Questions tagged [sidereal-period]

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The orbital period of Jupiter and Europa billions of years later

We know that the Sun gets so big billions of years later and the Earth will get destroyed. What will the orbital period of Jupiter (Sun-Jupiter system) and its moon Europa (Jupiter-Europa system) be ...
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8 votes
2 answers
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Can we estimate the orbital period of the planet Phaeton (destroyed planet between Mars and Jupiter)?

Phaeton was a planet hypothesized to have existed between the orbits of Mars and Jupiter, the destruction of which supposedly led to the formation of the asteroid belt. Can we measure its orbital ...
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2 votes
1 answer
118 views

What is precision of planet periods data?

Wikipedia gives $10759.22$ days for sidereal period of Saturn. I have calculated a period from de441_part-1.bsp and obtained $10736.247\bar{2}$ days. Why such a big difference? Which is more accurate? ...
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2 votes
2 answers
86 views

defining the period of an year on earth

While it is much simpler to define the duration (time) of ONE complete day (for earth), by simply calling it to be the period between sunrise to next sunrise (which we have currently divided into 24 ...
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1 answer
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Would a Jovian calendar be based on the Jovian sidereal year or tropical year? [closed]

According to many places online, Jupiter's tiny axial tilt makes it have no seasons, and its huge size eliminates any variance possible due to its orbital eccentricity. All these considered, what ...
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0 votes
1 answer
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How long is a mean Jovian tropical year in Jovian solar days?

Many sources say that Jupiter's year lasts 10,475.8 Jovian days. When I calculated to see if that's correct With the data NASA had published, I found out it's the measurement of a Jovian sidereal year....
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2 votes
1 answer
135 views

How long was a lunar month in ancient times?

As the Moon is getting farther and farther from Earth, it's natural that the time it takes to circle around our planet is going to increase, thus the month will be longer. However, I read that the ...
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  • 273
1 vote
1 answer
696 views

Right ascension and sidereal time difference

I've read quite a few articles about this and watched visualisations but I still struggle to get a mental map of how this works I understand that on March 21/22 RA 0 is on my meridian at local noon. ...
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2 votes
2 answers
246 views

Is the difference in time between the sideral and synodyc month - constant?

According what I read, the sideral month isn't constant (here)1, as well as the synodic month that isn't constant (here)2. Now, as far as I understood, because the sideral month isn't constant ...
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1 vote
1 answer
83 views

How many degrees does the sidereal month orbit?

It's written everywhere that anomalistic month orbits 360 degrees completely, then how many degrees does the sidereal month orbit? Here is written that the sidereal month orbits 360 degrees too, ...
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2 votes
2 answers
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Is it possible to explain the difference between synodic month and sidereal month by degrees?

Is it possible to explain the difference between synodic and sidereal month by degrees - in the following way? Just recently I learnt about these two types of months, and I want to see if I can ...
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