---
title: "Isro's EOS-05 settles into geosynchronous orbit"
url: https://projectchintan.com/article/isro-eos-05-geosynchronous-orbit-yelol
publisher: Project Chintan
author: Project Chintan Newsroom
section: Science & Technology
published: 2026-09-08T07:30:42.473Z
modified: 2026-09-08T09:30:05.715Z
language: en-IN
---

# Isro's EOS-05 settles into geosynchronous orbit

ISRO’s EOS-05 satellite has reached a geosynchronous orbit after a final orbit-raising burn, enabling near-continuous observation over the subcontinent from around 34,903–35,884 km altitude. The mission also serves weather forecasting and naval imaging needs, with health checks ongoing before imagin

## Key takeaways

- EOS-05 completed its final orbit-raising burn and settled into a geosynchronous orbit with a 34,903 km perigee and 35,884 km apogee.
- The final burn lasted 1,247 seconds, and ISRO reported the satellite health as normal.
- The mission enables near-continuous observation over the subcontinent and supports weather forecasting and naval imaging requirements.

## What Happened

The Indian Space Research Organisation (ISRO) announced that its Earth Observation Satellite, EOS-05, has settled into a geosynchronous orbit following a series of orbit-raising maneuvers after its launch on September 4. The final orbit-raising burn was completed at 8:57 pm on September 7, 2026, with the LAM engine firing for 1,247 seconds. The post-manoeuvre orbit is 34,903 km in perigee and 35,884 km in apogee. ISRO described the satellite health as normal and indicated that the vehicle would undergo health and systems checks in the coming days before imaging systems are activated and first Earth observation images are transmitted from its near-stationary position along the equator.

EOS-05 was launched by ISRO’s GSLV F17 rocket, noted as the heaviest mission for the GSLV class, into a sub-geostationary transfer orbit with a 171 km perigee and a 31,000 km apogee. Over September 5 and 6, successive orbit-raising maneuvers adjusted its orbit to a more circular GEOSYNC profile, with a perigee of 20,000 km and apogee of 35,786 km before settling into the final geosynchronous configuration.

ISRO officials indicated that EOS-05 will primarily support near-continuous observation of the Indian subcontinent and will also provide imaging capabilities that can support weather forecasting and naval imaging requirements for strategic purposes.

## Why It Matters

The satellite’s geosynchronous positioning enables prolonged observation over a broad swath of the region, which can enhance weather monitoring and security-relevant imaging for India. The mission marks ISRO’s first Earth observation satellite placed in a geosynchronous orbit, expanding the agency’s orbital options beyond traditional circular geostationary configurations.

## Background

EOS-05 was developed to meet weather observation needs while also servicing the imaging requirements of the Indian Navy. The launch used ISRO’s GSLV F17 rocket and followed a sequence of orbit-raising maneuvers designed to achieve a geosynchronous orbit rather than a geostationary one.

## Key Facts

- EOS-05 is in a geosynchronous orbit with a perigee of 34,903 km and an apogee of 35,884 km.

- The final orbit-raising burn occurred at 8:57 pm on September 7, 2026, lasting 1,247 seconds.

- The satellite was launched into a sub-geostationary transfer orbit with a perigee of 171 km and apogee of 31,000 km.

- Preliminary orbit-raising moves on September 5 and 6 adjusted the orbit to a 20,000 km perigee and 35,786 km apogee before final settling.

- ISRO described the satellite health as normal and noted that imaging systems would be activated after checks.

- EOS-05 is intended for weather forecasting and strategic naval imaging capabilities.

- EOS-05 is ISRO’s first Earth observation satellite to be placed in geosynchronous orbit.

## What Happens Next

Health and systems checks are expected to continue in the upcoming days, followed by activation of imaging systems and initial Earth observation data transmission from the satellite’s geosynchronous perch along the equator.

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Canonical: https://projectchintan.com/article/isro-eos-05-geosynchronous-orbit-yelol
Reported from: Multiple Sources