Relek [Roskosmos]
Official name MKA PN2 (RELEK)
Alternative name Relek (MKA-PN 2)
Cospar ID 2014-037B
Norad ID 40070
Launch date 2014-07-08
Launch site TTMTR
Launch vehicle Soyuz-2-1b Fregat
Country/Organization Russia
Type application Science, solar cosmic rays, magnetosphere
RCS size LARGE
Decay date ON ORBIT
Period (min) 99.06
Inclination (deg) 98
Perigee (km) 619
Apogee (km) 808
Eccentricity 0.132445690259285
Mean motion (revs. per day) 14.5366444579043
Semi-Major axis (km) 7091.635
Raan (deg) 128.2689
Arg of perigee (deg) 294.8965
Shape Box
Mass (kg) 120
Height (m) 1
Width (m) 1
Depth (m) 1
Span (m^2) 1
Lifetime 3 years (planned); 5 months (achieved)
Contractors NPO Lavochkin
Propulsion APPT-45-2 thruster
Configuration Karat-Bus
Power 3 deployable, fixed solar arrays, batteries

Relek (Relyativistskiye Elektrony, Релятивистские электроны) or MKA-PN 2 is a Russian microsatellite featuring a magnetospheric scientific payloads:

The Relek payload is to study electron precipitation.

Relek is based on Lavochkin's Karat microsatellite bus. Originally the satellite was also to feature the Monika payload to study solar cosmic rays, but this experiment has been discontinued in 2012. Monika is now planned to fly at a later date on a different platform.

In December 2014 the satellite was renamed Vernov after Soviet physicist Sergei Vernov. Shortly after, the satellite failed to communicate with the ground station. It ceased operations after just five months in orbit, instead of planned three years.

Satellite COSPAR Date LS Launch Vehicle Remarks
MKA PN2 (RELEK) 2014-037B 2014-07-08 TTMTR Soyuz-2-1b Fregat with Meteor-M 2, TechDemoSat 1, SkySat 2, DX 1, AISSat 2, UKube 1, M3MSat-Dummy