Questions tagged [spherical-astronomy]
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Correct longitude from longitude over 180°
Last week, one of my exercise tasks was about determining the an observer's position on Earth, when in their zenith is a certain star with known right ascension and declination. We were supposed to ...
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Demonstration- formula for angle between horizon and ecliptic
The most precise and quite intuitive formula I could find online is here: https://www.celestialprogramming.com/snippets/angleBetweenEclipticAndHorizon.html
$$\cos I = \cos ϵ \sin ϕ − \sin ϵ \cos ϕ \...
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Transformation matrices and their derivation (if possible) for ICRS frame for reference to other frames
I am finishing up my thesis write up and one of the chapters in my thesis is on astronomical coordinate systems since in my analysis of data I have converted the available astrometry from the ICRS ...
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Angular distance calculation in Equatorial and Galactic coordinates
I calculated the angular distance between the Galactic Center and Andromeda in Equatorial and Galactic coordinates and observed that the distance is calculated differently depending on the coordinate ...
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Discrepancies in the equations for converting Horizontal coordinates to Equatorial coordinates
Hello I am trying to convert my Horizontal coordinate system dataset into Equatorial coordinate system. However, it seems that all the information from the internet is different.
I will use symbols as ...
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how to calculate ecliptic coordinate of moon's ascending node?
Assume we have the ecliptic coordinate of moon; how can we calculate the ecliptic coordinate of its ascending node?
I think one approximate way is to use the moon's coordinate for two subsequent days ...
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Conversion of 1D plot in 3D plot gives different physics
I am to track the path of a particle due to Lorentz force of the planet magnetic field, assuming there is no gravitational force on it.
The equation of motion due to Lorentz force in rotating ...
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How can I convert my sky coordinate system (RA, Dec) into galactic coordinate system (l, b)?
I am an astro-particle physics PhD student trying to look for a simulation.
I was looking for a conversion formula for sky (or celestial or Equatorial) coordinate system using Right Ascension and ...
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