equatorial

observerly’s lightweight, zero-dependency, fully tree-shakeable, type-safe astrometry library for TypeScript. Sun, Moon, planet and satellite (SGP4) positions, IAU 2006/2000A apparent places, ICRS, ecliptic, galactic and horizontal frame transformations, and transit times, conformance-tested against ERFA (IAU SOFA) to the milliarcsecond.

equatorial mount stepper motor controller with GPS high precision star-, moon- and sun-tracking, Skysafari server for GOTO and Webinterface for stepper motor settings on an ESP32 microcontroller

Astronomical space coordinate and time conversion. Calculate Julian day, local sidereal time and ecliptic obliquity with great precision.

A modified version of rDUINOScope that works with Adafruit 3.5" 320X480 TFT SPI mode, Updated to the latest firmware version V_2.3.1.

rDUINOScope - Arduino based telescope control system (GOTO) fork - ILI9488 version

Motorized equatorial camera mount.

Telescope GOTO/Tracking system with steppers motors for equatorial mounts

Control your telescope wirelessly with ESP8266

Stepper motor driver for German equatorial mounts

Greater Equatorial Student's Association

my private linux iOptronmount commander

Source code and operating manual for a system that uses the Earth’s gravity to point telescopes at stars. It works on PushTo or GoTo equatorial mounts - uses an Android mobile phone App and a couple of stick-on sensors - cost is about AU$100 - assembly time is about half an hour using scissors and a screwdriver.

Vertical structure of 7-day period inertial-gravity waves in the equatorial Pacific