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Today's Space Brief covers the inaugural national security mission of ULA's Vulcan Centaur, the Space Force's 2026 budget insights, and shifts in military drone technology.
SENTINEL-3B (43437)
COSPAR: 2018-039A | Alt Name: Sentinel-3B
Image
Additional Sources
Launch Details
Launch Date
April 25, 2018
Launch Site
PLMSC
Launch Pad
LC133/3
Launch Vehicle
Rokot
Orbital Elements
NORAD ID
43437
International Designator
2018-039A
Epoch
Sat, 04 Jul 2026 03:52:02 GMT
Apogee
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Perigee
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Inclination
98.62°
Right Ascension
252.45°
Eccentricity
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Argument of Perigee
117.33°
Period
100.93 min
Mean Motion
14.27 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
SENTINEL-3B
Alternative Name
Sentinel-3B
Type
Payload
Status
Operational
Owner
COPERN/ESA
Country
EU
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 43437U 18039A 26185.16113559 .00000140 00000-0 76024-4 0 9993
2 43437 98.6242 252.4495 0000880 117.3347 242.7924 14.26739740426541
Source: Celestrak
Summary
Sentinel-3B is an Earth observation satellite (Ocean) launched on April 25, 2018, from Plesetsk Cosmodrome using a Rokot launch vehicle. The spacecraft has dimensions of 3.7 meters in length and 2.2 meters in diameter with a span of 5 meters, featuring a dry mass of 1150 kilograms. It is powered by deployable solar arrays and batteries, and equipped with OLCI, SLSTR, SRAL, MWR, GNSS receiver, laser tracking mirror, Doris receiver for its mission operations. The satellite was manufactured by THALES and operated under the ownership of COPERN/ESA. Its mission lifetime is projected to last 7 years.
Physical Characteristics
Length
3.7
Diameter
2.2
Span
5
Dry Mass
1150
Launch Mass
1250
Shape
Box + 1 pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Sentinel-3B
Purpose
Earth observation (Ocean)
Mission
Earth observation (Ocean)
Manufacturer
THALES
Life Expectancy
7 years
Bus
Sentinel-3A
Configuration
Prima Bus
Motor
Unknown
Equipment
OLCI, SLSTR, SRAL, MWR, GNSS receiver, laser tracking mirror, Doris receiver
Power System
Deployable solar array, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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