---
license: cc-by-4.0
pretty_name: "Artemis II Mission Data"
language:
  - en
description: "NASA Artemis II crewed lunar flyby mission: trajectory state vectors from JPL Horizons, crew manifest, mission timeline, and payload inventory."
task_categories:
  - time-series-forecasting
  - tabular-regression
tags:
  - space
  - artemis
  - nasa
  - moon
  - lunar
  - orion
  - trajectory
  - orbital-mechanics
  - sls
  - deep-space
  - open-data
  - tabular-data
  - parquet
size_categories:
  - 1K<n<10K
configs:
  - config_name: trajectory
    data_files:
      - split: train
        path: data/trajectory.parquet
    default: true
  - config_name: crew
    data_files:
      - split: train
        path: data/crew.parquet
  - config_name: timeline
    data_files:
      - split: train
        path: data/timeline.parquet
  - config_name: payloads
    data_files:
      - split: train
        path: data/payloads.parquet
---

# Artemis II Mission Data

<div align="center">
  <img src="banner.jpg" alt="Voyager spacecraft artist concept" width="400">
  <p><em>Credit: NASA/JPL-Caltech</em></p>
</div>

*Part of a [dataset collection](https://huggingface.co/collections/juliensimon/space-probe-and-mission-datasets-69c3fe82d410a42b1e313167) on Hugging Face.*

## Dataset description

Comprehensive dataset for NASA's **Artemis II** mission -- the first crewed flight beyond low Earth orbit since Apollo 17 (1972). Covers the ~10-day crewed lunar flyby aboard the Orion spacecraft *Integrity*, launched April 1, 2026 on SLS Block 1.

## Configs

This dataset has four configs (tables):

| Config | Records | Description |
|--------|---------|-------------|
| `trajectory` | **1,284** | State vectors at 10-min intervals (position, velocity, distances) |
| `timeline` | **47** | Mission events from terminal countdown through splashdown |
| `crew` | **4** | Crew manifest with biographical data |
| `payloads` | **8** | CubeSats and onboard experiments |

### Trajectory schema

| Column | Description |
|--------|-------------|
| `epoch_tdb` | Timestamp of the state vector in Barycentric Dynamical Time (TDB), sampled at 10-minute intervals throughout the mission; TDB differs from UTC by a slowly varying offset (~69 s during 2026) |
| `x_km` | Geocentric X position in km in the J2000 mean ecliptic and equinox frame; origin at Earth's center; X-axis points toward vernal equinox; typical range +/-450,000 km |
| `y_km` | Geocentric Y position in km (J2000 ecliptic frame); orthogonal to X in the ecliptic plane |
| `z_km` | Geocentric Z position in km (J2000 ecliptic frame); positive toward ecliptic north pole; small for near-ecliptic trajectories |
| `vx_km_s` | X velocity component in km/s (J2000 geocentric frame); Orion reaches ~10.8 km/s at TLI and ~11 km/s at entry interface |
| `vy_km_s` | Y velocity component in km/s (J2000 geocentric frame) |
| `vz_km_s` | Z velocity component in km/s (J2000 geocentric frame) |
| `distance_earth_km` | Distance from Earth's center in km, derived as sqrt(x^2+y^2+z^2); peaks near 450,000 km during the lunar flyby; Earth's surface is at 6,371 km |
| `speed_km_s` | Scalar speed in km/s, derived as sqrt(vx^2+vy^2+vz^2); peaks at TLI burn (~10.8 km/s) |
| `distance_moon_km` | Distance from the Moon's center in km from selenocentric Horizons query; minimum occurs at closest lunar approach (~8,900 km); null if Horizons returned mismatched row counts |
| `mission_phase` | Mission segment label: earth_orbit, transit_outbound, lunar_approach, lunar_flyby, transit_return, or entry |

### Crew schema

| Column | Description |
|--------|-------------|
| `name` | Full name of the crew member |
| `role` | Role on the mission: Commander, Pilot, Mission Specialist 1, or Mission Specialist 2 |
| `agency` | Space agency: NASA or CSA (Canadian Space Agency) |
| `nationality` | Nationality of the crew member |
| `birth_date` | Date of birth in YYYY-MM-DD format |
| `birth_place` | City and state/province of birth |
| `selection_year` | Year selected as astronaut/candidate by their space agency |
| `military_rank` | Military rank and branch if applicable; null for civilian astronauts |
| `previous_missions` | Previous spaceflight missions with dates; null if first flight |
| `previous_flight_days` | Total days spent in space on previous missions; 0 for rookie astronauts |
| `eva_count` | Number of previous extravehicular activities (spacewalks); 0 if none |
| `eva_hours` | Total hours of previous EVA time; 0.0 if no EVAs |
| `notable` | Notable achievements or distinctions of the crew member |

### Timeline schema

| Column | Description |
|--------|-------------|
| `met` | Mission Elapsed Time in T+DD:HH:MM format (or T-HH:MM:SS for pre-launch events); referenced from booster ignition/liftoff at T+00:00:00 |
| `phase` | Mission phase label: terminal_countdown, ascent, earth_orbit, transit_outbound, lunar_flyby, transit_return, or entry |
| `event` | Free-text description of the mission event or milestone |

### Payloads schema

| Column | Description |
|--------|-------------|
| `name` | Name of the CubeSat or experiment (e.g. 'TACHELES', 'Proximity Ops Demo') |
| `type` | Payload type: 'CubeSat' for secondary spacecraft or 'experiment' for onboard demonstrations |
| `provider_country` | Country providing the payload (e.g. 'Germany', 'USA') |
| `provider_agency` | Space agency or organization providing the payload (e.g. 'DLR', 'NASA') |
| `mass_kg` | Payload mass in kg; null for experiments without a discrete mass |
| `objective` | Primary scientific or technology demonstration objective of the payload |

## Quick stats

- **1,284** trajectory vectors (2026-04-02 02:00 to 2026-04-10 23:50 TDB)
- Maximum distance from Earth: **413,143 km** (256770 statute miles)
- Closest lunar approach: **8,283 km** at 2026-04-06 23:00 TDB
- Maximum speed: **10.57 km/s** (38068 km/h)
- Crew: **4** (3 NASA + 1 CSA) -- first crewed mission beyond LEO in 54 years
- CubeSats: **4** secondary payloads from Germany, South Korea, Saudi Arabia, Argentina

## Usage

```python
from datasets import load_dataset

# Trajectory data (default config)
ds = load_dataset("juliensimon/artemis-ii", split="train")
df = ds.to_pandas()

# Plot distance from Moon over time
import matplotlib.pyplot as plt
plt.figure(figsize=(12, 4))
plt.plot(df["epoch_tdb"], df["distance_moon_km"])
plt.xlabel("Time (TDB)")
plt.ylabel("Distance from Moon (km)")
plt.title("Artemis II -- Distance to Moon")
plt.tight_layout()
plt.show()

# Find closest lunar approach
idx = df["distance_moon_km"].idxmin()
print(f"Closest approach: {df.loc[idx, 'distance_moon_km']:,.0f} km at {df.loc[idx, 'epoch_tdb']}")

# Load other configs
crew = load_dataset("juliensimon/artemis-ii", "crew", split="train").to_pandas()
timeline = load_dataset("juliensimon/artemis-ii", "timeline", split="train").to_pandas()
payloads = load_dataset("juliensimon/artemis-ii", "payloads", split="train").to_pandas()
```

## Data source

- **Trajectory:** [JPL Horizons](https://ssd.jpl.nasa.gov/horizons/) -- spacecraft `-1024` ("Integrity Orion EM-2")
- **Timeline & crew:** [NASA Artemis II Press Kit](https://www.nasa.gov/wp-content/uploads/2026/01/artemis-ii-press-kit.pdf) and [launch blog](https://www.nasa.gov/blogs/missions/2026/04/01/live-artemis-ii-launch-day-updates/)
- **Payload data:** NASA, DLR, KARI, KACST, CONAE public announcements

## Update schedule

Updated during the mission as JPL Horizons trajectory data is refined. Will switch to as-flown ephemeris after splashdown.

## Related datasets

- [juliensimon/space-track-tle-history](https://huggingface.co/datasets/juliensimon/space-track-tle-history)
- [juliensimon/donki-space-weather-events](https://huggingface.co/datasets/juliensimon/donki-space-weather-events)
- [juliensimon/dst-index](https://huggingface.co/datasets/juliensimon/dst-index)

## Citation

```bibtex
@dataset{artemis_ii,
  title = {Artemis II Mission Data},
  author = {juliensimon},
  year = {2026},
  url = {https://huggingface.co/datasets/juliensimon/artemis-ii},
  publisher = {Hugging Face}
}
```

## License

[CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/)