SDSS J123908.24+550545.6

All names: SDSS J123908.24+550545.60, Gaia DR2 1571286366170496640, SDSS J123908.25+550545.4, SDSS J123908.24+550545.6, Gaia EDR3 1571286366170496640, Gaia DR3 1571286366170496640

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Simbad
Right ascension 12 39 08.25 (0.6) 12 39 08.25 12 39 08.25 (0.7) 12 39 08.25 (0.6)
Declination 55 05 45.44 (0.6) 55 05 45.49 55 05 45.44 (0.6) 55 05 45.49 (0.6)
Spectral type sdA: sdA: sdA: DA
Effective temperature [K] 7020.0 6994.0 7368.0 (237)
log(g) [cgs] 6.77 6.61 6.00 (1)
Mass [M] 0.147 0.096
log(Luminosity) [L]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 1.66 (0.8) 1.78 (1) 1.66 (0.8)
Distance [pc] 604.22 (289) 561.55 (323) 604.23 (289)
Composition
Proper motion (right ascension) [mas/yr] -0.490712152 (1) 0.866561044 (1) -0.491 (1)
Proper motion (declination) [mas/yr] -2.651109084 (0.9) -3.089307608 (1) -2.651 (0.9)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 21.39 (0.1) 21.39 (0.1) 21.39 (0.1)
g magnitude 20.75 (0.03) 20.75 (0.04) 20.74 (0.03)
r magnitude 20.55 (0.03) 20.58 (0.04) 20.54 (0.03)
i magnitude 20.56 (0.04) 20.58 (0.04) 20.56 (0.04)
z magnitude 20.61 (0.2) 20.63 (0.2) 20.61 (0.2)
G magnitude 20.63 (0.1) 20.71 20.63 (0.009)
BP magnitude 20.97 (0.1) 20.82
RP magnitude 20.24 (0.1) 20.14
Pan g magnitude 20.80 (0.03)
Pan r magnitude 20.60 (0.03)
Pan i magnitude 20.68 (0.02)
Pan z magnitude 20.58 (0.05)
Pan y magnitude 20.19 (0.1)
E(B-V) 0.019

* 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.