ISRO successfully launched AST SpaceMobile's BlueBird 6 (BlueBird Block-2) aboard the LVM3-M6 rocket on December 24, 2025 at 08:54 hrs IST from Satish Dhawan Space Centre, Sriharikota. At approximately 6,100 kg, it is the heaviest satellite ever launched from Indian soil using an Indian launcher. BlueBird 6 features a phased array antenna spanning nearly 2,400 square feet — the largest commercial communications array ever deployed in low Earth orbit. It is 3.5 times larger than the BlueBirds 1-5 satellites (launched September 2024) and offers 10x the data capacity, supporting peak data rates of up to 120 Mbps. The satellite connects directly to standard smartphones without specialized hardware. AST SpaceMobile aims to orbit 45-60 satellites by end of 2026.
ISRO's LVM3-M6 Launches Heaviest Satellite from Indian Soil — BlueBird Block-2 for AST SpaceMobile
ISRO LVM3-M6 launched 6,100 kg BlueBird 6 — heaviest satellite from Indian soil; 2,400 sq ft antenna for direct smartphone connectivity.
Key facts
- ISRO launched AST SpaceMobile's BlueBird 6 aboard LVM3-M6 on December 24, 2025, from Sriharikota — the heaviest satellite (~6,100 kg) ever launched from Indian soil on an Indian launcher
- BlueBird 6 features a phased array antenna spanning nearly 2,400 sq ft, the largest commercial communications array ever deployed in LEO
- It is 3.5 times larger than BlueBirds 1-5 (launched September 2024) and offers 10x data capacity with peak rates up to 120 Mbps
- The satellite connects directly to standard smartphones without specialised hardware
- AST SpaceMobile aims to orbit 45-60 satellites by end of 2026
PYQPrelims/PYQ angle
- RAS 2021 What is the difference between Polar Satellite launch vehicle and Geosynchronous Satellite launch vehicle? — LVM3 is the heavy-lift successor to GSLV used for the BlueBird 6 mission.
Mains angle
Q: Analyse the strategic significance of ISRO's LVM3-M6 mission launching BlueBird Block-2 for India's commercial space sector. (10 marks)
Answer (50 words):
On December 24, 2025, LVM3-M6 placed AST SpaceMobile's 6,100 kg BlueBird 6 satellite in orbit — the heaviest ever launched from Indian soil. Its 2,400 square foot phased-array antenna enables direct-to-smartphone connectivity at 120 Mbps. The mission showcases ISRO's heavy-lift maturity and India's rising global commercial launch market share.
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ISRO's LVM3-M6 rocket launched the BlueBird Block-2 satellite in December 2025. What was the approximate weight of this satellite?
The BlueBird Block-2 satellite weighed approximately 6,100 kg, making it the heaviest satellite ever launched from Indian soil using an Indian launcher. It was developed by US-based AST SpaceMobile.
Source: SpaceNews
Frequently asked questions
What did ISRO launch on LVM3-M6 from Sriharikota on December 24, 2025?
ISRO launched AST SpaceMobile's BlueBird 6, also called BlueBird Block-2, aboard the LVM3-M6 rocket at 08:54 hrs IST from Satish Dhawan Space Centre, Sriharikota.
Why was the BlueBird 6 launch a record from Indian soil?
At approximately 6,100 kg, BlueBird 6 is the heaviest satellite ever launched from Indian soil using an Indian launcher.
What antenna feature makes BlueBird 6 notable in low Earth orbit?
BlueBird 6 features a phased array antenna spanning nearly 2,400 square feet, described as the largest commercial communications array ever deployed in low Earth orbit.
What connectivity capability and satellite-orbit target did AST SpaceMobile report?
The satellite supports peak data rates of up to 120 Mbps and connects directly to standard smartphones without specialized hardware. AST SpaceMobile aims to orbit 45-60 satellites by the end of 2026.
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