Indeed JPL's Horizons System is the easiest option to use for
tracking the Artemis 1 mission objects.

Do not try to track these objects using TLEs and your favorite
satellite tracking program. That will not work. TLEs are only
usable in combination with the SGP4/SDP4 model, which is used
in all our usual satellite tracking programs. But SGP4/SDP4 only
produces useful tracking results for objects in Earth orbit at
altitudes of no more than some 50000 km. For deep space, so
e.g. for missions to the Moon, you need a different type of
parameters, e.g. State Vectors, and different tracking software,
e.g. GMAT. State Vectors will be made available for the Artemis 1
mission objects. Preliminary State Vectors for Orion are available:
https://www.nasa.gov/sites/default/files/atoms/files/orion_oem_20220903_v1_lp25_p000_open_3.pdf
Of course these will change when the launch date/time change.
You can also generate up-to-date State Vectors in Horizons System.

For 3D visual representation you can indeed use the AROW site
during the mission:
https://www.nasa.gov/specials/trackartemis/
or this alternative:
https://www.binary-space.com/spacemissions/?Mission=ARTEMIS%20I
More info on this site: https://celestrak.org/events/Artemis-I/

If you want to try to receive the 70 cm downlinks of the OMOTENASHI
orbiter and lander, make sure to check their updated transmission
schedule:
https://twitter.com/OMOTENASHI_JAXA

73,
Nico PA0DLO

On 03-09-2022 11:33, David G0MRF via AMSAT-BB wrote:
Thank you Joe (s) and Brian

Horizons seems the best choice for tracking from a specific location. I quickly changed the target and set my location and it looks good to go.

The AROW visualisation isn't fully up and running prior to launch, but appears to be aimed at the relataive position of the mission to the Earth and Moon.  Still, worth checking after 1817 UTC today. It does have some nice graphics.

Looking at the link budget, the PSK 31 from OMOTENASHI should be receivable with a modest system out to 100,000km. After that antenna gain and noise figure become increasingly important.
Fingers crossed. Lets hope the sticky valve is fixed.

73

David

-----Original Message-----
From: David G0MRF via AMSAT-BB <[email protected]>
To: [email protected] <[email protected]>
Sent: Fri, 2 Sep 2022 22:15
Subject: [AMSAT-BB] Tracking Artemis-1
Does anyone know how to track Artemis 1 during the next few days.?

Tracking the moon is fairly straightforward, but trying to locate the cubesat signals on 70cm during the flight there probably needs some dedicated tracking software.

Maybe some resource online?

73

David G0MRF

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