v0.10.0

0.10.0 - 2026-06-26

If you are upgrading: please see UPGRADING.md.

Bug fixes

• Fix constant name typo (#245)
• Fix matrix multiplication order in Apparent frame (#250)
• Remove spurious N·P from observer ECEF-to-TOD transformation (#251)
• Apply aberration in GCRS before precession/nutation rotation (#253)
• Fix Moon magnitude (#254)
• Fix astrometric position for Deep Sky Objects (#272)

Features

• Defer Solar System body computations lazily (#244)
• Integrate iers gem for Delta T and GMST (#249)
• Add IERS polar motion correction to observer ECEF-to-TOD transformation (#252)
• Fall back to polynomial GMST for dates outside IERS EOP range (#255)
• Add ICRS frame bias to precession matrix (#257)
• Extract EarthRotation class from Observer (#260)
• Add TEME reference frame for satellite tracking (#261)
• Add ECEF to geodetic conversion (WGS-84) (#262)
• Memoize per-instant conversions on Instant (#268)
• Add ReferenceFrame#separation_from for angular separation (#269)
• Introduce Center, Body and Position domain objects (#270)
• Add planetary phenomena (#271)
• Add lunar libration, position angle of axis and bright limb (#273)
• Add Astronoby::Orientation for arcsecond lunar libration (#279)
• Add Lunar eclipses (#280)
• Add Astronoby::Duration (#281)

Improvements

• Optimize nutation loop by eliminating array allocations (#246)
• Reuse single Nutation instance in observer matrix computation (#247)
• Memoize Observer geodetic computation methods (#248)
• Update documentation with recent values (#256)
• Update referential frames documentation (#258)
• YARD documentation update (#259)
• Update zlib, JSON and ERB for security reasons
• Add references to README
• Bump actions/checkout from 5 to 7 by @dependabot (#239, #276)
• Bump rubyzip from 3.2.1 to 3.4.0 by @dependabot (#237, #267, #275)
• Bump irb from 1.15.2 to 1.17.0 by @dependabot (#242)
• Bump standard from 1.51.1 to 1.55.0 by @dependabot (#243, #274)
• Bump rake from 13.3.1 to 13.4.2 by @dependabot (#264)
• Bump ephem from 0.4.1 to 0.5.0 by @dependabot (#278)
• Upgrade default Ruby to 4.0.5 (#277)

Backward-incompatible changes

• Minimum Ruby version bumped to 3.2.0 (#249)
• Delta T and GMST now use IERS data (#249)
• Defer Solar System body computations lazily (#244)
• SolarSystemBody#ephem is now publicly accessible (#244)
• ReferenceFrame#center_identifier replaced by #center (#270)
• Sun#equation_of_time now returns a Duration (#281)

Full Changelog: v0.9.0...v0.10.0