Astronomical Almanac logo

Astronomical Almanac for iOS

By Igor Brovin Free

Developer's Description

The Astronomical Almanac application calculates the exact position of objects in the solar system, their sunrise and sunset for a given time and place. The time of the onset of the lunar phases and lunar days is also calculated.

To improve the accuracy of determining the location of the observer, geographical maps are used.

Calculations are made in the date range from 3000 BC. until 3000 A.D.

The program uses the Steve Moshier algorithms.

Designed for astronomical observations.

The following parameters are calculated for celestial objects:

- UT, TDT, Julian Day

- Sideral time, Delta T


- Longitude

- Latitude

- Radius vector

- Geocentric distance

- Elongation from the Sun

Visible geocentric:

- Longitude

- Zodiac

- Right ascension

- declination

- constellation


- J2000, Right Climb

- J2000 Declination

- B1950, right ascension

- B1950 Declination


- height

- Azimuth

- Right ascension

- declination


- Equatorial diameter

- Visible value

- phase


- time of light

- nutation

- Aberration

- Parallax

- sunrise

- Meridian

- sunset

- Visible time

Full Specifications

What's new in version 2.46


Release May 2, 2020
Date Added May 2, 2020
Version 2.46

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


Total Downloads 1
Downloads Last Week 0
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