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
60 lines
2.0 KiB
Go
60 lines
2.0 KiB
Go
package orbit
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import (
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"math"
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"testing"
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"time"
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"b612.me/astro/basic"
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)
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func TestAsteroidMagnitudeHGMatchesDirectFormula(t *testing.T) {
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elements := sampleObservationElements()
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date := time.Date(2025, 11, 21, 20, 0, 0, 0, time.UTC)
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absoluteMagnitude := 3.34
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slopeParameter := 0.12
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got := AsteroidMagnitudeHG(date, elements, absoluteMagnitude, slopeParameter)
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if math.IsNaN(got) || math.IsInf(got, 0) {
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t.Fatalf("magnitude should be finite: %.18f", got)
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}
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sunDistance := SunDistance(date, elements)
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earthDistance := EarthDistance(date, elements)
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phaseAngle := PhaseAngle(date, elements)
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want := absoluteMagnitude + 5*math.Log10(sunDistance*earthDistance) - 2.5*math.Log10(hgSlopeBlendTest(phaseAngle, slopeParameter))
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if math.Abs(got-want) > 1e-12 {
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t.Fatalf("H-G magnitude mismatch: got %.15f want %.15f", got, want)
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}
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}
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func TestAsteroidMagnitudeHGShiftsWithAbsoluteMagnitude(t *testing.T) {
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elements := sampleObservationElements()
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date := time.Date(2025, 11, 21, 20, 0, 0, 0, time.UTC)
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baseMagnitude := AsteroidMagnitudeHG(date, elements, 3.34, 0.12)
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shiftedMagnitude := AsteroidMagnitudeHG(date, elements, 4.34, 0.12)
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if math.Abs((shiftedMagnitude-baseMagnitude)-1) > 1e-12 {
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t.Fatalf("H shift should move magnitude by exactly 1: base=%.15f shifted=%.15f", baseMagnitude, shiftedMagnitude)
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}
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}
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func TestAsteroidMagnitudeHGInvalidInputReturnsNaN(t *testing.T) {
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elements := sampleObservationElements()
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date := time.Date(2025, 11, 21, 20, 0, 0, 0, time.UTC)
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if !math.IsNaN(AsteroidMagnitudeHG(date, elements, math.NaN(), 0.12)) {
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t.Fatalf("NaN H should produce NaN result")
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}
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if !math.IsNaN(basic.OrbitAsteroidMagnitudeHG(math.NaN(), toBasicElements(elements), 3.34, 0.12)) {
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t.Fatalf("NaN jd should produce NaN result")
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}
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}
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func hgSlopeBlendTest(phaseAngle, slopeParameter float64) float64 {
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tanHalf := math.Tan((phaseAngle * math.Pi / 180) / 2)
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phi1 := math.Exp(-3.33 * math.Pow(tanHalf, 0.63))
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phi2 := math.Exp(-1.87 * math.Pow(tanHalf, 1.22))
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return (1-slopeParameter)*phi1 + slopeParameter*phi2
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}
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