Hellenic Space Dawn
Greek CubeSat mission
From Wikipedia, the free encyclopedia
Hellenic Space Dawn (HSD) is a Greek space mission aiming to demonstrate communication technologies and on-board data processing for Earth observation applications.[1][2][3][4] The mission consist of two 8U CubeSat-type small satellites (Helios and Selene) equipped with laser communication terminals.[3] HSD was launched on 3 May 2026.[2][5][6][7][8][9]
EMTech Space, Hellenic Space Center, 
European Space Agency| Operator | EMTech Space, Hellenic Space Center, European Space Agency |
|---|---|
| Website | https://hsd.emtech.global |
| Spacecraft properties | |
| Spacecraft type | 2x 8U CubeSat |
| Start of mission | |
| Launch date | 3 May 2026, 7:00 UTC |
| Rocket | Falcon 9 (CAS500-2 mission) |
| Launch site | SLC-4E |
| Contractor | SpaceX |
Background
The mission was developed by the Greek group of companies EMTech Space with the support of the EU's and ESA's Greek CubeSat In-Orbit Validation programme.[2] The two spacecraft are based on the CubeSat bus developed by the Bulgarian company EnduroSat.[10] The mission's laser terminals were built by AAC Clyde Space.[11] The mission uses the EASE-Rise ground mission control solution by Telespazio Germany.[12]
