====== Patek Philippe Sky Moon 5102 ======
{{wst>image_cr|Patek Philippe|Sky Moon Ref. 5102}}

**Sky Moon Ref. 5102** is an [[astronomical watch]] by [[Patek Philippe]].

This extravagant luxury watch with [[self-winding]] movement shows a detailed view of the northern night sky in its uniform rotation, the angular motion of the moon and the [[moon phase]], while a golden ellipse frames that part of the sky, which can be seen above the city of [[Geneva]]. On the 12-hour scale the hours and minutes for [[mean solar time]] are displayed at the periphery.

The [[movement]] consists of 301 components and has as a basis the same mechanism which was originally developed by Patek Philippe for the [[pocket watch]] [[Patek Philippe Star Calibre 2000|Star Calibre 2000]] and then was further miniaturized for the model [[Patek Philippe Sky Moon Tourbillon Ref 5002|Sky Moon Tourbillon]].

[[Patek Philippe]] won the "Aiguille d'Or" Grand Prix at the [[Grand Prix d'Horlogerie de Genève]] for the Ref. 5102 Ciel Lune in November, [[2002]].

{{wst>image_cr|Patek Philippe|Sky Moon Ref. 5102 Werkaufbau|Patek Philippe Sky Moon Ref. 5102 movement design}}


<WRAP ud ud_mod>

**Movement:**
  * [[Self-winding]] [[manufacture]] movement Calibre 240 CL LU (240/165), 21,600 A/h
  * [[Microrotor]] in 22ct gold, unidirectional winding
  * 45 [[jewels]]
  * Gyromax balance
  * [[Breguet hairspring]]
  * Stud movable
  * [[Geneva Seal]]
  * 301 components
  * Power reserve ca. 48 hours

**Case:**
  * 18ct [[white gold]], middle section with decoration of half Calatrava Crosses
  * D 43.1 mm, H 9.78 mm
  * [[Sapphire crystal]]
  * [[Sapphire crystal]] caseback
  * [[Waterproof]] to 30 m

**Dial:**
  * Three metallized [[sapphire crystal]] discs
  * Sapphire cover glass with metallized Roman numerals from I to XII on the inside
  * Elliptical contour as limiting of the part of the sky visible from [[Geneva]]
  * Hours and minutes hands [[skeletonized]] Feuille hands, gold, white lacquered

**Functions:**
  * Hours, Minutes of [[mean solar time]]
  * Star map, time of meridian passage of Sirius
  * Time of meridian passage of the moon
  * Angular movement of the moon and [[moon phase]]s

**Bracelet:**
  * Hand-sewn crocodile leather
  * 18 mm [[tang-type buckle]] in 18ct [[white gold]]
</WRAP>

{{tag>Watch_models Astronomical_watches Patek_Philippe_models Patek_Philippe_references}}