Editing Mars 1M (section)

==Spacecraft and subsystems==
NASA describes the spacecraft as:
<blockquote>nearly identical to the [[Venera 1]] design, a cylindrical body about 2 meters high with two [[Photovoltaic module|solar panel]] wings, a 2.33 meter high-gain net antenna, and a long antenna arm, and had a mass of about 650 kg. It carried a 10 kg science payload consisting of a [[magnetometer]] on a boom, [[cosmic ray]] counter, [[plasma-ion trap]], a [[radiometer]], a [[micrometeorite]] detector, and a [[spectroreflectometer]] to study the CH band, a possible indicator of [[life]] on Mars. These instruments were mounted on the outside of the spacecraft. A [[photo-television camera]] was held in a sealed module in the spacecraft and could take pictures through a viewport when a sensor indicated the Sun-illuminated martian surface was in view.
Attitude was controlled by a Sun-star sensor with attitude correction performed by a [[unsymmetrical dimethylhydrazine|dimethylhydrazine]]/[[nitric acid]] [[bipropellant rocket]] engine. The spacecraft orientation was to be maintained so that the solar panels faced the Sun throughout the flight. Power was provided by the two-square meter solar panels which charged [[Silver-oxide battery|silver-zinc batteries]]. Radio communications were made using a decimeter band transmitter via the high gain antenna for spacecraft commands and telemetry. Radio bearing was used to maintain the antennas' orientation to Earth. Images were to be transferred using an 8-cm wavelength transmitter through the [[High Gain Antenna|high-gain antenna]]. A fourth stage was added to the booster, the Molniya (rocket) or 8K78, the new launcher was designated SL-6/A-2-e.<ref>{{cite web | url = https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=MARSNK2 | title = Marsnik 2 | publisher = NASA | accessdate = 2009-06-11}} (public domain)</ref></blockquote>