Questions tagged [coordinate]
Questions on systems to uniquely determine position of a point or other geometric element on a manifold such as Euclidean space.
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Delta T used by US Naval Observatory
I'm trying to compare some eclipse calculations to that by the U.S. Naval Observatory, specifically, these results. One thing I just don't understand is how they come up with a Delta T of 72.8s. ...
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Gaia coordinates in J2000 as done by the CDS
So I'm interested in knowing how the CDS calculates the J2000 equatorial coordinates from the Gaia DR3 equatorial coordinates (that are given in epoch 2016.0).
For example, for the star HD 308819 = ...
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Is this description of ecliptic times correct?
I did a brief write-up as a pet research project to explore astro-geological calculation and visualisation for
Muslim prayer times. It's not meant to be authoritative (either scientifically
or ...
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Calculate geographical location (latitude, longitude) from horizontal and equatorial coordinates, date and UT
Lets say I found myself in the middle of nowhere with small computer with some sort of offline astrometry engine (like locally installed astrometry.net). I have some sort of mount that precisely tells ...
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Current sources for astronomical equation coefficients
For a project I needed to implement some of the code to calculate the position of the sun and moon. To do this I'm using Meeus. Everything is working but in doing so I've started to wonder about the ...
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Implementing polar coordinates correctly in solar system model?
I am working on a 2d solar system model using Python, but I'm unsure if my implementation of planet data is correct. I have the planet data stored in polar form (distance, velocity and angle), and I ...
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How to flatten 3d astronomical coordinates into 2d polar form in Python
I first asked this at Stack Overflow but got redirected here
I am making a 2d simulation of the solar system. For that you need a starting point for all planets. Right now I am storing that data in ...
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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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How to find the constellation in which the sun is located using the night sky map?
The following sky map was given as part of practice problems in my Astronomy course
The moon is in its first quarter phase. I am supposed to find the approximate date and time of the year in which ...
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Difference in results between JPL Horizons and cspice (rust-spice)
I am calculating the apparent planetary position of planets using the cspice library (I am specifically using rust-spice, which is a wrapper of cspice in Rust).
when I calculate the same values in the ...
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How to describe the Sun's location to an alien from our Galaxy?
Let's say you got to the planet orbiting other star in our Galaxy through the wormhole. You think that the travel was instant but you're not 100% sure and it is not exactly known. The planet is ...
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How to plot object on the map correctly
I am wondering how is it possible to plot the celestial object on the map I have attached if I only know following data:
16h 41m 41,24s
36° 27′ 35,5″
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Are the rotational axes of Earth and Mars parallel?
So I was stuck on a question involving the transformation of coordinates from geocentric to Mars-centric coordinates. The relative position of Mars and its orbital details are given. I thought that we ...
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How can non-earth-orbiting satellite coordinates be obtained by amateurs?
Just a few hours ago the moon-bound spacecraft Chandrayaan-3 was launched.
While it will orbit Earth for a few days, it is accelerating/changing its orbit often to prepare for the transfer to a lunar ...
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