NATO 4B (22921)

COSPAR: 1993-076A | Alt Name: NATO IVB

Image
NATO 4B Satellite Image
Additional Sources
Launch Details

Launch Date

December 8, 1993

Launch Pad

LC17A

Launch Vehicle

Delta 7925

Orbital Elements

NORAD ID

22921

International Designator

1993-076A

Epoch

Sat, 04 Jul 2026 02:11:31 GMT

Apogee

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Perigee

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Inclination

12.95°

Right Ascension

1.02°

Eccentricity

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Argument of Perigee

89.23°

Period

1461.68 min

Mean Motion

0.99 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

NATO 4B

Alternative Name

NATO IVB

Type

Payload

Status

Non-operational

Owner

NATO

Country

North Atlantic Treaty Organization

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 22921U 93076A   26185.09133161  .00000015  00000-0  00000-0 0  9993
2 22921  12.9503   1.0213 0001389  89.2254 283.9870  0.98516593118784

Source: Celestrak

Summary
NATO 4B, also known as NATO IVB, is a military communication satellite operated by NATO. Launched on December 8, 1993, from Launch Complex 17A at the Air Force Eastern Test Range (AFETR) using a Delta 7925 launch vehicle, it has a dry mass of 731 kg and a launch mass of 1430 kg. The satellite measures 2.1 meters in length with a diameter of 1.9 meters and spans 16 meters when its solar arrays are deployed. It is powered by two deployable solar arrays and batteries, equipped with four SHF transponders and two UHF transponders for communication purposes. NATO 4B was manufactured by BAES on an ECS-Bus configuration and has a designed lifetime of seven years.
Physical Characteristics

Length

2.1

Diameter

1.9

Span

16

Dry Mass

731

Launch Mass

1430

Shape

Box + 2 Pan

Radar Cross Section

14.1741

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

NATO 4B

Purpose

Military communication

Mission

Military communication

Manufacturer

BAES

Life Expectancy

7 years

Bus

ECS

Configuration

ECS-Bus

Motor

TE-M-700-19

Equipment

4 SHF transponders, 2 UHF transponders

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map
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