Official name COSMOS 2520
Alternative name Cosmos-2520
Cospar ID 2017-046A
Norad ID 42907
Launch date 2017-08-16
Launch site TTMTR
Launch vehicle Proton-M Briz-M (Ph.3)
Country/Organization Russia
Type application Communication
RCS size UNKNOWN
Decay date ON ORBIT
Period (min) 1436.11
Inclination (deg) 0.02
Perigee (km) 35786
Apogee (km) 35788
Eccentricity 2.79431078324531E-05
Mean motion (revs. per day) 1.00270870615761
Semi-Major axis (km) 42165.135
Raan (deg) 111.6758
Arg of perigee (deg) 317.9829
Shape Cyl + 2 Pan
Mass (kg) 2500
Diameter (m) 2
Height (m) 6
Span (m^2) 27
Lifetime 15 years
Contractors ISS Reshetnev (prime)
Configuration Ekspress-2000
Power 2 deployable solar arrays, batteries

Blagovest is a series of four planned communications satellites for Russian domestic services.

The spacecraft and the payload is built by Russian ISS Reshetnev based on the Ekspress-2000 bus.

The first satellite, Kosmos 2520, was launched on a Proton-M Briz-M (Ph.3) rocket from Baikonur in August 2017.

Satellite COSPAR Date LS Launch Vehicle Remarks
COSMOS 2520 2017-046A 2017-08-16 TTMTR Proton-M Briz-M (Ph.3)
COSMOS 2526 2018-037A 2018-04-18 TTMTR Proton-M Briz-M (Ph.3)
COSMOS 2533 2018-107A 2018-12-21 TTMTR Proton-M Briz-M (Ph.3)
COSMOS 2539 2019-048A 2019-08-05 TTMTR Proton-M Briz-M (Ph.3)