From Surf Wiki (app.surf) — the open knowledge base

Kosmos 27

Failed Soviet Venus impact probe

Field	Value
name	Kosmos 27
mission_type	Venus impact probe
operator	OKB-1
COSPAR_ID	1964-014A
SATCAT	00770
spacecraft_type	[3MV-1](3mv)
manufacturer	OKB-1
dry_mass	948 kg
(including an impact
probe of 285 kg)
launch_mass	6520 kg
launch_date	27 March 1964, 03:24:43 GMT
launch_rocket	Molniya 8K78
s/n T15000-22
launch_site	Baikonur, Site 1/5
launch_contractor	OKB-1
decay_date	28 March 1964
orbit_epoch	27 March 1964
orbit_reference	Geocentric
orbit_regime	Low Earth
orbit_periapsis	167 km
orbit_apoapsis	198 km
orbit_inclination	64.8°
orbit_period	88.7 minutes
apsis	gee
programme	Venera
previous_mission	Venera 3MV-1 No.2
next_mission	Venera 2

(including an impact probe of 285 kg)

s/n T15000-22

Kosmos 27 ( meaning Cosmos 27), also known as Zond 3MV-1 No.3 was a space mission intended as a Venus impact probe. The spacecraft was launched by a Molniya 8K78 carrier rocket from Baikonur. The Blok L stage and probe reached Earth orbit successfully, but the attitude control system failed to operate.

Launch

Kosmos 27 was launched at 03:24:43 GMT on 27 March 1964, atop a Molniya 8K78 s/n T15000-22 carrier rocket flying from Site 1/5 at the Baikonur Cosmodrome.

Spacecraft

Kosmos 27 was a "third-generation" deep space planetary probes of the 3MV series of the Soviet Union. The Soviet engineers planned four types of the 3MV, the 3MV-1 (for Venus impact), 3MV-2 (for Venus flyby), 3MV-3 (for Mars impact), and 3MV-4 (for Mars flyby). The primary difference over the second-generation was vastly improved (and in many cases doubled) orientation system elements as well as improved onboard propulsion systems. While these four versions were meant to study Mars and Venus.

Mission

The probe was the first dedicated 3MV spacecraft that the Soviets launched (earlier missions had been of the test "Object-Probe" versions as Kosmos 21). It was designed to accomplish atmospheric entry into Venus followed by descent and impact. On 27 March 1964, it had a perigee of 167 km and an apogee of 198 km, with an inclination of 64.8° and an orbital period of 88.7 minutes. The spacecraft successfully reached Earth orbit but failed to leave for Venus when the Blok L upper stage malfunctioned. The upper stage lost stable attitude due to a failure in the circuit of the power supply circuit that powered the valves for the attitude control system; hence, the stage remained uncontrollable and not ready to initiate a burn to leave Earth orbit. The problem was traced to a design error, the examination of telemetry data found that the failure was due to a design flaw in the circuitry of the BOZ unit, which resulted in power not being transferred to the attitude control jets on the Blok L stage, rather than one related to quality control. The spacecraft burned up in Earth's atmosphere the following day, on 28 March 1964. If successful, this mission would have been given a "Venera" designation.

References

https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-014A - 27 February 2020
https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1964-014A - 27 February 2020
"Venera 3MV-1".
(2018). "Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016". NASA History Program Office.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

kosmos-satellites venera-program spacecraft-launched-in-1964 spacecraft-which-reentered-in-1964 3mv

Want to explore this topic further?

Ask Mako anything about Kosmos 27 — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report