Features & Capabilities

Using the U.S. Naval Observatory NOVAS library and solar system ephemerides from JPL, high precision positions can be calculated in real-time from 1900 to 2050.

Simply select date and time and all values are recalculated instantly. The estimated elevation value is only needed for calculating sunrise/sunset, twilight, and moonrise/moonset.

The app provides the following functionalities:

*Aries: GHA position

*Sun: -GHA/dec

  • Astronomical dawn, nautical dawn, civil dawn, sunrise, sunset, civil dusk, nautical dusk, astronomical dusk, and meridian passage at Greenwich.
  • Semidiameter
  • Sunlight world map with the Sun and the Moon position.

*Moon:

  • GHA/dec
  • Moonrise/moonset and meridian passage at Greenwich.
  • Semidiameter
  • Moon phase and age of the Moon.

*Planets:

  • GHA/dec for Venus, Mars, Jupiter, and Saturn.

*Stars:

  • Magnitude, SHA/dec of 99 stars ordered by SHA.

*Corrections:

  • Correction for the atmospheric refraction.
  • Correction for the dip of the horizon.
  • Parallax correction for the Moon, the Sun, Venus, and Mars.

User Growth & Download Statistics

App
By:
RPA Technologies
Version:
2.01 Last updated: 2025-02-10
Version code:
872346594
Creation date:
2019-10-10
Compatible devices:
Size:
122.79MB
Price:
9.99
URLs:
Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-10
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
RPA Technologies
Apple Apps Store
https://apps.apple.com/au/app/perpetual-nautical-almanac/id1483007345

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