SDSS J122934.83+443654.4

All names: SDSS J122934.83+443654.4, Gaia DR2 1541650232834768000, Gaia DR3 1541650232834768000, Gaia EDR3 1541650232834768000, GALEX J122934.8+443654, SDSS J122934.82+443654.4, SDSS J122934.83+443654.43

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 MWDD H MWDD HE Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 12 29 34.85 (0.07) 12 29 34.83 12 29 34.85 (0.08) 12 29 34.85 12 29 34.82 (0.07)
Declination 44 36 54.39 (0.1) 44 36 54.43 44 36 54.39 (0.1) 44 36 54.39 44 36 54.46 (0.1)
Spectral type DC: DC: DC: DC DC DC
Effective temperature [K] 9239.0 9244.0 9870.0 (510) 9109.0 (232)
log(g) [cgs] 7.64 7.58 6.50 (0.2) 7.49 (0.06)
Mass [M] 0.412 0.366 0.329 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.4913 0.4761
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 5.02 (0.1) 5.01 (0.2) 5.02 5.02 (0.1)
Distance [pc] 199.21 (5) 199.47 (7) 199.21 199.21 (5)
Composition
Proper motion (right ascension) [mas/yr] 20.45978971 (0.09) 20.71879431 (0.2) 20.46 (0.09)
Proper motion (declination) [mas/yr] -4.186365827 (0.1) -4.430935728 (0.3) -4.186 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.68 (0.02) 18.68 (0.02) 18.68 (0.02)
g magnitude 18.46 (0.007) 18.46 (0.01) 18.46 (0.007)
r magnitude 18.49 (0.008) 18.49 (0.01) 18.49 (0.008)
i magnitude 18.61 (0.01) 18.61 (0.01) 18.61 (0.01)
z magnitude 18.76 (0.03) 18.76 (0.03) 18.76 (0.03)
G magnitude 18.43 (0.01) 18.46 18.43 18.43 (0.003)
BP magnitude 18.50 (0.01) 18.48
RP magnitude 18.34 (0.02) 18.31
Pan g magnitude 18.48 (0.01)
Pan r magnitude 18.50 (0.008)
Pan i magnitude 18.63 (0.008)
Pan z magnitude 18.78 (0.01)
Pan y magnitude 18.84 (0.03)
E(B-V) 0.012

* 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.