Laplace Limit Calculator
Free online laplace limit calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.
中文版：Laplace 极限在线计算器
Laplace 极限 e* = 0.6627434193491815 是天体力学中最古老的普适常数之一：拉普拉斯在研究木星卫星运动时发现，级数 Σ e^k·k^k/k! 在 e 大于某个临界值后发散——用 Stirling 近似 k! ≈ (k/e)^k 化简，通项趋于 e^k，临界点正是 e = 1/sinh t*，其中 t* 是 t·tanh t = 1 的唯一正根。
几何意义：椭圆轨道摄动理论中偏心率 e 超过 e* 后，经典展开（如运动方程的拉普拉斯系数）全部失效，必须换用其他摄动方法。它也出现在开普勒方程 E − e·sin E = M 的幂级数收敛半径上——e* 是「摄动级数还有效」的最大偏心率。
参考值
e* = 0.6627434193491815，t* = 1.199678640257734
水星偏心率 0.2056、火星 0.0934、冥王星 0.2488——均远小于 e*
How to use the Laplace Limit Calculator
- Fill in the inputs with your own numbers — every field shows what it expects.
- The result updates instantly as you type; no "Calculate" click needed.
- Read the result card for the main figure, the step-by-step formula, and practical notes.
Frequently asked questions
Is the Laplace Limit Calculator free?
Yes — all math calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.
Is there a Chinese version of this tool?
Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.
References
Formulas and benchmarks used by this calculator follow these published sources.
KevinContent LeadCalcton Editorial Team · Last updated 2026-09-27
Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.
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