Kairos

Kairos Rocket No.3 is an attempt to achieve Japan's first privately developed rocket orbital insertion.

KAIROS attracted interest from the Japanese Ministry of Defense.

Kairos Rocket No.3 will carry five satellites to a 500-kilometer polar sun-synchronous orbit.

The scheduled launch time for KAIROS Rocket No.3 is 11:00:00 on March 1, 2026.

Kairos No.2 launched in December 2024 reached an altitude of 110 kilometers but was judged unable to complete its mission and a flight termination measure was taken.

The Kairos rocket is a three-stage solid-fuel rocket equipped with a liquid-propulsion kick stage called PBS to improve orbital insertion accuracy.

Kairos can deliver approximately 250 kilograms to low Earth orbit (LEO) and approximately 150 kilograms to sun-synchronous orbit (SSO).

Kairos No.3 will carry the approximately 70-kilogram ultra-small satellite TATARA-1R built by TerraSpace of Kyotanabe, Kyoto as a payload.

Space One originally scheduled the Kairos third vehicle for launch on February 25 but postponed February launches after a weather analysis.

Space One will launch its Kairos third vehicle on March 1 at 11:00 local time.

Space One postponed the KAIROS Rocket No.3 launch on February 22, 2026 prior to setting the March 1, 2026 date.

Kairos No.3 will carry the 3U cubesat SC-Sat1a built by Space Cubics of Chuo-ku, Sapporo as a payload.

Kairos has a height of about 18 meters and a gross liftoff mass of about 23 tons.

The launch window for KAIROS Rocket No.3 is 11:00:00–11:20:00 on March 1, 2026.

Space One (スペースワン株式会社) scheduled the KAIROS Rocket No.3 launch for March 1, 2026.

The exact launch time for KAIROS Rocket No.3 may be reset within the 11:00:00–11:20:00 launch window.

Kairos No.3 will carry the 3U cubesat AETS-1 built by ArcEdge Space of Koto-ku, Tokyo as a payload.

Kairos No.3 will carry the student-developed satellite Hiroo Engineering for Orbit (HErO) built by students at Hiroo Gakuen in Minato-ku, Tokyo as a payload.