 23.90 (0.04) 04 20 23.90 (0.04) 04 20 20.40 04 20 23.93 04 20 22.83 (0.02) 04 20 23.90 04 20 21.48
Spectral type DA DA DA DA DA DA DA5.8 DA DA DA DA DA5.6 DA6
Effective temperature [K] 8797.0 (81) 8901.0 (40) 8807.1 (44) 8820.0 8596.0 8877.0 (128) 9030.0 (130) 8900.0 (127) 9090.0 9050.0 (130) 8769.0 (6) 8733.0 9090.0 (340) 8648.0 (51)
log(g) [cgs] 8.11 (0.02) 8.15 (0.006) 8.12 (0.01) 8.13 8.05 8.19 (0.05) 8.16 (0.05) 8.21 (0.05) 8.43 (0.05) 8.11 (0.008) 8.12 8.19 (0.1) 8.08 (0.01)
Mass [M] 0.663 (0.01) 0.69 (0.006) 0.678 0.606 0.77 (0.2) 0.7 (0.03) 0.73 (0.03) 0.88 (0.03) 0.71 (0.08) 0.643 (0.008)
log(Luminosity) [L] -3.15 -3.11 (0.08)
Cooling age [Gyr] 1.0500 1.0180 0.9845 1.1700 1.0200 (0.2)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-10.258
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] 40.19 (0.02) 40.19 (0.02) 40.21 (0.04) 40.21 (0.04) 40.21 (0.04) 40.20 (3) 40.00 (3) 40.20 (3) 40.19 40.19 (0.02) 40.21 (0.04) 40.30 (34)
Distance [pc] 24.88 (0.02) 24.88 (0.01) 24.87 (0.02) 24.87 (0.02) 24.87 (0.02) 24.80 (2) 24.88 (2) 25.00 (2) 24.87 21.00 24.88 (2) 24.88 24.88 (0.02) 24.87 (0.02) 24.81 (21)
Composition H H H H H H
Proper motion (right ascension) [mas/yr] -129.2125689 (0.03) -129.3329121 (0.07) -129.213 (0.03) -129.3329121
Proper motion (declination) [mas/yr] 68.68700738 (0.02) 68.76725894 (0.07) 68.687 (0.02) 68.76725894
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.01 15.06
V magnitude 16.35 14.92 14.79 14.92
R magnitude 14.66 14.20
I magnitude 14.52
J magnitude 14.44 (0.05) 14.45 14.53 14.44 (0.05)
H magnitude 14.37 (0.07) 14.54 14.46 14.37 (0.07)
K magnitude 14.65 (0.1) 14.59 14.50 14.65 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.75 (0.002) 14.77 14.77 14.75 14.75 (0.003) 14.77
BP magnitude 14.85 (0.002) 14.83 14.83
RP magnitude 14.57 (0.001) 14.58 14.58
Pan g magnitude 14.83 (0.003) 14.83 (0.003)
Pan r magnitude 14.84 (0.003) 14.84 (0.003)
Pan i magnitude 14.93 (0.002) 14.93 (0.002)
Pan z magnitude 15.04 (0.005) 15.04 (0.005)
Pan y magnitude 15.12 (0.005) 15.12 (0.005)
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.