Add #approaching_primary? and #receding_from_primary? to solar system bodies#211
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rhannequin merged 2 commits intomainfrom Sep 11, 2025
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Add #approaching_primary? and #receding_from_primary? to solar system bodies#211rhannequin merged 2 commits intomainfrom
#approaching_primary? and #receding_from_primary? to solar system bodies#211rhannequin merged 2 commits intomainfrom
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## 0.9.0 - 2025-10-31 _If you are upgrading: please see [UPGRADING.md]._ ### Features * Add `#approaching_primary?` and `#receding_from_primary?` to solar system bodies ([#211]) * Calculate apoapsis and periapsis events ([#213]) * Improve precision of ΔT ([#219]) * Deep Sky Object: Compute astrometric position ([#217]) * Deep Sky Object: Compute apparent position ([#220]) * Deep Sky Object: Handle velocities properly ([#222]) * Deep Sky Object: Compute topocentric position ([#226]) * Deep Sky Object: difference between the body and the position ([#227]) * Deep Sky Object: Add support for RiseTransitSetCalculator ([#228]) ### Improvements * Drop `Astronoby::Apparent#angular_diameter` ([#221]) * Bump rubyzip from 3.0.2 to 3.2.1 by @dependabot ([#210], [#215], [#223], [#233]) * Bump standard from 1.50.0 to 1.51.1 by @dependabot ([#212], [#214]) * Be proud about the precision achieved ([#218]) * Use local apparent instead of local mean sidereal time for hour angle ([#225]) * Bump rspec from 3.13.1 to 3.13.2 by @dependabot ([#229]) * Bump benchmark from 0.4.1 to 0.5.0 by @dependabot ([#230]) * Add documentation for deep-sky objects ([#232]) * Bump rake from 13.3.0 to 13.3.1 by @dependabot ([#235]) ### Backward-incompatible changes * Drop `Astronoby::Apparent#angular_diameter` ([#221]) * Use local apparent instead of local mean sidereal time for hour angle ([#225]) **Full Changelog**: v0.8.0...v0.9.0 [#210]: #210 [#211]: #211 [#212]: #212 [#213]: #213 [#214]: #214 [#215]: #215 [#217]: #217 [#218]: #218 [#219]: #219 [#220]: #220 [#221]: #221 [#222]: #222 [#223]: #223 [#225]: #225 [#226]: #226 [#227]: #227 [#228]: #228 [#229]: #229 [#230]: #230 [#232]: #232 [#233]: #233 [#235]: #235 [UPGRADING.md]: https://github.com/rhannequin/astronoby/blob/main/UPGRADING.md
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Except the Sun, all solar system bodies supported by Astronoby have an elliptical orbit around their primary body (Sun for planets, Earth for the Moon). This means these bodies are constantly approaching or receding from their primary body, except at the exact moments of apoapsis and periapsis.
This change introduces
#approaching_primary?and#receding_from_primary?for getting this information. It is also an introduction for computing apoapsis and periapsis events, which are coming soon. 🎉