GD 309

All names: Gaia DR2 859082970614616448, GD 309, SDSS 1124+595, WIRED J112652.44+591916.9, Gaia DR3 859082970614616448, PM J11268+5919, SDSS J112652.43+591917.0, 11268+5919, LSPM J1126+5919, WD 1124+595, USNO-B1.0 1493-00200610, SDSS J112652.44+591917.0, TIC 284566548, SDSS J112652.44+591916.9, J1126+5919, WDJ112652.39+591917.10, Gaia EDR3 859082970614616448, 2MASS J11265239+5919171, 1124+595, GALEX J112652.5+591917

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 Kilic et al. 2020 McCleery et al. 2020 Leggett et al. 2018 MWDD H Gaia DR2 Stilism Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Tremblay et al. 2011 Holberg et al. 2008 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 11 26 52.72 (0.02) 11 26 52.44 11 26 52.71 (0.02) 11 26 52.71 (0.02) 11 26 52.32 11 26 52.72 11 26 52.39 (0.02) 11 26 52.71 11 26 52.44 11 26 51.77 11 26 52.44
Declination 59 19 16.23 (0.02) 59 19 16.99 59 19 16.26 (0.03) 59 19 16.26 (0.03) 59 19 15.60 59 19 16.23 59 19 17.10 (0.02) 59 19 16.26 59 19 17.01 59 19 11.28 59 19 17.00
Spectral type DA DA DA DA DA DA4.9 DA DA DA4.8 DA DA DA DA DA DA4.7 DA DA DA DA DA
Effective temperature [K] 10364.0 (22) 10419.0 (104) 10419.0 (21) 10364.0 (22) 10458.8 (50) 10323.0 (316) 10389.0 10360.0 (160) 10747.0 10747.0 (156) 10750.0 (156) 10520.0 (20) 10407.0 (45) 10498.0 (15) 10355.0 (21)
log(g) [cgs] 8.63 (0.003) 8.63 (0.02) 8.64 (0.004) 8.63 (0.003) 8.65 (0.009) 8.62 (0.04) 8.64 8.69 (0.07) 8.60 (0.05) 8.88 (0.05) 8.91 (0.02) 8.64 (0.006) 9.00 (0.004) 8.86 (0.01)
Mass [M] 1.003 (0.003) 1.005 (0.01) 1.008 (0.003) 1.004 (0.003) 0.998 (0.03) 1.006 1.04 (0.04) 0.98 (0.03) 1.14 (0.02) 1.16 (0.01) 1.007 (0.005) 1.099 (0.005)
log(Luminosity) [L] -3.22 -3.09
Cooling age [Gyr] 1.8300 1.7310 (0.2) 1.7380 1.4700 2.2387
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
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] 39.33 (0.03) 39.33 (0.03) 39.36 (0.03) 39.36 (0.03) 39.30 (0.4) 39.36 (0.03) 39.33 39.33 (0.03) 39.36 (0.03)
Distance [pc] 25.43 (0.02) 25.43 (0.02) 25.41 (0.02) 25.41 (0.02) 25.45 (0.3) 25.41 (0.02) 24.00 (0.9) 25.00 27.60 (1) 21.00 17.90 25.43 25.43 (0.02) 25.41 (0.02)
Composition H H H H H H H H H
Proper motion (right ascension) [mas/yr] 156.2483145 (0.02) 156.2289394 (0.05) 156.248 (0.02) 156.229 158.5
Proper motion (declination) [mas/yr] -54.3782521 (0.03) -54.45050379 (0.05) -54.378 (0.03) -54.451 -54.3
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.50
V magnitude 15.13
R magnitude 14.80
I magnitude
J magnitude 15.05 (0.01) 15.05 (0.04)
H magnitude 15.18 (0.09) 15.18 (0.09)
K magnitude 15.10 (0.1) 15.10 (0.1)
u magnitude 15.45 (0.004) 15.44 (0.004) 15.45 (0.004) 15.45 (0.004) 15.40 (0.02) 15.40 15.46 (0.02)
g magnitude 15.11 (0.003) 15.11 (0.003) 15.11 (0.003) 15.13 (0.03) 15.13 15.15 (0.03)
r magnitude 15.21 (0.004) 15.21 (0.004) 15.21 (0.004) 15.18 (0.01) 15.20 (0.02)
i magnitude 15.33 (0.004) 15.33 (0.004) 15.33 (0.004) 15.29 (0.01) 15.32 (0.01)
z magnitude 15.51 (0.006) 15.51 (0.006) 15.51 (0.006) 15.45 (0.02) 15.50 (0.02)
G magnitude 15.12 (0.001) 15.14 15.14 15.12 15.12 (0.003) 15.14
BP magnitude 15.17 (0.001) 15.16 15.16
RP magnitude 15.05 (0.001) 15.06 15.06
Pan g magnitude 15.12 (0.0003) 15.12 (0.0003)
Pan r magnitude 15.22 (0.006) 15.21 (0.006)
Pan i magnitude 15.36 (0.002) 15.36 (0.002)
Pan z magnitude 15.52 (0.002) 15.52 (0.002)
Pan y magnitude 15.66 (0.005) 15.66 (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.