FLOCK 4S-1 (47543)

COSPAR: 2021-006ED | Alt Name: Flock 4s-1
DECAYED

Image
FLOCK 4S-1 Satellite Image
Additional Sources
Launch Details

Launch Date

January 24, 2021

Launch Pad

LC40

Launch Vehicle

Falcon 9

Orbital Elements

NORAD ID

47543

International Designator

2021-006ED

Decay Date

8/16/2024

Basic Satellite Info

Name

FLOCK 4S-1

Alternative Name

Flock 4s-1

Type

Payload

Status

Decayed

Owner

PLAN

Country

United States

Constellation

N/A

Related Satellites

Major Events

N/A

Summary
FLOCK 4S-1 is a CubeSat (3U) technology satellite owned and manufactured by PLAN in the United States. Launched on January 24, 2021, from LC40 at AFETR using a Falcon 9 launch vehicle, it has dimensions of 0.3 meters in length, 0.1 meters in diameter, and spans 0.3 meters. The satellite's dry mass is 5.7 kilograms, which is the same as its launch mass. It is equipped with PS0, PS1 or PS2 imaging payload known as Dove 2436 for technology purposes. Its power source consists of solar cells and batteries. FLOCK 4S-1 has a shape described as "Box+2 pan" without any motor specified except for some units in the #Flock-3p' series that use FEEP propulsion systems. The expected lifetime is approximately one year in an ISS orbit or two to three years in SSO (Sun-Synchronous Orbit).
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 2436

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 20 Apr 2025

X Report 20 Apr 2025

SpaceX is preparing for significant infrastructure expansion in Texas and Florida to support Starship, launches its third NRO mission in a week, and faces regulatory scrutiny from the Bahamas.

X Report 15 May 2025

X Report 15 May 2025

SpaceX successfully launched 28 Starlink satellites from Cape Canaveral, while Starship prepares for its ninth test flight next week.

Space Brief 26 Feb 2025

Space Brief 26 Feb 2025

Today's brief covers the crash of a SpaceX Falcon 9 rocket over Europe, the Space Force's mapping efforts with Iron Dome, and key military appointments and funding decisions.

White House Orders Space Nuclear Power by 2028 | KeepTrack Space Brief

White House Orders Space Nuclear Power by 2028 | KeepTrack Space Brief

White House directs NASA and Pentagon to field space nuclear power systems by 2028, with DoD demonstration required by 2031. Game-changer for military satellite power budgets.

X Report 28 Jun 2025

X Report 28 Jun 2025

SpaceX continues to dominate with two Starlink launches in one day, the unveiling of its final Crew Dragon, and facing legal challenges from Mexico regarding a recent Starship incident.

X Report 14 Dec 2025

X Report 14 Dec 2025

On December 14, 2025, SpaceX achieved a significant milestone with its 550th booster landing following the launch of 27 new Starlink satellites, while exploring potential IPO strategies to fund future projects.

The Day Fiery Failure Launched NASA

The Day Fiery Failure Launched NASA

Sixty-eight years ago, America's first satellite exploded on the launchpad in front of the entire world. But from the ashes of Vanguard TV-3 came the determination that would eventually win the Space Race.

Space Brief 28 Sep 2025

Space Brief 28 Sep 2025

Today's highlights include China's latest satellite launches, Blue Origin's expansion plans, and Purdue University's groundbreaking suborbital mission with Virgin Galactic.