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Arrow Varuna
by OrbitHangar 11-26-2009, 04:00 PM


Author: etudiant spatial

Kuiper asteroid Varuna

This add-on contains the Kuiper asteroid Varuna.

Don't forget to read the read-me.txt file! It's very important for the installation.

---------------------------------------------------------------------------------------
Asteroide de la ceinture de Kuiper Varuna

Cet add-on contient l'astéroide Varuna de la ceinture de Kuiper.

N'oubliez pas de lire le fichier lisez-moi.txt! C'est très important pour l'installation.



Happy Flying! Bon vol!

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Old 11-26-2009, 04:19 PM   #2
the.punk
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Nice mesh.
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Old 09-23-2016, 01:12 AM   #3
JonnyBGoode
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Varuna's inclination is way off. It's inclination is like 90 degrees to the ecliptic.

I discovered why. Varuna's actual inclination is about 17.165 degrees. The cfg says 17.158... radians. Which is like 983 degrees. The other orbital parameters are similarly wrong.

Changing the orbital parameters to:

Code:
Inclination = 0.299585766            ; rad
LongAscNode = 1.69813555         ; rad
LongPerihelion = 4.72792241        ; rad
MeanLongitude = 0.072780282168       ; rad
fixes the problem. Thanks to downloaderfan for the corrected figures.

Last edited by JonnyBGoode; 09-23-2016 at 01:16 AM.
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Old 09-23-2016, 02:54 AM   #4
boogabooga
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What happens in Orbiter 2010?
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Old 09-23-2016, 03:10 AM   #5
JonnyBGoode
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I'm guessing the same thing. I don't think 2010 calculates orbits any differently than 2016. It wants those numbers in radians, but the creator of the addon input them in degrees.

It's an easy mistake to make... remember the Mars Climate Orbiter?
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Old 09-23-2016, 04:12 AM   #6
boogabooga
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Well, he is a student.
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Old 09-25-2016, 10:52 PM   #7
downloaderfan
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Actual correct parameters for Varuna. Taken from NASA's website & confirmed with some other astronomy apps.

Code:
Epoch = 2016.57905544148              ; 
SemiMajorAxis = 6442950279469.6591797 ; meters
Eccentricity = 0.05052422717173251
Inclination = 0.2997823783734367975            ; rad
LongAscNode = 1.6982957103063498483      ; rad
LongPerihelion = 0.1165669506359328922     ; rad
MeanLongitude = 1.9904093660688890743       ; rad
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