WD 2304+137

All names: SDSS J230722.35+140046.1, Gaia EDR3 2815415285174565248, Gaia DR3 2815415285174565248, SDSS J230722.35+140046.2, Gaia DR2 2815415285174565248, WDJ230722.37+140046.23, WD 2304+137, J2307+1400

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Vincent et al. 2023
Right ascension 23 07 22.24 (0.2) 23 07 22.35 23 07 22.24 (0.3) 23 07 22.24 23 07 22.37 (0.2) 23 07 22.24 23 07 21.94
Declination 14 00 45.62 (0.2) 14 00 46.15 14 00 45.64 (0.2) 14 00 45.62 14 00 46.22 (0.2) 14 00 45.64 14 00 44.64
Spectral type DC DC D D DA DC ___8.5 DA
Effective temperature [K] 5603.0 (44) 5484.0 (40) 5854.0 5605.0 5937.0 (168)
log(g) [cgs] 7.89 (0.03) 7.81 (0.04) 8.05 7.90 8.12 (0.06)
Mass [M☉] 0.508 (0.02) 0.462 (0.03) 0.62 0.51 0.658 (0.05)
log(Luminosity) [L☉]
Cooling age [Gyr] 2.8000 2.7290 2.8180
log(H/He)
log(C/He)
log(Ca/He)
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] 12.18 (0.2) 12.20 (0.3) 12.20 (0.3) 12.18 12.18 (0.2) 12.20 (0.3)
Distance [pc] 82.08 (2) 81.97 (2) 81.99 (2) 82.08 82.08 (2) 81.99 (2)
Composition He He
Proper motion (right ascension) [mas/yr] -120.6346108 (0.2) -120.5580537 (0.6) -120.635 (0.2) -120.5580537
Proper motion (declination) [mas/yr] -37.66562961 (0.2) -38.08866954 (0.4) -37.666 (0.2) -38.08866954
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.82 (0.04) 17.82 (0.04)
H magnitude 17.46 (0.04) 17.46 (0.04)
K magnitude 17.48 (0.05) 17.48 (0.05)
u magnitude 20.11 (0.04) 20.09 (0.04) 20.11 (0.04) 20.11 (0.04) 20.07
g magnitude 19.17 (0.01) 19.17 (0.01) 19.17 (0.01) 19.18
r magnitude 18.75 (0.01) 18.74 (0.01) 18.74 (0.01) 18.73
i magnitude 18.60 (0.01) 18.59 (0.01) 18.59 (0.01) 18.59
z magnitude 18.55 (0.03) 18.53 (0.03) 18.53 (0.03) 18.59
G magnitude 18.77 (0.03) 18.80 18.77 18.77 (0.004) 18.80
BP magnitude 19.17 (0.03) 19.06 19.06
RP magnitude 18.37 (0.02) 18.26 18.26
Pan g magnitude 19.13 (0.009) 19.13 (0.01)
Pan r magnitude 18.76 (0.006) 18.76 (0.004)
Pan i magnitude 18.63 (0.006) 18.63 (0.006)
Pan z magnitude 18.61 (0.009) 18.61 (0.008)
Pan y magnitude 18.59 (0.03) 18.59 (0.04)
E(B-V) 0.008

* 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.