Questions tagged [coordinate-systems]
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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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Orekit converting to galactic coordinates
I started using OreKit in a 3D star charting app I am writing in JavaFX. I wanted to convert from equatorial to galactic coordinates.
I can do it simply by using the transformations, but I wanted to ...
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Equatorial Co-Ordinates of the Solar Barycentre
Does anyone know where the solar barycentre is in the old equatorial (based on Earth's position on midday, 01/01/2000) system? I want to add an ICRS option for a 3d model I'm working on.
EDIT: degrees ...
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How to transform between horizontal and equatorial coordinates?
I want to express the transformation between horizontal (azimuth $A$,elevation/altitude $\varepsilon$) coordinates and equatorial (hourangle $H$/right ascension $\alpha$, declination $\delta$) as a ...
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Reverse polynomial model for reverse astrometry
I have a polynomial model that can transform pixel X,Y coordinates to standard $\xi, \eta$. This model looks like this:
$\xi/\eta = a_1 + a_2x + a_3y + a_4x^2 + a_5xy + a_6y^2 + a_7x^3 + a_8x^2y+a_9xy^...
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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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Transforming radio sources in a T-RECS catalogue from one field to another
I have sources that I extracted from The Tiered Radio Extragalactic Continuum Simulation (T-RECS) catalogue for a deep field. I use these sources to generate a sky model at different fields within a ...
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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 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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