SDSS J193806.45+631521.4

All names: Gaia EDR3 2241844801047945216, SDSS J193806.45+631521.4, Gaia DR3 2241844801047945216, Gaia DR2 2241844801047945216

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 19 38 06.47 (0.3) 19 38 06.45 19 38 06.47 (0.4) 19 38 06.47 19 38 06.43 (0.3) 19 38 06.45
Declination 63 15 22.91 (0.3) 63 15 21.40 63 15 22.83 (0.5) 63 15 22.91 63 15 20.42 (0.3) 63 15 21.41
Spectral type DC DC DA DC DC DA
Effective temperature [K] 4739.0 4436.0 4767.0 (163) 6303.0 (7)
log(g) [cgs] 7.23 6.98 7.13 (0.1) 9.48 (0.4)
Mass [M☉] 0.23 0.154 0.201 (0.06)
log(Luminosity) [L☉]
Cooling age [Gyr] 2.0770
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 6.79 (0.3) 7.13 (0.4) 6.79 6.79 (0.3)
Distance [pc] 147.21 (7) 140.30 (8) 147.21 147.21 (7)
Composition
Proper motion (right ascension) [mas/yr] 20.31018896 (0.5) 20.62555925 (0.9) 20.31 (0.5)
Proper motion (declination) [mas/yr] 155.3319655 (0.5) 155.4452677 (1) 155.332 (0.5)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 22.37 (0.3) 22.33 (0.3) 22.33 (0.3)
g magnitude 20.75 (0.03) 20.74 (0.02) 20.74 (0.02)
r magnitude 19.93 (0.02) 19.92 (0.02) 19.92 (0.02)
i magnitude 19.63 (0.02) 19.64 (0.02) 19.64 (0.02)
z magnitude 19.48 (0.06) 19.51 (0.06) 19.51 (0.06)
G magnitude 19.96 (0.06) 20.02 19.96 19.96 (0.005)
BP magnitude 20.47 (0.06) 20.53
RP magnitude 19.31 (0.03) 19.32
Pan g magnitude 20.63 (0.02)
Pan r magnitude 19.92 (0.01)
Pan i magnitude 19.63 (0.005)
Pan z magnitude 19.57 (0.03)
Pan y magnitude 19.42 (0.04)
E(B-V) 0.013

* 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.