Watch Wiki

The Best Watches and Watch Brands

User Tools

Site Tools


sidereal

Sidereal

[[Patek Philippe Sky Moon Tourbillon Ref. 5002]],\\ with (among others) display of the **sidereal time** (click to enlarge!)
Patek Philippe Sky Moon Tourbillon Ref. 5002,
with (among others) display of the sidereal time
© Patek Philippe

Sidereal time measures the earth's movement relative to fixed stars rather than the sun.

Similar to solar time, sidereal time measures the earth's movement rather than a fixed increment of seconds. A mean sidereal day is 23 hours, 56 minutes, 4.0916 seconds, slightly shorter than a mean solar day.

Watches that measure sidereal time generally use a full sub-dial with hour and minute hands on a 24-hour scale. In contrast, solar time is generally displayed with an arrow, since it varies more or less than the calculated length of a day.

sidereal.txt · Last modified: 03.07.2022 15:38 by 127.0.0.1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki

© Watch Wiki. All texts are protected by copyright. The respective copyright holders are the signatories of the contributions. For details see Impressum. Regarding objections and complaints (copyright and other rights) also see there. Impressum | Privacy Policy | Copyright | About Watch Wiki