Soviet Space ProgramTsiklon-290/20, Baikonur Cosmodrome, Republic of Kazakhstan
I2P 4
Launched
October 23, 1970
Image: Ukrainian Space Agency
Summary
I2P 4 launched on a Soviet Space Program Tsiklon-2 from 90/20, Baikonur Cosmodrome, Republic of Kazakhstan on October 23, 1970. It was Soviet Space Program's 522nd launch, 69th this year and humanity's 1,144th orbital launch attempt. It was the 5th Tsiklon-2 flight and the 3rd this year. The payload was bound for low Earth orbit (LEO). Kosmos-374, one of 97 catalogued objects, reached a 537 × 1,060 km orbit inclined 63.0°. 97 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Tsiklon-2 · Soviet Space Program
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Low Earth Orbit (LEO)
- Milestone
- 5th Tsiklon-2 flight · 3rd this yearSoviet Space Program's 522nd launch69th this yearhumanity's 1,144th orbital launch attempt98th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-374 · NORAD 4594 · 1970-089 · Space-Track · tracking 1 of 97 objects
Show the numbers for orbit elements
- Object
- COSMOS 374
- Object ID
- 1970-089A
- Epoch
- 1970-10-23 07:51:15 UTC
- Mean motion
- 14.30146897 rev/day
- Eccentricity
- 0.036487
- Inclination
- 62.9595°
- Ascending node
- 129.295°
- Arg. of perigee
- 62.8917°
- Mean anomaly
- 300.8879°
- Element set
- 999
- Rev at epoch
- 2
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
97 catalogued: 1 payload, 96 debris; 19 still in orbit
- Kosmos-374 · NORAD 4594 · broke up October 23, 1970
Data from J. McDowell, planet4589.org
About this launch
The I2P satellites were the first soviet coorbital ASAT system.
Pad

90/20, Baikonur Cosmodrome, Republic of Kazakhstan
5th launch from 90/20, 1st this year · 305th from Baikonur Cosmodrome, Republic of Kazakhstan
23 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
303 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did I2P 4 launch?
I2P 4 launched on October 23, 1970. The time is known to the hour, not the minute.
Where can I watch I2P 4?
No webcast is on record for this launch.
What rocket launched I2P 4?
Tsiklon-2, flown by Soviet Space Program. Tsiklon-2 spec sheet
Where did I2P 4 launch from?
90/20, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did I2P 4 reach?
Kosmos-374, one of 97 catalogued objects, reached a 537 × 1,060 km orbit inclined 63.0°.
How many satellites did I2P 4 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
