Compute the equation of time #40
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The equation of time is the difference of the real Sun time and the mean Sun time. This difference is due to the elliptical shape of the Earth's orbit, and the obliquity of the orbit. `Sun` now has a `#equation_of_time` method that returns an integer: the time difference in seconds. ```rb date = Date.new(2010, 7, 27) Astronoby::Sun.equation_of_time(date: date) ```
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## 0.2.0 - 2024-03-24 _If you are upgrading: please see [`UPGRADING.md`]._ [`UPGRADING.md`]: https://github.com/rhannequin/astronoby/blob/main/UPGRADING.md ### Features * Angle comparison ([#21]) * Add `#distance` and `#angular_size` to `Astronoby::Sun` ([#30]) * Add geocentric parallax `Astronoby::GeocentricParallax` ([#31]) * Ability to calculate equinoxes and solstices times ([#32]) * Round rising and setting times to the second ([#38]) * Provide sunrise and sunset times ([#35]) * Provide sunrise and sunset azimuths ([#39]) * Ability to calculate the equation of time ([#40]) ### Breaking changes * **breaking:** Accurate setting and rising times for punctual bodies ([#29]) * **breaking:** Drop `Astronoby::Util::Time` in favor of `Astronoby::GreenwichSiderealTime` and `Astonoby::LocalSiderealTime` ([#36]) ### Improvements * Add Dependabot for Bundler and GitHub Actions ([#24]) * Add bundler-audit GitHub Action ([#25]) * Bump actions/checkout from 3 to 4 ([#26]) * Bump standard from 1.29.0 to 1.35.1 ([#27], [#37]) * Bump rspec from 3.12.0 to 3.13.0 ([#28]) [#21]: #21 [#24]: #24 [#25]: #25 [#26]: #26 [#27]: #27 [#28]: #28 [#29]: #29 [#30]: #30 [#31]: #31 [#32]: #32 [#35]: #35 [#36]: #36 [#37]: #37 [#38]: #38 [#39]: #39 [#40]: #40
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The equation of time is the difference of the real Sun time and the mean Sun time. This difference is due to the elliptical shape of the Earth's orbit, and the obliquity of the orbit.
Sunnow has a#equation_of_timemethod that returns an integer: the time difference in seconds.