Earth Escape Explorer
|Mission type||Technology demonstration|
|Operator||University of Colorado Boulder|
|Mission duration||1 year (planned)|
|Spacecraft||Earth Escape Explorer|
|Spacecraft type||6U CubeSat|
|Bus||XB1 (Blue Canyon Technologies - BCT)|
|Manufacturer||University of Colorado Boulder|
|Launch mass||14 kg (31 lb)|
|Dimensions||10 cm × 20 cm × 30 cm|
|Start of mission|
|Launch date||November 2021 (planned) |
|Rocket||SLS Block 1|
|Launch site||KSC, LC-39B|
|Reference system||Heliocentric orbit|
|Flyby of Moon|
|Frequency||C-band: 5182 MHz|
X-band: 8447.6 MHz 
|Capacity||13 bit/s (at 27 million km) |
|EIRP||108 dBm |
The Earth Escape Explorer spacecraft is a student-driven effort at University of Colorado Boulder to design and build the spacecraft as part of the NASA CubeQuest Challenge. It will be one of thirteen CubeSats to be carried with the Artemis 1 mission into a heliocentric orbit in cislunar space on the maiden flight of the Space Launch System (SLS) and the Orion spacecraft, scheduled to launch in 2021.
Once deployed in the vicinity of the Moon, CU-E3 will use a lunar gravity assist to propel itself into heliocentric orbit, trailing the Earth and slowly distancing itself over time. By the end of its one-year mission, CU-E3 is planned to be as far as 27 million kilometers from Earth. The spacecraft will use a commercial 6U CubeSat satellite body (bus) called XB1 of Blue Canyon Technologies (BCT), measuring about 10 cm × 20 cm × 30 cm. The mass is about 14 kg (31 lb). Electric power will be provided by solar panels and stored in rechargeable lithium batteries.
The mission is focused upon advancing deep space CubeSat communication techniques using an innovative reflective array antenna, an X-band transmitter for downlink and a C-band transmitter for uplink. The antenna array is "planar", meaning all of the elements are in one plane, yet provide a large aperture for beam steering and make possible high data rates. ATLAS Ground Networks will be the ground station for their uplink and downlink communications. Their telecomm package is called High-Rate CubeSat Communication System (HRCCS).
- Lunar Flashlight will map exposed water ice on the Moon
- Near-Earth Asteroid Scout by NASA is a solar sail spacecraft that will encounter a near-Earth asteroid
- BioSentinel is an astrobiology mission
- LunIR by Lockheed Martin Space
- Lunar IceCube, by the Morehead State University
- CubeSat for Solar Particles (CuSP)
- Lunar Polar Hydrogen Mapper (LunaH-Map), designed by the Arizona State University
- EQUULEUS, submitted by JAXA and the University of Tokyo
- OMOTENASHI, submitted by JAXA, is a lunar lander
- ArgoMoon, designed by Argotec and coordinated by Italian Space Agency (ASI)
- Cislunar Explorers, Cornell University, Ithaca, New York
- Earth Escape Explorer (CU-E3), University of Colorado Boulder
- Team Miles, by Fluid and Reason LLC, Tampa, Florida
- "NASA's large SLS rocket unlikely to fly before at least late 2021". Ars Technica. 17 July 2019. Retrieved 10 March 2021.
- John S. Sobtzak, Elie G. Tianang, Varun Joshi, Breana M. Branham, Neeti P. Sonth, Michael DeLuca, Travis Moyer, Kyle Wislinsky, and Scott E. Palo (2017). "A Deep Space Radio Communications Link for Cubesats: The CU-E3 Communication Subsystem". University of Colorado Boulder. Retrieved 10 March 2021.CS1 maint: uses authors parameter (link)
- "CU Earth Escape Explorer". University of Colorado Boulder. 2019. Retrieved 10 March 2021.
- Anderson, Gina; Porter, Molly (8 June 2017). "Three DIY CubeSats Score Rides on NASA's First Flight of Orion, Space Launch System". NASA. Retrieved 10 March 2021. This article incorporates text from this source, which is in the public domain.
- "CubeQuest Challenge Team Spotlight: CU-E3". Colorado Space News. 1 June 2017. Retrieved 10 March 2021.
- "CU-E3". Gunter's Space Page. 18 May 2020. Retrieved 10 March 2021.