Highlighting Patek Philippe’s great tradition of astronomical watches, the Celestial devotes its dial to a rotating chart of the heavenly bodies. At any time, its owner may admire the exact configuration of the nocturnal sky in the northern hemisphere, with the apparent movement of the stars and the phases and orbit of the moon. Two skeletonized hands point to the hours and minutes of mean solar time. An Ellipse, deposited on the underside of the sapphire glass, frames the portion of the sky visible from Geneva and all other cities located at the same latitude.
Watch
Self-winding mechanical movement. 
Caliber: 20 LU CL C.
Date by hand. 
Hours and minutes of mean solar time. 
Sky chart, phases and orbit of the Moon. 
Time of meridian passage of Sirius and of the moon.
Dial : Black sapphire-crystal disks for sky background and moon phases. 
Transparent sapphire-crystal disk for sky chart and Milky Way.
Case : Rose gold. 
Case diameter: 44 mm. 
Height: 10.58 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Strap : Alligator strap with square scales, shiny black. 
Fold-over clasp.
Celestial with date. 
Diameter: 38 mm. 
Thickness: 6.81 mm. 
Number of parts: 315. 
Bridges: 12. 
Jewels: 45. 
Power reserve: min. 38 hours, max. 48 hours. 
22K gold off-center mini-rotor. 
Balance: Gyromax®. 
Vibrations/hour: 21 600 (3 Hz). 
Balance spring: Spiromax®. 
Hallmark: Patek Philippe Seal. 
Patent: CH 595 653.