Ian Dees
The official Artemis tracking site (https://www.nasa.gov/missions/artemis-ii/arow/) doesn't work for me, so I built a better one using the same telemetry data: https://artemistracker.mapki.com/
NASA: Artemis II

Artemis I will be the first in a series of increasingly complex missions to build a sustained human presence at the Moon for decades to come.

NASA
Apr 2 at 3:05amWeb
Show threadAtanas2d ago
@ian This is amazing!
Show threadJ   2d ago
@ian This is beautiful. Thank you.
Show threadStephen Greenham2d ago
@ian Amazing, doesn't work for me either, so this is perfect!
Show threadMike  🇨🇦 🇳🇱1d ago
@ian @WTL ok…now that IS cool.
Show threadOlivier1d ago
@ian YES! Thank you! Bookmarked.
Show threadruthpozuelo1d ago
@ian Brilliant work 👏
Show threadJohan Barelds 🇪🇺1d ago
@ian
Well done and thanks! Works like a charm 😊👌
Show threadProcess "Tedious" Parsnip1d ago
@ian thanks!
Show threadÅsa Maria Hedberg - artist1d ago
@ian Thank you!!
Show threadSimon Walters1d ago
@ian A mate of mine is looking to directly access the telemetry data for a project - can you share info on that? // @biglesp
Show threadLessp1d ago
@cymplecy @ian Hi Ian, I would love to know how to access the telemetry, or if you could provide the source of the data? I want to show the data on a small screen attached to an RP2350 microcontroller. Thanks very much.
Show threadVincent Willcox1d ago

@biglesp @cymplecy @ian

The site has a GIT HUB link

https://github.com/iandees/artemis-viewer

and it looks like it grabs from here API_BASE = 'https://ssd.jpl.nasa.gov/api/horizons.api'

GitHub - iandees/artemis-viewer

Contribute to iandees/artemis-viewer development by creating an account on GitHub.

GitHub
Show threadVincent Willcox1d ago

@biglesp @cymplecy @ian

This then tracks to

https://ssd-api.jpl.nasa.gov/doc/horizons.html

Horizon API

Horizons APIVersion: 1.3 (2025 June)change logThis API provides access to JPL’sHorizons systemby specifying Horizons settings as parameters in the URL.An alt...

Show threadVincent Willcox1d ago

@biglesp @cymplecy @ian

Example URL

https://ssd.jpl.nasa.gov/api/horizons.api?format=json&COMMAND=%27-1024%27&EPHEM_TYPE=%27VECTORS%27&START_TIME=%272026-04-02+02%3A00%27&STOP_TIME=%272026-04-10+23%3A00%27&CENTER=%27500%40399%27&STEP_SIZE=%2710+min%27&VEC_TABLE=%272%27&VEC_LABELS=%27NO%27&CSV_FORMAT=%27YES%27&REF_PLANE=%27FRAME%27

Show threadLessp1d ago
@talktech @cymplecy @ian thanks very much. I shall take a look.
Show threadIan Dees22h ago
@biglesp @talktech @cymplecy that is the ephemeris data that tells you predicted location based on current velocity and orientation vectors. It powers the trajectory lines for the moon and Orion. There's also telemetry data from the Orion that gives live actual/measures location and orientation information. It's a separate feed that gets pulled from a NASA GCS bucket. Details about both are in the readme.
Show threadHanno Rein1d ago
@ian thank you!
Show threadSudo Sudo Sudo ⒶⒺⓋ1d ago
@ian brilliant 
Show threadMike would rather be running!1d ago
@ian This is fantastic!! Thank you!