Here's how UAE's Hope probe will enter Martian orbit

Spacecraft has only one shot at being captured by the planet’s gravity

Global Village in Dubai is bathed in red light ahead of the Hope probe's arrival in Martian orbit on Tuesday evening. Pictures by AP / EPA / Dubai Media Office

Emirates Palace is lit up on Friday night

The Dubai Frame in Downtown Dubai

Dubai Canal'a waterfall is illuminated. EPA

A slow exposure with zoom effect picture shows Dubai Canal illuminated. EPA

Residents watch the light show in Business Bay. AP

W Abu Dhabi Yas Island pictured from across the marina

The Museum of the Future in Dubai. EPA

Some of Sharjah's most impressive public landmarks were part of the show

Ajman Museum pictured this weekend

The Gate building at Dubai International Financial Centre

The Burj Al Arab in Dubai

Fujairah fort is pictured at the weekend

Fujairah mall is bathed in red

A stairway in Sharjah turns red ahead of the arrival of the Hope Probe.

Ferrari World Abu Dhabi turns red ahead of the arrival of the Hope Probe.

RAK municipality building

Roads and bridges in Sharjah

National Museum of Ras Al Khaimah

Dubai's Burj Khalifa, the world's tallest skyscraper, showing a countdown to February 9 and the probe's arrival in Mars' orbit. Image: AFP

A view of Bluewaters Island and the Ain Dubai Ferris wheel. Image: AFP

Mission control in Dubai has uploaded its final commands into the Hope probe before the spacecraft tries to enter Mars’ orbit on Tuesday.

The probe will carry out procedures autonomously so it is captured by the Red Planet’s gravity.

Engineers at mission control say they are feeling anxious but confident as the mission’s most complex stage approaches.

With only a 50 per cent success rate, there is no guarantee the orbit entry attempt will succeed.

The National explains the automated sequence Hope will perform on February 9.

Start those thrusters

At 7.30pm Gulf Standard Time, the Mars orbit insertion process will begin. The spacecraft will fire its six Delta V thrusters to slow itself down from 120,000 kilometres per hour to 18,000kph. The deceleration is essential for entering orbit, or it will miss its opportunity.

There is a communication delay of 11 minutes between Hope and mission control, so engineers will not know until 7.42pm whether the burn has begun.

The engines will fire for 27 minutes. When the burn ends, at 7.57pm, the spacecraft will have, hopefully, entered Martian orbit.

But the signal confirming entry should be received at mission control by 8.08pm.

Loss of signal

If mission control do not receive the signal, it means Hope has moved behind Mars and communication has been lost.

That temporary blackout period, known as occultation, could last between 15 and 20 minutes.

Prior to signal loss, and despite the communication delay, mission control could still be monitoring the progress of the burn, giving at least a slight indication of the spacecraft’s health.

But a full evaluation can be made only after communication is restored.

What are the risks?

There are three pairs of thrusters. If one pair fails, the spacecraft is programmed to automatically readjust and keep going.

If any more malfunction, the mission will fail.

The thrusters have been used throughout Hope’s journey to Mars to correct its course but this will be the first time they are used for that long.

Hope was loaded with 800 kilograms of hydrazine fuel, half of which will be used during orbit insertion.

Where is the spacecraft now?

Hope began its journey on July 20, 2020, when it was launched from Tanegashima Space Centre, Japan.

Of the 493.5 million kilometres it is meant to travel, Hope has less than 3.38 million kilometres remaining until it reaches Mars.

It will use gravity to slingshot itself around the planet and be captured in its orbit.

Where can I watch Hope reach Mars?

It will be streamed live on the Emirates Mars Mission website.

'The National' visits Dubai’s mission control - in pictures