R Observatory: Metrics for astronomyengine version 0.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

astronomyengine

0.1.0Package record

R Bindings to the 'Astronomy Engine' C Library

0packages depend

1.9Kdownloads / year

27.6%test coverage

13/13flavors OK

Overview

About

Maintained by Mitchell O'Hara-WildCRAN page ↗GitHub ↗Issues ↗

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.

Changes in 0.1.0

Initial CRAN release of astronomyengine package

New features

R bindings to the Astronomy Engine C library, providing accurate astronomical calculations
Support for calculating positions of the Sun, Moon, and planets
Single-file header + source bundling of the Astronomy Engine C library for use by other R packages via LinkingTo
Accuracy of approximately ±1 arcminute based on the VSOP87 planetary model
Full support for location-based calculations based on longitude, latitude, and height
POSIXct time input for all functions with UTC timezone support

From NEWS.md in the release

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. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

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

Status changes

OK13 OK2026-09-08
ERROR12 OK, 1 ERROR2026-09-07
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK12 OK2026-04-25

Show 1 earlier changeHide 1 earlier change

WARNING13 OK, 1 WARNING2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.0

READMEYes · 471 wordsVignettesNoNEWSYes · 67% structured · mentions 0.1.0Citation fileNo

Help pages: 75 (1 internal)includes a package overview page
Examples that run: 100%74 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 99%
Help pages citing references: 0%

How these are measured

Downloads

1.9K

CRAN downloads in the past year

Rank #18,179 · ~5/day · ~161/mo

Releases R versions

Daily download trend is not available in this view yet.

21930 days

71890 days

1.9K1 year

Compare downloads with other packages →

Also on223 r2u30 autocran

How downloads are counted

Repository

mitchelloharawild/astronomyengine ↗Account: mitchelloharawild

2Stars

0Forks

0Open issues

0Open PRs

1Releases

32Commits

1Commit identities

32 commits · Last activity 2026-03-02 · 0% stars, 30d · Default branch at 0.1.0.9000, ahead of CRAN 0.1.0 (checked 2026-10-21)

Responsiveness

How these are sampled

PRs merged (all time): not measured
Median days to close, 50 most recently updated closed issues: 7
Median days to close, 50 most recently updated closed PRs: not measured

Stars over time

2026-03-05 · 12026-07-07 · 2

How these are measured

PracticesBeta

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

Checks run against github.com/mitchelloharawild/astronomyengine on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Governance and community (4)

Code of conductContributing guideIssue templatesSupport guide

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-03-02 · The repository has a site deploy workflow

CRAN release process (1)

cran-comments.md

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing astronomyengine adds 1 package (0 with compiled code, 298 KB of source tarballs). Heaviest: cpp11 298 KB.

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.

How these are counted

Code & Tests

People & History

People (2)

Mitchell O'Hara-Wild

Author, Maintainer since 0.1.0 (2026)

Don Cross

Author, Copyright holder

Author of the bundled Astronomy Engine C library

Releases (1)

R
R 4.6.0 released · 2026-04-24
0.1.0Latest
record
2026-02-27 · 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

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("astronomyengine")

Format

O'Hara-Wild, M., & Cross, D. (2026). astronomyengine: R Bindings to the 'Astronomy Engine' C Library (Version 0.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.astronomyengine

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for astronomyengine version 0.1.0 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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