Press Release


Re-entry of the Solar X-ray Observatory "Yohkoh" (SOLAR-A) to the Earth's Atmosphere

September 8, 2005 (JST)

Japan Aerospace Exploration Agency (JAXA)

The Solar X-ray Observatory "Yohkoh" (SOLAR-A) is soon to re-enter the earth's atmosphere as it has completed its on-orbit life. It is analyzed that the frame of the Yohkoh will be burned and vanish at re-entry; therefore it will not fall to earth.

The Yohkoh was launched aboard M-3S-II Launch Vehicle Flight No. 6 on August 30, 1991, from the Uchinoura Space Center by the former Institute of Space and Astronautical Science of the then Ministry of Education (currently Japan Aerospace Exploration Agency or JAXA) .

Because of the change in atmosphere density due to the Sun, it is impossible to predict the exact time and location of the re-entry. However, it is currently expected to happen around September 12, 2005 (Japan Standard Time, JST).

We will provide you with information about the re-entry as soon as it is confirmed.

For your information, Yohkoh's orbit at 2:57 a.m. on September 8, 2005 (JST), is as follows.

Yohkoh Orbit Data (at 2:57 a.m. on Sep. 8, 2005, JST)

Apogee altitude 247.7 Km
Perigee altitude 242.4 Km
Inclination 31.3 degrees
Period 89.3 minutes

For inquiries:
JAXA Public Affairs Department
Tel: +81-3-6266-6413 to 7, Fax: +81-3-6266-6910