CalculationTime

Eclipse Calculator

Live math canvas

Your numbers, formula and explanation together

Eclipse Calculator: eclipse date · 91/100. 2026-08-12: moon phase New Moon, 28.71 days old. Nearest Astronomy Engine event: global solar total eclipse peak 2026-08-12, 0.74 day(s) from the selected UTC date. This is a global eclipse-date screen; local visibility, path, magnitude and safety guidance still need official eclipse sources.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

SearchGlobalSolarEclipse(date − 370 days) and SearchLunarEclipse(date − 370 days), iterate forward one year, choose the nearest real eclipse peak, then score max(0, 100 − 12 × days from peak).
  1. Apply the formulaSearchGlobalSolarEclipse(date − 370 days) and SearchLunarEclipse(date − 370 days), iterate forward one year, choose the nearest real eclipse peak, then score max(0, 100 − 12 × days from peak).eclipse date · 91/1002026-08-12: moon phase New Moon, 28.71 days old. Nearest Astronomy Engine event: global solar total eclipse peak 2026-08-12, 0.74 day(s) from the selected UTC date. This is a global eclipse-date screen; local visibility, path, magnitude and safety guidance still need official eclipse sources.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Year
2,026
Month
8
Day
12

Resulting answer

eclipse date · 91/100

2026-08-12: moon phase New Moon, 28.71 days old. Nearest Astronomy Engine event: global solar total eclipse peak 2026-08-12, 0.74 day(s) from the selected UTC date. This is a global eclipse-date screen; local visibility, path, magnitude and safety guidance still need official eclipse sources.

Answer
eclipse date · 91/100
Live support
2026-08-12: moon phase New Moon, 28.71 days old. Nearest Astronomy Engine event: global solar total eclipse peak 2026-08-12, 0.74 day(s) from the selected UTC date. This is a global eclipse-date screen; local visibility, path, magnitude and safety guidance still need official eclipse sources.

Assumptions used

What this answer assumes

Engine-backed global eclipse proximity only. Do not use it as an official local eclipse calendar.

  • Uses Astronomy Engine global solar and lunar eclipse searches.
  • Scores distance from the nearest global eclipse peak to the selected UTC date.
  • Does not calculate local visibility path, local magnitude, Saros series or local circumstances.
  • Use NASA or official astronomical ephemerides for real eclipse dates and viewing.

Master’s Tip

How to use the result well

Master’s Tip: an eclipse needs both timing and geometry: new/full phase is not enough unless the Moon is also near its orbital node.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Year
2,026
Month
8
Day
12

What-if check

Engine eclipse proximity

The calculator searches real global solar and lunar eclipse peaks with Astronomy Engine, then scores how close the selected UTC date is to the nearest event.

CheckValueNote
score91/100higher means nearer peak
event gateeclipse dateengine eclipse search
search basissolar + lunarglobal eclipse peaks
use limitlocal visibilitypath and safety need official data

Visual proof

Result path

InputMethodAnswereclipse date · 91/100

2026-08-12: moon phase New Moon, 28.71 days old. Nearest Astronomy Engine event: global solar total eclipse peak 2026-08-12, 0.74 day(s) from the selected UTC date. This is a global eclipse-date screen; local visibility, path, magnitude and safety guidance still need official eclipse sources.

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Explain it like I'm 12

Eclipses require new/full Moon phase near the Moon’s orbital node. This page searches Astronomy Engine eclipse events and scores distance from the nearest global solar or lunar eclipse peak.

Formula

SearchGlobalSolarEclipse(date − 370 days) and SearchLunarEclipse(date − 370 days), iterate forward one year, choose the nearest real eclipse peak, then score max(0, 100 − 12 × days from peak).

Worked example

A date on or very near a real engine eclipse peak receives a high score. A date many days away from the nearest engine eclipse receives an ordinary lunar-month result.

Professional note

Master’s Tip: an eclipse needs both timing and geometry: new/full phase is not enough unless the Moon is also near its orbital node.

Regional and unit assumptions

Standard or basis: Astronomy Engine global eclipse search at UTC midnight.

Assumptions and limitations

Methodology & Accuracy

How this calculator is checked

CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.

Formula used

SearchGlobalSolarEclipse(date − 370 days) and SearchLunarEclipse(date − 370 days), iterate forward one year, choose the nearest real eclipse peak, then score max(0, 100 − 12 × days from peak).

Standard or basis

Standard or basis: Astronomy Engine global eclipse search at UTC midnight.

Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.

Master's Tip

Master’s Tip: an eclipse needs both timing and geometry: new/full phase is not enough unless the Moon is also near its orbital node.

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These cards are resolved from calculator data, category context and live-route status so the page links to useful next steps without hand-built link clutter.

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Questions

Does this predict exact eclipses?

It uses Astronomy Engine global eclipse searches, but it does not replace official local visibility, path, magnitude or safety sources.

Why do eclipses not happen every full and new moon?

The Moon’s orbit is tilted, so the Sun, Earth and Moon usually miss perfect alignment unless the phase happens near a node.

Where should I check real eclipse details?

Use official NASA or astronomical ephemeris resources for date, path, magnitude and local visibility.

Calculation note

Eclipse prediction depends on repeating lunar cycles, but exact visibility requires much more than a simple date score.