starainrt
3ffdbe0034
- 新增日食、月食、本地可见性、中心线、半影区域、SVG 图示与沙罗周期信息 - 新增行星冲合、留、方照、物理星历、视直径、相位、亮肢角、轨道节点等计算 - 新增木星伽利略卫星位置、现象与接触事件计算 - 新增恒星星表、星座判定、自行修正与观测辅助能力 - 新增 coord、formula、orbit、sundial、lite/sun、lite/moon 等扩展包 - 完善农历年号、月相英文别名、视差角、大气质量、折射、日晷与双星计算 - 增加 NASA、JPL Horizons、IMCCE 等回归测试数据与基线测试 - 重构基础算法文件组织，补充大量公开 API 注释和语义回归测试 - 更新中文和英文 README，补充示例、精度说明、SVG 配图
23 lines
1.2 KiB
Go
23 lines
1.2 KiB
Go
// Package orbit propagates lightweight Sun-centered two-body conic orbits.
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//
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// Supported input styles:
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// - classical elliptic elements: A/E/I/Omega/W/M0 at EpochJD
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// - perihelion form: Q/E/I/Omega/W/TpJD for high-eccentricity, parabolic,
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// or hyperbolic comet-like trajectories
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//
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// All input angles are in degrees. EpochJD and TpJD are TT/TDB Julian days.
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// Returned geometric positions do not include perturbations beyond the supplied
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// elements. Astrometric results include down-leg light-time correction.
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// Apparent results follow this repository's existing planet semantics:
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// astrometric position plus nutation/of-date coordinate conversion, without a
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// full external aberration model. The package also provides observer-facing
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// altitude/azimuth/hour-angle and rise/transit/set helpers built on top of the
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// apparent topocentric coordinates. Rise/set helpers return package-local
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// sentinel errors ERR_ORBIT_NEVER_RISE / ERR_ORBIT_NEVER_SET, matching the
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// convention used by other public observation packages in this repository.
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//
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// In addition, the package includes a small classical visual-binary helper
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// based on the standard P/T/e/a/i/Omega/omega element set, returning apparent
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// position angle and separation on the sky.
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package orbit
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