BD+18 2647

All names: TYC 1446-2473-1, UBV 9577, [BFA97] 162, FAUST 3385, GSC 01446-00791, [VKN2011] J124151.8+173119, PLX 2925.01, HIP 61958, uvby98 001802647, FAUST NGP-64, Feige 67, HIC 61958, PG 1239+178, UBV 11386, BD+18 2647, TD1 30996, UBV M 43322, Gaia EDR3 3935488605023787392, Gaia DR2 3935488605023787392, GEN# +0.01802647, [TFW97] J124151.79+173119.93, Gaia DR3 3935488605023787392, Feige67, GALEX J124151.8+173118, TIC 460815638, FB 106, GSC 01446-02473, UBV M 895, 2MASS J12415179+1731197

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 12 41 51.78 (0.05) 12 41 51.78 12 41 51.79 (0.05)
Declination 17 31 19.15 (0.03) 17 31 21.38 17 31 19.75 (0.03)
Spectral type sdO sdOpec
Effective temperature [K] 61114.0 (318)
log(g) [cgs] 5.92 (0.01)
Mass [M]
log(Luminosity) [L]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 2.91 (0.07) 3.26 (0.09) 2.91 (0.07)
Distance [pc] 343.06 (9) 306.61 (9) 343.06 (9)
Composition
Proper motion (right ascension) [mas/yr] -7.17 (0.09) -7.327 (0.2) -7.17 (0.09)
Proper motion (declination) [mas/yr] -37.278 (0.09) -37.281 (0.1) -37.278 (0.09)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 11.70 (0.08)
V magnitude 11.63 (0.1)
R magnitude 11.97
I magnitude 12.16
J magnitude 12.50 (0.02) 12.50 (0.02)
H magnitude 12.70 (0.03) 12.70 (0.03)
K magnitude 12.75 (0.03) 12.75 (0.03)
u magnitude 11.58 (0.001)
g magnitude
r magnitude
i magnitude 12.50 (0.001)
z magnitude 13.93 (0.01)
G magnitude 11.75 (0.003) 11.77 (0.0008) 11.75 (0.003)
BP magnitude 11.57 (0.003) 11.52 (0.009)
RP magnitude 12.11 (0.004) 12.11 (0.002)
Pan g magnitude 11.54
Pan r magnitude 12.06
Pan i magnitude 12.43
Pan z magnitude 12.75
Pan y magnitude 12.95 (0.002)
E(B-V) 0.027

* 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.