Spectrum

Spectrum [Isar Aerospace]

Spectrum is a small liquid fueled orbital launch vehicle, which is being developed by Isar Aerospace, Germany.

Spectrum is a two-stage launch vehicle that is specifically designed for satellite constellation deployment. Payload capabilities of up to 1000 kg to low-earth orbit and a multi-ignition second stage engine enable flexible access to space for major satellite systems. Spectrum is designed to handle the most challenging mission parameters and offers engine-out capability on the first stage.

Spectrum has a principal diameter of 2 meter and a length of 22 meter. It uses propane and liquid oxygen for reduced environmental impact compared to common propellants. The engines are developed in-house. Stage 1 is propelled by a cluster of nine Aquila-SL engines. Stage 2 features one reignitable Aquila-Vac engine. Payload fairings with 1.8 meter and 2.5 m diameter are available.

A maiden flight was originaly planned for 2022. Andøya Space Center, Norway, has been selected as launch site. Eventually the maiden flight took place on 30 March 2025, but failed shortly after lift off. The second flight on 5 September 2026 was successful.

Version	Stage 1	Stage 2
Spectrum	Stage 1 / 9 × Aquila-SL	Stage 2 / 1 × Aquila-VAC

Performance (kg)	LEO	LPEO	SSO	GTO	GEO	MolO	IP
Spectrum	1000		700	-	-	-	-

No.  TypNo Type             Date            LS         Payload

 1    1    Spectrum         30.03.2025  F   AnS LP-A   Going Full Spectrum
 2    2    Spectrum         05.09.2026      AnS LP-A   Platform 6 / TRISAT-S / CyBEEsat / FramSat 1 / SpaceTeamSat 1 / Let It Go


Planned

 x    x    Spectrum         xx.xx.2028      AnS LP-A   ELSA-M
 x    x    Spectrum         xx.xx.2026      AnS LP-A   ΣYNDEO 3
 x    x    Spectrum         xx.xx.2026      AnS LP-A   Pelican TBD
 x    x    Spectrum         xx.xx.202x      AnS LP-A   (Airbus DS)
 x    x    Spectrum         xx.xx.202x      AnS LP-A   (DLR)
 x    x    Spectrum         xx.xx.202x      AnS LP-A   (DLR)
 x    x    Spectrum         xx.xx.2028      AnS LP-A   (SEOPS)


Launch sites:

AnS =    Andøya Spaceport, Andøya, Nordland, Norway   
Ko  =    Centre Spatial Guyanais (CSG), Kourou, French Guiana, France   / ELM-1


Failures:

Flight 1:

References:

Isar Aerospace: Spectrum

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