CNUSail-1 (Papillon) [Chungnam National University]
Official name OBJECT Y
Alternative name CNUSail 1
Cospar ID 2018-004Y
Norad ID 43133
Launch date 2018-01-12
Launch site SRI
Launch vehicle PSLV-XL
Country/Organization South Korea
Type application Technology
Operator Chungnam University
RCS size SMALL
Decay date 2024-03-28
Shape Box + 1 Sail
Mass (kg) 4
Height (m) 0.3
Width (m) 0.1
Depth (m) 0.1
Span (m^2) 2.8
Lifetime 3 months
Contractors Chungnam University
Equipment Solar sail
Propulsion None
Configuration CubeSat (3U)
Power Solar cells, batteries

CNUSail 1 (Chungnam National University Sail) or Papillon is a solar sail experiment based on a 3U cubesat developed at the Chungnam National University, South Korea.

The purpose of the CNUSAIL-1 is to successfully deploy the solar sail in Low Earth Orbit (LEO) and to perform de-orbiting using the sail membrane as a drag-sail. Deployment systems consist of quadrant sail membranes, four steel booms, and a spiral torsional. To produce high propellant, Kapton sheet with ultra-thin thickness (about 0.25 µm) is prepared as the sail membranes. The proposed Steel booms are C-shaped with 0.2 mm wall thickness and have a weight of 72 g per meter. The booms in the CNUSAIL-1 have 1.42 m length when fully deployed.

The satellite was to be launched as a secondary payload on a Falcon-9 v1.2 rocket, but was later moved to a PSLV-XL rocket. It wass expected to operate for three months.

Launch and deployment was successful, but the satellite apparently failed to work.

Satellite COSPAR Date LS Launch Vehicle Remarks
OBJECT Y 2018-004Y 2018-01-12 SRI PSLV-XL with Cartosat 2F, Microsat-TD, LEO Vantage 1, Carbonite 2, ICEYE X1, INS 1C, Arkyd 6A, CICERO 7, Landmapper-BC 3 v2, Lemur-2 68, ..., 71, Flock-3p' 1, ..., 4, MicroMAS 2a, PicSat, CANYVAL-X 1, 2, KAUSAT 5, SIGMA, DemoSat 2, GeoStare, Fox 1D, STEP Cube Lab, SpaceBEE 1, ..., 4