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NewSpace Index

Concise original overview of commercial satellite constellations,
small satellite rocket launchers and NewSpace funding options.
Sister websites www.nanosats.eu and www.factoriesinspace.com

Interorbital Systems - NEPTUNE_100

Launcher name	NEPTUNE_100
Launcher status	Development
First launch	2026
Launch delay	First announced launch: 2012
Launch cost	$0.6M
Cost per kg	6000 $/kg
Performance	100 kg
Propellant type	Liquid, WFNA
Reusability	Not planned
Comment	Very few employees on LinkedIn.-0) As of May 2025, the first orbital rocket is now NEPTUNE_100 and 100 kg at $0.6M per launch. Before it was NEPTUNE and 225 kg and $1.35M.
Photos
Photo sources	[1]

Logo
Company	Interorbital Systems
Oneliner	Interorbital Systems (IOS) is a rocket, satellite, and spacecraft manufacturing company and launch-service provider founded in 1996 by Roderick and Randa Milliron.
Notes	Launch service seems risky due to very long delays. VCLS Demo 2 Source Selection Statement.
Funding	Yes
Location	US
Founded	1996
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Last modified: 2025-05-04

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