Chandrayaan-2: The Landing That Taught India How to Land

Chandrayaan-2 launched on 22 July 2019 with an orbiter, the Vikram lander and the Pragyan rover. The orbiter reached the Moon and is still working; Vikram descended normally to 2.1 km above the surface before contact was lost and it crash-landed. Four years later, Chandrayaan-3 applied every lesson — and landed.

Launch, landing attempt, and the comeback it led to: 7 moments.

7 milestones from 2019 to 2023: 6 successes, 1 failures, 0 partial successes and 0 other milestones.

July–September 2019 · The journey

Chandrayaan-2 carried 14 payloads: eight on the orbiter, three on Vikram, two on Pragyan and a passive NASA laser reflector. It was ISRO's first attempt to land on another world.

Launch on LVM3-M1

22 Jul 2019 · LVM3 · Success

After a launch attempt on 15 July was called off because of a technical snag, LVM3 lifted off a week later and placed Chandrayaan-2 in a higher Earth orbit than planned — saving propellant that later stretched the orbiter's life.

LVM3 story · In the ISRO timeline

Departs Earth for the Moon

14 Aug 2019 · Success

After five Earth-bound orbit-raising burns, a trans-lunar injection burn sent the spacecraft out of Earth orbit towards the Moon.

Lunar orbit insertion

20 Aug 2019 · Success

Chandrayaan-2 fired its engine near the Moon and was captured into lunar orbit. Four more burns lowered it towards a near-circular orbit about 100 km up.

Vikram separates from the orbiter

2 Sep 2019 · Success

The Vikram lander, carrying Pragyan inside, separated from the orbiter. The two flew in the same orbit for a day before Vikram fired its own engines to drop into a 100 × 30 km orbit ahead of landing.

7 September 2019 · The landing attempt

The final descent from 30 km to the surface was described by ISRO's chairman beforehand as "15 minutes of terror" — an automated sequence no one on the ground could steer in real time.

Vikram lost at 2.1 km

7 Sep 2019 · Failure

In the early hours of 7 September, Vikram began its powered descent. ISRO says performance was normal down to an altitude of about 2.1 km; then communication was lost and the lander made a hard landing.

NASA's Lunar Reconnaissance Orbiter later imaged the impact site and debris, first spotted in its pictures by Chennai engineer Shanmuga Subramanian.

The orbiter keeps working

2019 onwards · Success

The orbiter was unaffected. ISRO says precise launch and orbit management gave it about seven years of life instead of the planned one, and that 90–95% of the mission's objectives were met. Its camera has a resolution of 0.3 m, the sharpest of any lunar orbiter at the time.

2023 · The comeback

Rather than copy Chandrayaan-2, ISRO designed its successor around the question "what if things go wrong?" — and used Chandrayaan-2's orbiter as its relay.

Chandrayaan-3 lands near the south pole

23 Aug 2023 · Success · First landing near the lunar south pole

Chandrayaan-3's lander — also named Vikram — touched down at 18:04 IST, making India the fourth country to soft-land on the Moon and the first near its south pole. Chandrayaan-2's orbiter relayed messages during the mission.

Comeback from Vikram lost at 2.1 km.

What went wrong: The Vikram lander crashed during its final descent.

Why: Engine thrust during braking was higher than expected; errors built up faster than the guidance software could correct, and the landing zone was only about 500 m across.

What fixed it: Chandrayaan-3 got a far bigger landing zone (4 km × 2.4 km), stronger legs, more fuel, extra sensors and software designed to cope with failures instead of a perfect flight.

Track live · Chandrayaan-3 in the ISRO timeline

Key facts for exams

  • Chandrayaan-2 launched 22 July 2019 on LVM3-M1 (then GSLV Mk III-M1).
  • Three modules: orbiter, Vikram lander and Pragyan rover; 14 payloads in total (8 orbiter, 3 lander, 2 rover, 1 passive NASA experiment).
  • Lunar orbit insertion 20 August 2019; Vikram separated 2 September 2019.
  • Vikram's descent was normal to about 2.1 km; it hard-landed on 7 September 2019.
  • The orbiter continues to operate; ISRO expects about 7 years of life and says 90–95% of objectives were met.
  • Chandrayaan-2's orbiter served as a relay for Chandrayaan-3, which landed on 23 August 2023.

Words used on this page

Burn
Firing a rocket or spacecraft engine for a set time to change its speed — and therefore its orbit. Speeding up raises the orbit; slowing down lowers it.
Trans-lunar / trans-Mars injection
The burn that gives a spacecraft enough speed to leave Earth orbit and head for its destination — the Moon, Mars or a Lagrange point.
Orbit insertion
The burn on arrival that slows a spacecraft enough for its destination's gravity to capture it into orbit. Miss it, and the spacecraft flies past.
Orbit raising
A series of burns, usually at perigee, that stretch an orbit further out step by step. ISRO uses it to send spacecraft to the Moon, Mars and L1 on rockets too small to send them there directly.
Payload
Whatever a rocket carries — satellites, a spacecraft, experiments. On a spacecraft, "payloads" are its science instruments.
Propellant (solid and liquid)
What a rocket burns: a fuel plus an oxidiser that supplies the oxygen. Solid propellant is a rubbery block cast inside the motor and can't be switched off; liquid propellant is pumped from tanks and can be throttled or restarted.

Frequently asked questions

What happened to Chandrayaan-2?

The orbiter reached lunar orbit and is still working. The Vikram lander descended normally to about 2.1 km above the surface on 7 September 2019, then lost contact and crash-landed. NASA's Lunar Reconnaissance Orbiter later photographed the impact site.

Is Chandrayaan-2's orbiter still working?

Yes. ISRO says the orbiter has enough propellant for about seven years of operation, against the one year originally planned, and it relayed communications for Chandrayaan-3 in 2023.

Why did Vikram crash?

According to ISRO's explanation of the changes made for Chandrayaan-3, thrust during the braking phase was higher than expected, errors accumulated faster than the guidance software could handle, and the planned landing zone was small. A national expert committee studied the causes and recommended the corrective actions used in Chandrayaan-3.

What is the difference between Chandrayaan-2 and Chandrayaan-3?

Chandrayaan-3 had no orbiter of its own — it used a propulsion module and relied on Chandrayaan-2's orbiter for relay. Its lander had stronger legs, more fuel, more sensors, a much larger landing zone and software designed to tolerate failures.

Related: Chandrayaan-3 Tracker, Chandrayaan-1, LVM3, ISRO Missions Timeline.