astronomyengine

0.1.0

R Bindings to the 'Astronomy Engine' C Library

0packages depend

1.2Kdownloads / year

27.6%test coverage

13/13checks pass

Overview

About

Maintained by Mitchell O'Hara-WildFirst published 2026-02-271 releasesCRAN page ↗GitHub ↗

Provides access to the 'Astronomy Engine' C library (https://github.com/cosinekitty/astronomy) by Don Cross. The library calculates positions of the Sun, Moon, and planets, and predicts astronomical events such as rise/set times, lunar phases, equinoxes, solstices, eclipses, and transits. It is based on the 'VSOP87' planetary model and is accurate to within approximately one arcminute. This package bundles the single-file C source so that other R packages can link against it via 'LinkingTo' without shipping their own copy.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("astronomyengine", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("mitchelloharawild/astronomyengine")

Development version from mitchelloharawild/astronomyengine. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-astronomyengine

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-astronomyengine

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-astronomyengine

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 3.0 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 0.17

27.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
WARNING2026-03-10
13 OK · 0 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 471 wordsVignettesNopkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 99%
References docs: 0%

Downloads

1.2K

CRAN downloads in the past year

Rank #18,298 · ~3/day · ~98/mo

Releases R versions

Daily download trend is not available in this view yet.

21630 days

64690 days

1.2K1 year

Compare downloads with other packages →

Also on161 r2u32 autocran

Repository

GitHub ↗ mitchelloharawild/astronomyengine

2Stars

0Forks

0Open issues

0Open PRs

1Releases

32Commits

1Contributors

32 commits · Last activity 2026-03-02 · 0% stars, 30d

Stars over time

2026-03-05 · 12026-07-07 · 2

Repository practices

Upstream repositoryBeta

5 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/mitchelloharawild/astronomyengine on 2026-07-19.

Continuous integration (1)

GitHub Actions

CRAN release process (1)

cran-comments.md

Docs source (1)

README.Rmd

Governance and community (2)

Issue templatesSupport guide

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (0)

none

LinkingTo (1)

cpp11

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 3,557 (43%)Rd 2,801 (34%)C++ 1,840 (22%)C 2 (0%)

Code characteristics

Cyclomatic complexity: 1.0 median / 4 max
Test cases: 34 / 0.17 per code line

Test coverage

Line coverage

28%

Expression

27.9%

Tests / Examples

27.6% / 61% ex

Functions

322 78 exported

Complexity

1.1 avg / 4 max

Call network

322 nodes / 233 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

322 functions

Function	Cyclo	Coverage
astro_bary_state exp	1	0%
astro_combine_rotation exp	1	0%
astro_ecliptic exp	1	0%
astro_ecliptic_longitude exp	1	0%
astro_geo_vector exp	1	0%
astro_hour_angle exp	1	0%

People & History

People (2)

Maintainer (1)

Mitchell O'Hara-Wild

Author, Maintainer

Authors (2)

Mitchell O'Hara-Wild

Author, Maintainer

Don Cross

Author, Copyright holder

Don Cross

Author, Copyright holder

Package Timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
0.1.0Latest
2026-03-10 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2026-02-27
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Download size: 200 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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