b612
044f2f4381
- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算 - 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询 - 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出 - 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解 - 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤 - 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持 - 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理 - 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则
24 lines
1.3 KiB
Go
24 lines
1.3 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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// Optional planetary perturbations are available through PropagationOptions and
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// StateWithOptions; a zero-value options value preserves the two-body path.
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// Apparent results add annual aberration, nutation, and of-date coordinate
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// conversion to the astrometric position. 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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