India's 20 Satellites in Crowded Orbit Face Rising Collision Threat

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Twenty of India’s 22 active satellites are in low Earth orbit (LEO) and face heightened collision risks due to space debris crowding, the government told Parliament on August 5, 2026. ISRO has already executed 29 collision avoidance manoeuvres (CAMs) in the past 18 months to protect these assets.

ISRO executed 20 CAMs in year 2025 and 9 in year 2026, till date. Thousands of satellites (Starlink, OneWeb, etc.) crowd LEO, increasing collision probability. Over 150,000 close approach alerts were evaluated by ISRO in 2025 alone.

A CAM is a controlled manoeuvre where a satellite’s orbit is slightly altered to avoid a predicted collision.A trigger is initiated when tracking systems (like ISRO’s MOTR radar or global alerts) detect a conjunction event — a close approach between two objects. The outcome of these CAMs is that the satellite is steered safely away from debris or another spacecraft, ensuring mission continuity.

Without CAMs, even a small debris fragment could destroy or disable a satellite. Each manoeuvre consumes fuel, shortening satellite lifespan — so CAMs are used only when risk is significant.

Key Facts from Parliament Briefing

• Satellites at risk: 20 Indian satellites in LEO (below 2,000 km altitude) are more vulnerable compared to geostationary satellites.
• Collision avoidance manoeuvres:
  • 2025: 20 CAMs executed
  • 2026 (till August): 9 CAMs executed
  • Total (last 18 months): 29 CAMs
• Tracking systems: Sriharikota MOTR radar tracks large LEO objects. Hanle optical telescope (Ladakh) under the NETRA project is nearing completion; will track objects ≥30 cm at GEO altitude.
• Policy framework: IN-SPACe is drafting guidelines on state liability and insurance for damages caused by Indian space objects.

India’s Global Role in Space Debris Mitigation

• Active participant in Inter-Agency Debris Coordination Committee (IADC), UN Long-Term Sustainability Working Group (UN-LTS), and International Astronautical Federation (IAF) debris groups.
• Contributed to revised IADC debris mitigation guidelines with technical inputs.
• Announced Debris-Free Space Mission (DFSM) in 2024, aiming for zero debris from Indian government and private missions.

Collision Risk Overview

Factor	Impact on Indian Satellites
Space debris density	LEO is the most crowded orbital zone (<2000 km).
Satellite population	20 of 22 active Indian satellites are in LEO.
Close approach alerts	ISRO evaluated 150,000+ alerts in 2025 alone.
Mitigation actions	29 CAMs executed in 18 months.
Tracking infrastructure	MOTR radar + upcoming NETRA optical telescope.

Risks & Challenges

• Collision probability rising as more satellites (including mega-constellations like Starlink and OneWeb) crowd LEO.
• Insurance & liability gaps remain unresolved; India is still finalizing its framework.
• Dependence on global alerts means India must strengthen indigenous tracking capacity.

What’s Next

• Hanle telescope completion will significantly improve India’s GEO monitoring.
• Policy adoption by IN-SPACe will clarify liability for third-party damages.
• Debris-Free Space Mission (DFSM) aims to set India apart as a responsible spacefaring nation.

Assam to Have India’s 1st Space Junk Monitoring Radar Under ISRO’s Project Netra

Assam is set to host India’s first space debris monitoring radar under ISRO’s Project Netra. The radar will be established in Chandrapur, near Guwahati, and will be capable of detecting objects as small as 10 cm within a range of 2,000 km. This initiative is part of ISRO’s broader effort to enhance space situational awareness and safeguard India’s growing satellite assets.

The project is expected to be completed within a year and represents an investment of approximately ₹1,000 crore. The state government has allotted 200 bighas of land for the facility and assured. Once operational, it will significantly reduce India’s dependence on foreign sources for tracking space.

This news comes within a month after Assam's state government has announced that it is gearing up to launch its own satellite system, ASSAMSAT, with technical assistance from ISRO.

India has been making significant strides in space debris monitoring and mitigation, but it still lags behind some of the more established spacefaring nations in terms of infrastructure and investment.

It was in April 2022, when ISRO announced that it aims to attain self-reliance in safeguarding the valuable space assets, ISRO will establish Space Surveillance and Tracking network with RADARS and Optical Telescopes under the project Network for Space Objects Tracking and Analysis (NETRA).

Project Netra is India’s initiative for space situational awareness (SSA), which includes radar and optical telescopes to track debris.

India aims to eliminate debris from all its space missions by 2030, setting a global precedent.

India has Space Situational Awareness Control Centre, which was established in 2020 to serve as India’s hub for monitoring space traffic.

World’s First Image of Space Debris Captured By Japan's AstroScale

Astroscale Japan Inc., a subsidiary of Astroscale Holdings Inc., has unveiled the first publicly released image of space debris captured through rendezvous and proximity operations (RPO).

This historic image was taken by their commercial debris inspection demonstration satellite called Active Debris Removal by Astroscale-Japan (ADRAS-J).

The ADRAS-J spacecraft was selected by Japanese space agency JAXA for Phase I of its Commercial Removal of Debris Demonstration (CRD2) program. Astroscale Japan is responsible for the design, manufacture, test, launch and operations of ADRAS-J.

ADRAS-J is designed to demonstrate the feasibility of capturing and removing space debris from orbit. Its primary goal is to test technologies and techniques for safe and efficient debris removal.

The ADRAS-J spacecraft successfully approached a rocket upper stage, which is a piece of space debris, from several hundred meters behind it. This achievement marks a crucial step toward understanding and addressing the challenges posed by space debris, driving progress toward a safer and more sustainable space environment.

ADRAS-J uses advanced sensors, navigation systems, and robotic arms for its operations. These technologies are crucial for safe and precise maneuvers around space debris.

Astroscale collaborates with space agencies, industry partners, and international organizations to promote responsible space practices and develop effective debris removal strategies.

How ADRAS-J capture and remove space debris?

The ADRAS-J spacecraft employs innovative techniques to capture and remove space debris as depicted below —

1. Rendezvous and Proximity Operations (RPO)

ADRAS-J approaches the target space debris object using precise navigation and control systems. It performs close flybys to inspect the debris and assess its condition.

2. Capture Mechanism

ADRAS-J spacecraft is equipped with a robotic arm or a net system. The robotic arm can grapple onto the debris, securing it for removal. Alternatively, the net system envelops the debris, capturing it.

3. Deorbit Maneuvers

Once captured, ADRAS-J initiates deorbit maneuvers. These maneuvers alter the debris' orbit, gradually bringing it closer to Earth.

Eventually, the debris re-enters Earth's atmosphere and burns up.

4. Safe Disposal

ADRAS-J ensures that the debris re-enters over uninhabited areas (such as oceans) to minimize risk. The controlled re-entry prevents the debris from becoming additional space junk.

While active debris removal is still an ongoing challenge, there have been some notable efforts and achievements. The RemoveDEBRIS mission, led by the University of Surrey in collaboration with industry partners, successfully demonstrated several debris removal technologies. In 2018, it deployed a net to capture a simulated piece of space debris and used a harpoon to pierce a target panel. These tests validated the feasibility of capturing and deorbiting debris.

Elon Musk's SpaceX Starlink Satellite actively manages its satellites to avoid collisions and reduce space debris. When a defunct Starlink satellite (Darksat) was no longer operational, SpaceX intentionally deorbited it to prevent it from becoming space junk.

Similarly, the European Space Agency (ESA) is planning the e.Deorbit mission. e.Deorbit aims to capture a defunct satellite and safely deorbit it. The mission will demonstrate key technologies for active debris removal.

International organizations, space agencies, and private companies are increasingly working together to address space debris.

Initiatives like the Space Data Association (SDA) facilitate coordination among satellite operators to prevent collisions.

Space Tech Startup Digantara Raises $10 Mn in Series A Funding Led by Peak XV Partners

Indian Institute of Science (IISc) -incubated space technology company Digantara has raised $10 million in Series A funding round led by Peak XV Partners (formerly Sequoia Capital India and Southeast Asia). Kalaari Capital also participated in this round, reported media outlets including Tech Crunch and Mint.

This is notably the first space-tech investment by the Sequoia and also the first official funding announcement since restructuring from Sequoia India.

Founded in December 2018 by Indian engineers Anirudh Sharma, Rahul Rawat and Tanveer Ahmed, Digantara has raised $12.5 million till date, including the seed round of $2.5 million from Kalaari Capital in July 2021.

Digantara will use the freshly raised funds to build its commercial space situational awareness satellites, as part of its infrastructure as well as to expand its team and set up a new office in Bengaluru.

Digantara, which specializes in space weather and space debris-tracking, is building its space data mapping service. 

Digantara has successfully launched its second satellite named Pushan-Alpha onboard SpaceX's Transporter 6 mission on January 3.

Bengaluru-based Digantara is a space situational awareness company that is developing an end-to-end infrastructure to address the difficulties of space operations and space traffic management through its pioneering Space - Mission Assurance Platform a.k.a. Space-MAP, which will serve as a one stop solution for all space operations with products offered through a data feedback loop using multi modal data sets. This platform will be as powerful and sophisticated as Google Maps, serving as a foundational layer for space operations and astrodynamics research.

Digantara is presently working with the Indian space agency Indian Space Research Organisation (ISRO) to source satellite data, among others.

In January, Digantara was recognised as Winner under “Space” category by Startup India for their efforts towards building sovereign SSA capability at National Startup Awards 2022.

Chinese Space Rocket Junk Fell in Maharashtra ?

Last Saturday night, citizen in certain parts of Madhya Pradesh, Maharashtra and Telangana border witnessed lightshow in the sky, believing it to be a Meteor shower while astronomers believed its may be satellite debris from space.

Experts says that it is most likely to be a Chinese rocket body debris. Indian space agency ISRO's officials said that as per alerts from the U.S.-based USSPACECOM, there were four space debris objects expected to re-enter Earth’s atmosphere on Saturday - 1) The CZ-3B R/B (Chinese rocket body from Long March launch vehicle); 2nd is from SpaceX's Starlink 1831 and the remaining two were small objects from the debris of Kosmos-Iridium satellites collision, a collision accident that happened in 2009.

#Breaking:A #Chinese rocket stage, the third stage of the Chang Zheng 3B serial number Y77 which was launched in Feb 2021 reappears in the atmosphere over #India's #MadhyaPradesh, #Maharashtra, #Gujarat & several states and burns in the sky.@W0lverineupdate pic.twitter.com/1HC8j667Sx

— Siraj Noorani (@sirajnoorani) April 2, 2022

Remaining debris of A #Chinese rocket stage, the third stage of the Chang Zheng 3B serial number Y77 which was launched in Feb 2021 reappears in the atmosphere over #India's #MadhyaPradesh, #Maharashtra, #Gujarat & several states and burns in the sky.
pic.twitter.com/2Q7S0DldoH

— Siraj Noorani (@sirajnoorani) April 2, 2022

According to a Times of India report, a senior ISRO official explained about this incident, saying - The CZ-3B was originally predicted to have a re-entry time of 4.37pm IST and impact location close to Myanmar. However, in its post event prediction, USSPACECOM put the re-entry time as 7.42pm IST with impact location as Arabian Sea. With the latest orbital information from USSPACECOM, the closest match to the observed re-entry over India has to be from Chinese CZ-3B, which was launched on February 4 last year.

Even a minor error in latitude-longitude analysis could mean a difference of tens of kilometers and “given the time (post 7.40pm IST) of spotting of the object and its landing, it is most likely to be the Long March", ISRO official further said.

When rocket bodies survive atmospheric re-entry, the rocket parts such as nozzles, rings and tanks can impact on Earth.

Such incidents deliberately /or accidently happens because Indian space agency relies on America's USSPACECOM to get alerts on space junks/objects entering India's atmosphere. ISRO therefore has recently exoressed concern over this dependency and showing a determination to be self-reliant. ISRO recently announced that it will establish Space Surveillance and Tracking network with RADARS and Optical Telescopes under the project Network for Space Objects Tracking and Analysis (NETRA).

An another Video from Twitter

So last night this happened in our Maharashtra , Meteor shower was witnessed in different parts 🔥😱

Whereas Astronomers r speculating that the celestial event seen was actually the "re-entry of a Chinese rocket stage" that was launched in Feb 2021
#Meteorshower #Maharashtra pic.twitter.com/VzOdMI829Q

— RK (@RKkundrra) April 3, 2022

ISRO Plans Self-Reliance in Monitoring Foreign Space Objects

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While increasing space junk is growing concern for every space agencies across the globe. Space  objects in Low Earth Orbit (LEO) including mega-constellation of satellites deployed by SpaceX's Starlink and China is making a close flyby -- less than a kilometer -- to India-owned Space objects. 

ISRO regularly carries out close approach monitoring for all space objects with Indian Space assets.In last year alone, ISRO monitored 4382 events with close approach distance less than 1 km to Indian LEO space assets and 3148 close approach events less than 5 Km with GEO objects during the year 2021.

The maximum number of threats objects were from fragments of Fengyun 1C (Chinese ASAT test in 2007) and Cosmos – Iridium Collision. While, 84 close approaches less than1 km were observed between Elon Musk promoted SpaceX-operated Starlink satellites and Indian Space Assets. 

Such close encounters of space objects leads to losses and penalties as in order to avoid collision with such space objects, Collision Avoidance Manoeuvre (CAM) needs to be carried out by thrusting the satellite with the fuel stored in the spacecraft that reduces the life of the spacecraft, due to fuel expenditure and disruption of payload operations.

Number of such manoeuvres (CAM) carried out by ISRO, to avoid collision, has increased over the last few years.

CAM is done by ISRO when the Indian space agency gets alerted by America's USPACECOM (United States Space Command), a unified combatant command of the U.S. Department of Defense, responsible for military operations in outer space, specifically all operations 100 kilometers (62 miles) above the Earth's mean sea level.

On 20 October 2021, Chandrayaan-2 Orbiter (CH2O) and NASA's Lunar Reconnaissance Orbiter (LRO) were predicted to come critically close to each other in lunar orbit. NASA and ISRO agreed that the situation merited a collision avoidance manoeuvre which was executed by Chandrayaan-2 on 18th October, 2021, well before the conjunction.

USPACECOM currently tracks using Space surveillance tracking Network and catalogues more than 25,000 space objects including debris and functional spacecraft in Earth’s Orbits. The number of debris that are too small to track are a few millions. 

According to ISRO, USPACECOM issued 543 conjunction alerts regarding the close approaches to the Indian operational assets. The number of alerts is expected to increase significantly in the coming years with the increase in the number of space objects especially due to proliferation of the large satellite constellations.

To analyze and assess such potential threats to India's operational spacecraft and to attain self-reliance in safeguarding the valuable space assets, ISRO will establish Space Surveillance and Tracking network with RADARS and Optical Telescopes under the project Network for Space Objects Tracking and Analysis (NETRA).

Radar and optical telescopes are the main ground based facilities for tracking space objects including space debris. ISRO said, "In order to track closely and frequently the operational spacecraft and the threat objects for estimation of their positions accurately, it is essential to have a network of observational facilities with wide geographical distribution."

The above data are given by ISRO's Space Situational Awareness (SSA) centre, which was launched in December 2020,  in view of ever-growing population of space objects and the ongoing trend towards mega-constellations of satellites.

Source - ISRO

Counting Space Debris - More Than 9800 Tonnes of Space Junk Objects Orbiting Around The Earth

While on Earth, humans are polluting the air, the land and the oceans, the space around the earth too is no different for them since the "Space-Age" has started. Space Pollution -- according to Wikipedia -- is space waste/debris/junk i.e. defunct artificial & man-made objects in space — principally in Earth orbit— which no longer serve a useful function.

Since the start of the space age in 1957, about 6170 (excluding failed missions) rockets have been launched putting about 12,450 satellites into Earth orbit however only 5,000 of these satellites are still functioning, according to the data by European Space Agency (ESA) 's Space Debris Office at ESOC, Darmstadt, Germany.

How Much Space Debris Is There ?

According to the ESA, there are 128 million objects the size of 1 mm to 1 cm, 9,00,000 objects the size of 1 cm to 10 cm, and 34,000 objects greater 10 cm currently whizzing around our planet. Many of these objects are traveling around our planet at roughly 28,163.52 kph, or about 10 times faster than a bullet. 

Total mass of all space objects in Earth orbit is more than 9800 tonnes, reported ESA. The data is latest updated till January 5.

via GIPHY

According to the NASA data, there are approximately 23,000 pieces of debris larger than a softball orbiting the Earth. They travel at speeds up to 17,500 mph, fast enough for a relatively small piece of orbital debris to damage a satellite or a spacecraft. There are half a million pieces of debris the size of a marble or larger (up to 0.4 inches, or 1 centimeter) or larger, and approximately 100 million pieces of debris about .04 inches (or one millimeter) and larger. There is even more smaller micrometer-sized (0.000039 of an inch in diameter) debris.

The NASA Orbital Debris Program Office has gathered pictures and graphics of space debris, as of January 1, 2019. In the below NASA video the dots represent the current location of each orbital debris -

Space debris can be hazardous to active satellites and spacecraft in the Earth's orbit. It has been theorized that Earth orbit could even become impassable to travel along, if the risk of collision grows too high.

A number of space shuttle windows were replaced because of damage caused by tiny flecks of peeling paints. In fact, millimeter-sized orbital debris represents the highest mission-ending risk to most robotic spacecraft operating in low Earth orbit.

In 1996, a French satellite was hit and damaged by debris from a French rocket that had exploded a decade earlier.

Space Junk Record Holders

In a latest this year, astronomers have predicted that an old space junk, which is of Elon Musk promoted company SpaceX's rocket called "Falcon 9" that was launched nearly 7-years ago, will now crash into the moon on March 4, 2022, at a blistering speed of 5,771 mph (9,288 km/h).

China's 2007 anti-satellite test, which used a missile to destroy an old weather satellite, added more than 3,500 pieces of large, trackable debris and many more smaller debris to the debris problem.

On Feb. 10, 2009, a defunct Russian spacecraft collided with and destroyed a functioning U.S. Iridium commercial spacecraft. The collision added more than 2,300 pieces of large, trackable debris and many more smaller debris to the inventory of space junk.

In A First of Earth's Lifetime, A Space Junk May Collide with the Moon at 9,288 Km/Hour Speed

Representational Image (credits - Pixabay)

An old space junk, which is of Elon Musk promoted company SpaceX's rocket that was launched nearly 7-years ago, will now crash into the moon, predicts astronomers.

Launched in February 2015, SpaceX's Falcon 9 rocket ran out of fuel and now the 4.4-ton (4 metric tons) rocket has been moving around fast in the space, in a chaotic orbit. It was supposed to be the part of a mission to send a climate observation satellite 930,000 miles (1.5 million kilometers) from Earth.

On January 5, 2022, Falcon 9 rocket's debris made a close flyby of the moon.

This all was predicted by Bill Gray, a developer of software that tracks near-Earth objects. In a blog post, he stated, "The rocket's upper stage is now expected to hit the far side of the moon while traveling at a blistering speed of 5,771 mph (9,288 km/h) on March 4, 2022."

"There are still several bits of junk we're tracking that may eventually hit the earth or moon or be ejected into orbit around the sun.", Bill says in his blog post.

Further, the data from observers helped scientists pinpoint its orbit of Falcon 9 rocket, discovering it would hit the Hertzsprung crater on the moon’s far side on March 4 at approximately 12:25 UTC. 

The effects of the collision impact will be minimal, aside from a new, albeit small, crater on the moon.

Jonathan McDowell, an astrophysicist at Harvard University, also confirmed that Falcon 9 space debris will hit the Moon. In a tweet, he said, "yes, an old Falcon 9 second stage left in high orbit in 2015 is going to hit the moon on March 4. It's interesting, but not a big deal."

Though, SpaceX may not be held responsible for this collision as it's apparently unintentional. In the past there are few space probes which have been deliberately destroyed at their objects of study, like the moon or other planets, typically by hard landings or crash landings at the end of their respective missions and/or functionality.

For an instance, several rocket stages utilized during the Apollo space program were deliberately crashed on the Moon to aid seismic research, and four of the ascent stages of Apollo Lunar Modules were deliberately crashed onto the Moon after they had fulfilled their primary mission.  

The moon saw intentional crashing of space probes objects, into its surface, for more than 15 times. 

It is to be noted that sometimes, the components of space probes intentionally crashed in order to prevent the hazards of orbital space junk/debris and planetary contamination.

But, Falcon 9 is a first "space junk", wandering in the space with no control from the earth, will crash into the moon. In other words, this is the first known unintentional impact of space junk with the moon.

Besides the moon, the Mercury too has saw intentional crashing when MESSENGER, a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, for studying Mercury's chemical composition, geology, and magnetic field, intentionally crashed into Mercury on April 30, 2015, in order to end the mission.