Author Topic: ISRO - Chandrayaan-3: lunar exploration mission  (Read 113799 times)

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #20 on: 07/18/2023 09:54 am »
https://twitter.com/isro/status/1681236337024974850

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Chandrayaan-3 Mission:
The mission is on schedule.

The third orbit-raising maneuver (Earth-bound perigee firing) is performed successfully from ISTRAC/ISRO, Bengaluru.

The next firing is planned for July 20, 2023, between 2 and 3 pm IST.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #21 on: 07/18/2023 01:37 pm »
https://twitter.com/virtualtelescop/status/1680949832867872774

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We observed the #Chandrayaan3 spacecraft again last night! Furthermore, we created a time-lapse using our 15 July data. 🛰️🔭📷 @isro
More here ⬇️⬇️⬇️
🛑https://www.virtualtelescope.eu/2023/07/17/the-chandrayaan-3-a-image-and-time-lapse-15-17-july-2023/

Offline abcd_indya

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #22 on: 07/19/2023 05:45 am »
https://twitter.com/isro/status/1681236337024974850

Quote
Chandrayaan-3 Mission:
The mission is on schedule.

The third orbit-raising maneuver (Earth-bound perigee firing) is performed successfully from ISTRAC/ISRO, Bengaluru.

The next firing is planned for July 20, 2023, between 2 and 3 pm IST.

Any idea on what the new orbit is? The announcement doesn't call it out anywhere.

Offline Hungry4info3

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #23 on: 07/19/2023 02:18 pm »
51400 km x 228 km according to a different tweet on the ISRO twitter.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #24 on: 07/20/2023 10:13 am »
https://twitter.com/isro/status/1681960236347965440

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Chandrayaan-3 Mission:
🇮🇳 India celebrates #InternationalMoonDay 2023 by propelling Chandrayaan-3 🛰️ a step closer to the Moon 🌖

The fourth orbit-raising maneuver (Earth-bound perigee firing) is performed successfully from ISTRAC/ISRO, Bengaluru.

The next firing is planned for July 25, 2023, between 2 and 3 pm IST.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #25 on: 07/20/2023 03:15 pm »
https://twitter.com/isro/status/1682029955746770944

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Chandrayaan-3 has attained an orbit of 71351 km x 233 km orbit, as intended.

Offline Targeteer

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Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline otter

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #27 on: 07/25/2023 09:24 am »
https://twitter.com/isro/status/1683767962560512000

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The orbit-raising maneuver (Earth-bound perigee firing) is performed successfully from ISTRAC/ISRO, Bengaluru.

The spacecraft is expected to attain an orbit of 127609 km x 236 km. The achieved orbit will be confirmed after the observations.

The next firing, the TransLunar Injection (TLI), is planned for August 1, 2023, between 12 midnight and 1 am IST.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #28 on: 07/26/2023 03:04 pm »
https://twitter.com/isro/status/1684215386814685184

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The achieved orbit is
127603 km x 236 km.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #29 on: 07/29/2023 04:23 pm »
https://twitter.com/planet4589/status/1685321129328517120

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The Chandrayaan-3 lunar probe is now in a 247 x 127067 km x 21.3 deg orbit, preparing for its translunar insertion burn on Jul 31

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #30 on: 07/31/2023 05:12 am »
https://twitter.com/chethan_dash/status/1685879402884628480

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#Update #Space #Thread

With all things having gone as planned so far, @isro will attempt to slingshot — through #TLI — between 12am and 1am Aug 1. This means only six days left for #Chandrayaan3 to reach the lunar orbit. Scroll down for more on TLI. 1/n

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The midnight TLI manoeuvre is expected to last between 28 and 31 minutes and onboard thrusters will be fired when #Chandrayaan-3 is at perigee. 2/n

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At present the Chandrayaan-3 spacecraft is going around Earth in an elliptical orbit at a velocity ranging between 1km/second and 10.3km/second. 3/n

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The velocity is highest (10.3km/s) at perigee & lowest at apogee & while attempting the slingshot, it'll need to have a high velocity. The other reason is that its angle will have to change to travel towards Moon, which can be added if the operation is carried out at perigee. 4/n

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The pre-written and pre-loaded commands for TLI, as was the case with Chandrayaan-2, will be enabled around five-six hours ahead before the thrusters are expected to fire, to kickstart a sequence of events. 5/n

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The firing of the thrusters, aside from helping the spacecraft change its orientation to begin the journey towards Moon, will also add to its velocity. Post TLI, Chandrayaan-3’s velocity is expected to be higher by around 0.5km/second from what it was at perigee. 6/n

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On avg, it takes about 51 hours to travel 1.2-lakh-km. While avg distance between Earth and #Moon is 3.8-lakh-km, the actual distance on any given day would vary based on the position of Earth & Moon. The range could be between 3.6-lakh-km and 4-lakh-km. 7/n

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Reaching Moon's orbit is only one part of the mission — Isro had already put a satellite around Moon in 2008 (#Chandrayaan1) and 2019 (#Chandrayaan2) — and the more crucial part of #Chandrayaan3 would be after the spacecraft reaches Moon. 8/n

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Once #Chandrayaan3 captures a lunar orbit, Isro will have to carry out a series of manoeuvres to reduce its altitude & put it in a 100km circular orbit where the propulsion module will be separated from the landing module (Vikram and Pragyan), scheduled for Aug 17. 9/n

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Isro will attempt landing on August 23. If Isro manages to successfully land Vikram on Moon, India will enter an elite club of nations to have done this before, the US, erstwhile USSR and China. n/n

Offline spacexplorer

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #31 on: 07/31/2023 11:21 am »
 
Quote
between 12am and 1am Aug 1

I guess this means:

2023/07/31 12:00 PM - 2023/08/01 01:00 AM  IST

or

2023/08/01 00:00 AM - 2023/08/01 01:00 AM IST

or, better

2023/08/01 18:30 - 2023/08/01 19:30 GMT

Offline s^3

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #32 on: 07/31/2023 01:24 pm »
As per NASA Horizons, Planned tentative TLI burn moment

July 31 18:43:00 UT
Aug 1 00:13:00 IST

Offline otter

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #33 on: 07/31/2023 07:05 pm »
https://twitter.com/isro/status/1686089881875775488

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Chandrayaan-3 completes its orbits around the Earth and heads towards the Moon.

A successful perigee-firing performed at ISTRAC, ISRO has injected the spacecraft into the translunar orbit.

Next stop: the Moon 🌖

As it arrives at the moon, the Lunar-Orbit Insertion (LOI) is planned for Aug 5, 2023.

Offline vyoma

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #34 on: 07/31/2023 09:15 pm »
 Chandrayaan-3 Trans-lunar Injection live stream (tracking):


Offline otter

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #35 on: 08/01/2023 11:20 am »
https://twitter.com/isro/status/1686327939280035840

Quote
Chandrayaan-3 Mission:

The spacecraft’s health is normal.

Today’s perigee burn has successfully raised Chandrayaan-3 orbit to 288 km x 369328 km.

In this orbit, the spacecraft enters the moon’s sphere of influence.

A crucial maneuvre at perilune would achieve the Lunar Orbit Injection (LOI).

Offline abcd_indya

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #36 on: 08/02/2023 02:03 am »
Any updates on Chandrayaan2 and what's going as Chandrayaan3 will need to use it as a relay as it orbits around the moon and attempts landing. Also it is kind of interesting to not hear about any pictures from the onboard cameras on Chandrayaan3. Am sure all of us would love to see a selfie with earth or moon in the background

Offline whitelancer64

Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #37 on: 08/02/2023 02:48 pm »
When is the lunar orbit insertion burn?

*edit* I may have answered my own question. Per Jonathan McDowell it will enter the Moon's gravitational influence on August 4. A reply says per JPL's Horizons data the LOI burn is August 6.

https://twitter.com/_starbase_/status/1686398454124158977
« Last Edit: 08/02/2023 02:54 pm by whitelancer64 »
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Offline s^3

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #38 on: 08/03/2023 09:02 am »
^^^
Deduced from NASA/Horizons database:

It will be in Moon Gravity from about 01:00 UT/Aug 05
1st Perilune ( immidiate after Lunar capture ) at 14:00 UT.

Offline FutureSpaceTourist

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Re: ISRO - Chandrayaan-3: lunar exploration mission
« Reply #39 on: 08/04/2023 10:49 am »
https://twitter.com/isro/status/1687384615215124480

Quote
Chandrayaan-3 Mission: 
The spacecraft has covered about two-thirds of the distance to the moon.

Lunar Orbit Injection (LOI) set for Aug 5, 2023, around 19:00 Hrs. IST.

 

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