I Lunar apsidal precession relative to equinox

AI Thread Summary
The lunar apsidal precession period is approximately 8.8506 years when measured against fixed stars. To convert this period to alignments with the spring equinox, one can use specific formulas that account for the differences in precession directions. The calculations involve the relationship between lunar apsidal precession and general precession, recognizing that lunar precession is prograde while equinox precession is retrograde. The suggested formulas include 1/(1/pApsidal + 1/25772.) and 1/(1/pApsides +(1-Sidereal_year/Tropical_year)). Understanding these relationships is crucial for accurate astronomical calculations.
fizzy
Messages
194
Reaction score
17
The period of the lunar apsidal precession is about 8.8506 years measured against fixed starts. How can I accurately convert this to the period between alignments with spring equinox?

Thanks.
 
Astronomy news on Phys.org
since lunar apsidal precession is prograde and general precession ( equinox ) is retrograde, is this correct?

1/(1/pApsidal + 1/25772.)

1/(1/pApsides +(1-Sidereal_year/Tropical_year))
 

Thread 'Potential biosignature found in Mars rock'

Publication: Redox-driven mineral and organic associations in Jezero Crater, Mars Article: NASA Says Mars Rover Discovered Potential Biosignature Last Year Press conference The ~100 authors don't find a good way this could have formed without life, but also can't rule it out. Now that they have shared their findings with the larger community someone else might find an explanation - or maybe it was actually made by life.
View full post »

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »
Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
View full post »

Similar threads

I What causes the precession of the equinox?
Replies
7
Views
2K
A What is the cause of lunar nodal and apsidal precession?
Replies
36
Views
17K
Why Does the ELP2000-82b Lunar Theory Differ from Jean Meeus' Adjustments?
Replies
2
Views
2K
What is the cause of variations in lunar eccentricity?
Replies
28
Views
7K
I Mercury's precession due to other planets
Replies
1
Views
2K
Solving a Cipher: Celestial coordinates and precession
Replies
2
Views
2K
I A Puzzle Regarding the Time Between Consecutive March Equinoxes
Replies
30
Views
4K
I Nature paper on Moon's initial evolution - Tidally driven remelting
Replies
1
Views
2K
I How to quantify gyroscopic precession torque?
Replies
34
Views
3K
I Understanding Astronomical Days & Measuring a Year's Length
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top