ASTRO II Constellation Watch - An astronomical watch with a manually rotated planisphere / constellation disc. 42mm case size. Constellation display of the entire sky at 35 deg. North Latitude / North Hemisphere.

Compare the features of this WatchDesign celestial sphere watch to Astrodea and other celestial watches. Those other watches sell for over $1,000! (and over $90,000 for mechanical versions!). All the looks and functionality for a fraction of the price! Brand new with 12 month warranty.The ASTRO watch is the perfect thing for anyone interested in Space, Science, Astronomy and the night sky. This watch is designed for the night sky of the Northern Hemisphere.

This quartz analog watch displays a wealth of data - Current time, Dial can be aligned to the current positions of the constellations (set the planisphere disc via the crown at 3-o-clock), once the disc is correctly set you can also read the azimuth and altitude of the major fixed stars, nebulae and star clusters, local sidereal time, stellar spectral type, pole star hour angle, hours for astronomical twilight and other functions useful for astronomical observing. These is a lot of data on the dial - so a magnification loupe is helpful to discern all the various stars, nebuale, clusters and constellations.

Almost all of the celestial sphere (approximately 98.6%) visible at 35deg. north latitude is displayed.Because distortion is minimal in the northern hemisphere, approximately 98.6% of the celestial sphere visible at 35deg. north latitude is displayed on the constellation dial. (The range shown on the constellation dial: –55.57deg. to +77.06deg. declination.)The constellation display includes the positions of 1,056 fixed stars with a brightness of 4.8 magnitude or brighter, 169 major nebulae and star clusters, delimitation of constellations, the ecliptic and celestial equator based on their positions for the year 2000.0. (Maximum magnitude values are indicated for variable stars. Fixed stars are represented by a four-color spectrum at 0.1 magnitude intervals.)

The position of the sun is shown in a broken line along the ecliptic (the sun's apparent path on the celestial sphere during the year) on the 1st, 11th, and 21st of each month (for 12:00 noon Universal Time over the mean year). Times for sunrise and sunset as well as the number of daylight hours can be determined by examining the horizon line on the crystal underprint.  Local sidereal time can be designated by reading the right ascension graduations on the constellation dial that intersect with the meridian on the transparent dial. The hour angle display of the pole star lets you align an astronomical telescope to the polar axis.

Quality throughout:

 - 100% Japan quartz movement (made by Citizen)

 - 42mm stainless steel case (steel is high quality surgical grade 316L with a high polish - will last a lifetime)

 - 37mm planisphere dial - rotated via the crown at 3-o-clock

 - 20mm black silicone rubber strap with heavy duty stainless steel buckle

 - 3 ATM water resistance

 - Beautiful, reusable gift box

 - Brand new in box. Full 12 month manufacturer's warranty (serviced from USA). ENGLISH language instructions

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