GD 205

All names: GD205, GD 205, LSPM J1711+2301, 1709+230, TIC 356103067, WDJ171155.66+230101.53, USNO-B1.0 1130-00295242, WD 1709+230, SDSS J171155.66+230101.1, GEN# +6.10060205, 2MASS J17115565+2301019, uvby98 610060205, Gaia DR3 4568641929204497664, BPM 92077, SDSS J171155.66+230101.0, Gaia EDR3 4568641929204497664, Gaia DR2 4568641929204497664, GALEX J171155.7+230100, WD 1709+23, EGGR 224

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Leggett et al. 2018 MWDD HE Gaia DR2 Stilism Bergeron et al. 2011 Zuckerman et al. 2010 Farihi et al. 2010 Voss et al. 2007 Koester et al. 2005 Beauchamp et al. 1999 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 17 11 55.67 (0.01) 17 11 55.67 (0.02) 17 11 55.67 17 11 55.66 (0.01) 17 11 55.67 17 11 56.02
Declination 23 00 58.84 (0.02) 23 00 58.92 (0.03) 23 00 58.84 23 01 01.53 (0.02) 23 00 58.92 23 01 08.76
Spectral type DBAZ DBAZ2.5 DBA DBA DBAZ DBAZ DBAZ DB DB DBAZ DB4
Effective temperature [K] 19465.0 (234) 20287.0 (1552) 20383.0 19610.0 (507) 19250.0 18500.0 18527.0 19700.0 21000.0 20329.0 (220)
log(g) [cgs] 8.03 (0.009) 8.08 (0.06) 8.08 8.09 (0.06) 8.07 8.17 8.05 8.08 (0.008)
Mass [M] 0.614 (0.008) 0.646 (0.05) 0.648 0.65 (0.04) 0.65 0.635 0.643 (0.007)
log(Luminosity) [L] -1.71
Cooling age [Gyr] 0.0790 (0.03) 0.0782 0.0977 0.8800 0.1300 1.1770
log(H/He) -4.5 -4 (0.1) -4.4 -4.36 -4.2
log(C/He)
log(Ca/He) -7.9 -8.0 -8.0
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 15.24 (0.03) 15.24 (0.4) 15.22 (0.04) 15.24 15.24 (0.03) 15.22 (0.04)
Distance [pc] 65.61 (0.1) 65.62 (2) 65.72 (0.2) 65.00 65.61 65.61 (0.1) 65.72 (0.2)
Composition He He He He He
Proper motion (right ascension) [mas/yr] 10.42865822 (0.02) 10.3993253 (0.05) 10.429 (0.02) 10.3993253
Proper motion (declination) [mas/yr] -167.9467758 (0.03) -168.0366445 (0.06) -167.947 (0.03) -168.0366445
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.81
V magnitude 14.90 14.90 14.90
R magnitude 15.10
I magnitude
J magnitude 15.36 (0.05)
H magnitude 15.41 (0.08)
K magnitude 15.45 (0.2)
u magnitude 14.51 (0.004) 14.51 (0.003)
g magnitude 14.60 (0.004) 14.62 (0.003)
r magnitude 15.01 (0.004) 15.02 (0.003)
i magnitude 15.28 (0.004) 15.29 (0.003)
z magnitude 15.57 (0.006) 15.57 (0.006)
G magnitude 14.82 (0.001) 14.84 14.82 14.82 (0.003) 14.84
BP magnitude 14.73 (0.001) 14.69 14.69
RP magnitude 14.99 (0.001) 14.99 14.99
Pan g magnitude 14.69 (0.002)
Pan r magnitude 15.03 (0.003)
Pan i magnitude 15.32 (0.002)
Pan z magnitude 15.57 (0.002)
Pan y magnitude 15.76 (0.004)
E(B-V) 0.005

* 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.