NAVSTAR 19 (USA 54) (20533)

COSPAR: 1990-025A | Alt Name: GPS II-7

Image

Additional Sources

Launch Details

Launch Date

March 26, 1990

Launch Site

Cape Canaveral Space Force Station

Launch Pad

LC17A

Launch Vehicle

Delta 6925

Orbital Elements

NORAD ID

20533

International Designator

1990-025A

Epoch

Sat, 04 Jul 2026 00:02:26 GMT

Apogee

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Perigee

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Inclination

53.46°

Right Ascension

244.92°

Eccentricity

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Argument of Perigee

227.29°

Period

753.77 min

Mean Motion

1.91 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

NAVSTAR 19 (USA 54)

Alternative Name

GPS II-7

Type

Payload

Status

Non-operational

Owner

AFSSD2

Country

United States

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 20533U 90025A   26185.00169141  .00000028  00000-0  00000-0 0  9993

2 20533  53.4612 244.9177 0046957 227.2903 131.2250  1.91038685255339

Source: Celestrak

Summary

NAVSTAR 19 (USA 54), also known as GPS II-7, is a navigation satellite belonging to the US's Global Positioning System constellation. Launched on March 26, 1990, from Launch Complex 17A at Cape Canaveral Air Force Station using a Delta 6925 launch vehicle, it has a dry mass of 776 kg and measures 2.4 meters in length with a diameter of 1.8 meters and a span of 5.3 meters due to its solar arrays. The satellite is equipped with two deployable solar arrays for power generation and batteries as backup. It was manufactured by RWISB and is configured with 3-axis stabilization, making it part of the GPS II series. NAVSTAR 19 operates in a box shape with two panels and has an RCS value of 0.6015. Its mission duration is estimated at 7.5 years, serving as part of the AFSSD2's constellation for navigation purposes.

Physical Characteristics

Length

2.4

Diameter

1.8

Span

5.3

Dry Mass

776

Launch Mass

776

Shape

Box + 2 Pan

Radar Cross Section

0.6015

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

GPS SVN 20

Purpose

Navigation

Mission

Navigation

Manufacturer

RWISB

Life Expectancy

7.5 years

Bus

GPS II

Configuration

3-Axis stabilized

Motor

Star 37F

Equipment

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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