The phrase “how big is Artemis” can mean a few different things, depending on context—most commonly either the Artemis space program , the Artemis rocket/launch system , or the Artemis asteroid. Here’s a quick breakdown of each “Artemis” by size.

1. NASA’s Artemis rocket (Space Launch System – SLS)

When people ask “how big is Artemis,” they’re usually picturing the Artemis‑brand launch stack :

  • Height : About 98 meters (322 feet) for the full Artemis‑2 Space Launch System stack, making it roughly the same height as a 30‑story building.
  • Mass when fueled : Around 2.6 million kilograms (~5.7 million pounds) , which is heavier than most large passenger ships.
  • Core stage diameter : About 8.4 meters (27.6 feet) , with the twin solid rocket boosters flanking it.

In short, the Artemis rocket is taller and heavier than the Apollo‑era Saturn V , and one of the largest and most powerful rockets ever built.

2. Orion capsule (where astronauts live)

The actual crew “capsule” on top of Artemis is the Orion spacecraft :

  • Roughly 5 meters (16.5 feet) in diameter and about 3 meters (11 feet) tall in the crew‑module portion.
  • Pressurized volume is about 690 cubic feet (≈20 m³) , with roughly 330 cubic feet (≈10 m³) of habitable space for the crew.
  • Often compared in media to a “garden shed” because it’s compact for four astronauts on a multi‑day mission.

3. Asteroid 105 Artemis

If someone is asking about the asteroid Artemis (105 Artemis):

  • Diameter : About 95 kilometers (≈60 miles) , which is larger than 99% of known asteroids.
  • For comparison, that’s roughly the width of the U.S. state of Delaware , making it a very large main‑belt asteroid between Mars and Jupiter.

Size comparison (Artemis topics)

Item| Approximate size / stats| How it compares
---|---|---
Artemis SLS rocket| ~98 m tall, ~2.6M kg| Slightly taller than Saturn V; launch‑stack mass of a small ship489
Orion crew module| ~5 m wide, ~3 m tall| Habitable space similar to a small room or big garden shed38
Asteroid 105 Artemis| ~95 km diameter| About the width of Delaware; one of the largest asteroids5

If you tell me which “Artemis” you meant (the rocket, the program, the Orion capsule, or the asteroid), I can drill down with even more specific numbers and fun analogies (like “how many cars it could carry” or “how big its shadow is”).