SDSS J180314.30+240744.4

All names: Gaia DR2 4579319419762834688, Gaia EDR3 4579319419762834688, SDSS J180314.30+240744.4, Gaia DR3 4579319419762834688

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H MWDD HE Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 18 03 14.31 (0.2) 18 03 14.30 18 03 14.31 (0.3) 18 03 14.30 (0.2) 18 03 14.30
Declination 24 07 43.38 (0.3) 24 07 44.43 24 07 43.43 (0.4) 24 07 44.84 (0.3) 24 07 44.41
Spectral type DC DC DC DC DA
Effective temperature [K] 5375.0 5083.0 6308.0 (14)
log(g) [cgs] 8.13 7.94 9.16 (0.6)
Mass [M☉] 0.665 0.535
log(Luminosity) [L☉]
Cooling age [Gyr] 5.1500 4.9560
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 8.46 (0.4) 8.13 (0.5) 8.46 (0.4)
Distance [pc] 118.25 (6) 123.06 (7) 118.25 (6)
Composition
Proper motion (right ascension) [mas/yr] 8.699320291 (0.3) 8.316685718 (0.7) 8.699 (0.3)
Proper motion (declination) [mas/yr] -91.19917139 (0.4) -89.20463306 (1) -91.199 (0.4)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 22.01 (0.2) 22.01 (0.2) 21.94 (0.2)
g magnitude 20.66 (0.03) 20.66 (0.03) 20.70 (0.02)
r magnitude 20.05 (0.02) 20.05 (0.02) 20.07 (0.02)
i magnitude 19.86 (0.03) 19.86 (0.03) 19.85 (0.02)
z magnitude 19.52 (0.08) 19.52 (0.08) 19.55 (0.08)
G magnitude 20.13 (0.07) 20.19 20.13 (0.005)
BP magnitude 20.53 (0.07) 20.34
RP magnitude 19.59 (0.06) 19.54
Pan g magnitude 20.61 (0.03)
Pan r magnitude 20.12 (0.009)
Pan i magnitude 19.96 (0.01)
Pan z magnitude 19.79 (0.03)
Pan y magnitude 19.94 (0.06)
E(B-V) 0.034

* 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.