FLOCK 4S-4 (47491)

COSPAR: 2021-006CG | Alt Name: Flock 4s-4
DECAYED

Image
FLOCK 4S-4 Satellite Image
Additional Sources
Launch Details

Launch Date

January 24, 2021

Launch Pad

LC40

Launch Vehicle

Falcon 9

Orbital Elements

NORAD ID

47491

International Designator

2021-006CG

Decay Date

8/19/2024

Basic Satellite Info

Name

FLOCK 4S-4

Alternative Name

Flock 4s-4

Type

Payload

Status

Decayed

Owner

PLAN

Country

United States

Constellation

N/A

Related Satellites

Major Events

N/A

Summary
FLOCK 4S-4, also known as Flock 4s-4, is a CubeSat (3U) satellite built by PLAN and launched on January 24, 2021, from the AFETR site using a Falcon 9 launch vehicle at LC40. It has dimensions of 0.3 meters in length and width with a span of 0.3 meters, weighing approximately 5.7 kilograms both at launch and dry mass. Equipped with PS0, PS1 or PS2 imaging payload (Dove 242b), the satellite is powered by solar cells and batteries. Its mission pertains to technology, and it was deployed into an orbit where its estimated lifetime ranges from about one year in ISS orbits to 2-3 years in SSO orbits.
Physical Characteristics

Length

0.3

Diameter

0.1

Span

0.3

Dry Mass

5.7

Launch Mass

5.7

Shape

Box+2 pan

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Dove 242b

Purpose

Technology

Mission

Technology

Manufacturer

PLAN

Life Expectancy

~ 1 year (ISS orbit); 2-3 years (SSO)

Bus

Cubesat 3U

Configuration

CubeSat (3U)

Motor

None (most); FEEP (#Flock-3p')

Equipment

PS0, PS1 or PS2 imaging payload

Power System

Solar cells, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

X Report 27 Sep 2025

X Report 27 Sep 2025

SpaceX continues to make strides in both its Starship program and Starlink satellite deployments, with a successful launch of 24 Starlink satellites and preparations for upcoming missions.

Vulcan Booster Anomaly Under Scrutiny After USSF-87 Launch | KeepTrack Space Brief

Vulcan Booster Anomaly Under Scrutiny After USSF-87 Launch | KeepTrack Space Brief

ULA Vulcan faces scrutiny after solid booster anomaly on USSF-87 mission. ThinKom wins portable satellite ground station contract. Space Force starts Project Hecate for GPS past 2040.

Space Brief 14 Jul 2025

Space Brief 14 Jul 2025

Today's briefing covers the latest developments in satellite intelligence funding, new mandates affecting space launch and missile defense, and the early conclusion of a private astronaut mission. We also discuss Firefly Aerospace's plans to go public and stunning imagery from NASA's Parker Solar Probe.

X Report 31 Mar 2025

X Report 31 Mar 2025

New experiments in space agriculture begin with Fram2 mission, a historic polar orbit flight, and a Starlink launch postponement.

X Report 8 Nov 2025

X Report 8 Nov 2025

SpaceX prepares for its 560th Falcon 9 launch, aiming to deploy 29 Starlink satellites from Kennedy Space Center, while the Bandwagon-4 mission continues to showcase successful rocket landings.

X Report 16 Nov 2025

X Report 16 Nov 2025

SpaceX successfully launched 29 Starlink satellites on November 14, marking the first of two rapid-fire Falcon 9 missions from Florida's Space Coast in under four hours.

X Report 28 Dec 2024

X Report 28 Dec 2024

SpaceX wraps up a stellar year with Starship achievements and prepares for a lunar triple-shot in 2025.

Blue Origin's New Glenn Destroyed in Hotfire Anomaly | KeepTrack Space Brief

Blue Origin's New Glenn Destroyed in Hotfire Anomaly | KeepTrack Space Brief

Blue Origin lost New Glenn during static fire testing at Launch Complex 36. Vehicle sustained serious damage in anomaly. NASA Artemis timeline impacts possible.