SDSS J164414.69+205326.0

All names: SDSS J164414.69+205326.0, Gaia DR2 4564084964605970432, Gaia DR3 4564084964605970432, Gaia EDR3 4564084964605970432

Parameter Unit Gaia EDR3 SDSS DR12 MWDD H MWDD HE Gaia DR2 Simbad Eisenstein et al. 2006
Right ascension 16 44 14.69 (0.4) 16 44 14.69 16 44 14.69 (0.6) 16 44 14.69 (0.4) 16 44 14.69
Declination 20 53 26.01 (0.4) 20 53 26.07 20 53 26.01 (0.5) 20 53 26.03 (0.4) 20 53 26.04
Spectral type sdO: sdO: sdO SDO:
Effective temperature [K] 13388.0 15752.0 37361.0 (3213)
log(g) [cgs] 6.40 6.67 5.45 (0.3)
Mass [M☉] 0.15 0.186
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] -0.22 (0.5) -0.55 (0.8)
Distance [pc]
Composition
Proper motion (right ascension) [mas/yr] -3.761006358 (0.5) -2.056522436 (1) -3.761 (0.5)
Proper motion (declination) [mas/yr] -1.218328054 (0.5) -2.352319363 (1) -1.218 (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 19.81 (0.03) 19.80 (0.04) 19.82 (0.04)
g magnitude 20.14 (0.02) 20.14 (0.02) 20.14 (0.02)
r magnitude 20.59 (0.03) 20.59 (0.03) 20.59 (0.03)
i magnitude 20.97 (0.05) 20.97 (0.05) 20.96 (0.05)
z magnitude 20.60 (0.2) 20.54 (0.2) 20.42 (0.1)
G magnitude 20.37 (0.07) 20.45 20.37 (0.006)
BP magnitude 20.18 (0.07) 20.11
RP magnitude 20.34 (0.1) 20.63
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V)

* 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.