anomalistic month: meaning, definition, pronunciation and examples
RareTechnical/Scientific
Quick answer
What does “anomalistic month” mean?
The average time the Moon takes to make one complete orbit around the Earth, measured from perigee to perigee (its closest point to Earth).
Audio
Pronunciation
Definition
Meaning and Definition
The average time the Moon takes to make one complete orbit around the Earth, measured from perigee to perigee (its closest point to Earth).
In astronomy and orbital mechanics, it is one of several lunar month types, specifically defined by the Moon's elliptical orbit. Its length is about 27.55455 days, slightly longer than the sidereal month, due to the slow forward progression of the perigee.
Dialectal Variation
British vs American Usage
Differences
No lexical or grammatical differences. Potential minor spelling differences only in surrounding text (e.g., 'behaviour' vs. 'behavior').
Connotations
Identical technical connotations in both varieties.
Frequency
Equally rare in both British and American English, confined to specialist contexts.
Grammar
How to Use “anomalistic month” in a Sentence
The [noun] is defined by the anomalistic month.One anomalistic month lasts approximately [number] days.The difference between the [other lunar month] and the anomalistic month is...Vocabulary
Collocations
Examples
Examples of “anomalistic month” in a Sentence
adjective
British English
- The anomalistic month period is key to understanding tidal variations.
American English
- Anomalistic month calculations require precise ephemeris data.
Usage
Meaning in Context
Business
Not used.
Academic
Used in advanced astronomy, physics, and geoscience papers and textbooks when discussing orbital parameters of the Moon.
Everyday
Virtually never used.
Technical
Primary context. Used in precise astronomical calculations, satellite orbit analysis (for lunar-similar orbits), and historical calendar studies.
Vocabulary
Synonyms of “anomalistic month”
Neutral
Weak
Watch out
Common Mistakes When Using “anomalistic month”
- Mispronouncing 'anomalistic' with stress on the second syllable (/əˈnɒm.ə.lɪs.tɪk/ is correct).
- Confusing it with the more common 'synodic month' (full moon to full moon).
- Using it in non-scientific contexts where 'lunar month' would suffice.
FAQ
Frequently Asked Questions
Approximately 27.55455 days, or about 27 days, 13 hours, 18 minutes, and 33 seconds.
Because the point of perigee (the Moon's closest approach to Earth) slowly moves forward along the Moon's orbit, so the Moon must travel a bit farther to reach it again.
Almost exclusively in advanced astronomical texts, research papers on orbital dynamics, or detailed explanations of lunar cycles and eclipse prediction.
An anomalistic month is perigee-to-perigee (~27.55 days). A synodic month is phase-to-phase, e.g., new moon to new moon (~29.53 days), which is the familiar lunar month.
The average time the Moon takes to make one complete orbit around the Earth, measured from perigee to perigee (its closest point to Earth).
Anomalistic month is usually technical/scientific in register.
Anomalistic month: in British English it is pronounced /əˌnɒm.əˈlɪs.tɪk mʌnθ/, and in American English it is pronounced /əˌnɑː.məˈlɪs.tɪk mʌnθ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
ANOMALISTIC month tracks the Moon's ANOMALOUS, non-circular orbit from its closest point (perigee) back to that same point.
Conceptual Metaphor
A precise celestial yardstick for the Moon's elliptical journey.
Practice
Quiz
What is the primary factor defining the length of an anomalistic month?