STARLINK-2251 (48594)

COSPAR: 2021-041AT | Alt Name: Starlink 2251

Image
STARLINK-2251 Satellite Image
Additional Sources
Launch Details

Launch Date

May 15, 2021

Launch Pad

LC39A

Launch Vehicle

Falcon 9

Orbital Elements

NORAD ID

48594

International Designator

2021-041AT

Epoch

Fri, 03 Jul 2026 17:35:24 GMT

Apogee

Calculating...

Perigee

Calculating...

Inclination

53.16°

Right Ascension

295.22°

Eccentricity

Calculating...

Argument of Perigee

84.58°

Period

94.16 min

Mean Motion

15.29 rev/day

Latitude

Calculating...

Longitude

Calculating...

Altitude

Calculating...

Velocity

Calculating...

Polar Plot
3D Visualization
Basic Satellite Info

Name

STARLINK-2251

Alternative Name

Starlink 2251

Type

Payload

Status

Operational

Owner

SPXS

Country

United States

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 48594U 21041AT  26184.73292426 -.00000698  00000-0 -11863-4 0  9992
2 48594  53.1600 295.2166 0000960  84.5840 275.5270 15.29356335283218

Source: Celestrak

Summary
STARLINK-2251 is a Starlink satellite operated by SpaceX (SPXS), with an OBJECT_ID of 2021-041AT and a NORAD_CAT_ID of 48594. Launched on May 15, 2021, from the Kennedy Space Center's LC39A launch pad using a Falcon 9 rocket, this satellite is primarily used for communication purposes. It has dimensions of 0.2 meters in length and a diameter of 2.8 meters with a span of 9 meters. The dry mass of STARLINK-2251 is 248 kilograms, while its launch mass was 260 kilograms. Equipped with a Ku/Ka-band payload and optical inter-satellite links (part of a few prototypes), it utilizes solar arrays and batteries for power and employs krypton ion thrusters for propulsion. The satellite's shape consists of a box with a pan configuration, and its mission is to facilitate communication services as part of SpaceX’s Starlink constellation.

Starlink is a satellite constellation developed by SpaceX with the aim of providing global broadband internet coverage. Thousands of small satellites are deployed in low Earth orbit (LEO), enabling high-speed internet access even in remote areas. However, the rapid increase in satellites raises concerns about space debris and the potential for collisions, which can lead to further debris creation and endanger other spacecraft. Additionally, the sheer number of Starlink satellites can affect astronomical observations by increasing light pollution. Proper deorbiting plans and international coordination are essential to mitigate these challenges and ensure long-term sustainability in space.
Physical Characteristics

Length

0.2

Diameter

2.8

Span

9

Dry Mass

248

Launch Mass

260

Shape

Box + pan

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Starlink V1.0-L26-42

Purpose

Communication

Mission

Communication

Manufacturer

SPXS

Life Expectancy

Unknown

Bus

Starlink

Configuration

Unknown

Motor

Krypton ion thrusters

Equipment

Ku/Ka-band payload (all), optical inter-satellite links (a few prototypes)

Power System

Solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map
This tool will help you track the satellite's position and predict its upcoming passes over your location. Simply input the coordinates or click the geolocation button to get started.
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

X Report 10 Jun 2025

X Report 10 Jun 2025

Exciting advancements from SpaceX include the debut of a new Dragon capsule for Axiom Space, continued Starlink deployments, and significant shifts in U.S. rural broadband funding that could benefit Starlink.

SpaceX Preps First February Starlink Launch, Orbital Data Centers Gain Traction | KeepTrack X Report

SpaceX Preps First February Starlink Launch, Orbital Data Centers Gain Traction | KeepTrack X Report

SpaceX readies Starlink 17-32 launch of 25 satellites from Vandenberg. Orbital data center economics draw attention from Musk and Bezos. 9,614 Starlink sats on orbit.

X Report 15 Aug 2025

X Report 15 Aug 2025

SpaceX achieves significant milestones with multiple satellite launches and ongoing challenges in rural broadband funding. Noteworthy advances in Starlink capabilities enhance international connectivity.

X Report 13 Nov 2025

X Report 13 Nov 2025

Today's report covers SpaceX's progress on Starship pad realignment and Rocket Lab's delay of its Neutron rocket debut, highlighting key advancements and competitive dynamics in the space industry.

X Report 23 Nov 2025

X Report 23 Nov 2025

SpaceX continues its robust launch cadence with new Starlink deployments and faces challenges in Starship development following the recent damage to its prototype booster.

LeoLabs and the Business of Watching Everything

LeoLabs and the Business of Watching Everything

A startup built on Cold War-era radar science now tracks 25,000 objects in orbit - and the Pentagon can't get enough of it. But can its radars really compete with the Space Surveillance Network?

NASA OIG Flags Starship Artemis Gaps as Falcon 9 Eyes 8-Launch Week | KeepTrack X Report

NASA OIG Flags Starship Artemis Gaps as Falcon 9 Eyes 8-Launch Week | KeepTrack X Report

NASA's Inspector General warns of crew survival analysis gaps in Starship lunar lander program as Falcon 9 prepares to lead 8 global launches this week.

X Report 21 Oct 2025

X Report 21 Oct 2025

NASA considers opening the Artemis 3 lander to new bids as delays surface, while SpaceX gears up for multiple Falcon 9 launches this week and secures a redevelopment nod for SLC-6.