4MV

The 4MV planetary probe (short for 4th-generation Mars-Venus probe) is a designation for a common design used for Soviet unmanned probes to Mars and Venus. It was an incremental improvement of earlier 3MV probes and was used for Mars missions 4 to 7 and Venera missions 9 to 16. The same base design was used for some earth-orbiting space observatories.[1]

M-71 - 3MS version
M-73 - 3MP version
Astron

Design

The spacecraft bus has a height of 2.8 meters (9 ft 2 in) and a solar panel span of 6.7 meters (22 ft). The central section of the bus has a diameter of about one meter (3 ft 3 in) and contained propellant. The main engine (KRD-425A) is encircled by a conical instrument compartment with the diameter of 2.35 meters (7 ft 9 in) at the base.[2]

Variants

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gollark: See, that bit here says <@319753218592866315>, <@!258639553357676545> has sent you a scheduled ping.
gollark: !pingwhen online <@319753218592866315>
gollark: No, I mean, on the message telling you you sent one, it pings the other person.
gollark: * them

References

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