Aditya L1 successfully undergoes the second earth-bound manoeuvre: ISRO
Bengaluru (PTI): Aditya L1, the first space based Indian mission to study the Sun underwent the second earth-bound manoeuvre successfully, during the early hours on Tuesday, ISRO said.
ISRO's Telemetry, Tracking and Command Network (ISTRAC) carried out the operation.
"The second Earth-bound manoeuvre (EBN#2) is performed successfully from ISTRAC, Bengaluru. ISTRAC/ISRO's ground stations at Mauritius, Bengaluru and Port Blair tracked the satellite during this operation. The new orbit attained is 282 km x 40225 km," ISRO said in a post on X (formerly Twitter).
The next manoeuvre (EBN#3) is scheduled for September 10, 2023, around 02:30 Hrs. IST, it said.
Aditya-L1 is the first Indian space based observatory to study the Sun from a halo orbit around first sun-earth Lagrangian point (L1), which is located roughly 1.5 million km from earth.
The first earth-bound manoeuvre was successfully performed on September 3.
The spacecraft will undergo two more earth-bound orbital manoeuvres before placing in the transfer orbit towards the Lagrange point L1. Aditya-L1 is expected to arrive at the intended orbit at the L1 point after about 127 days.
ISRO's Polar Satellite Launch Vehicle (PSLV-C57) on September 2 had successfully launched the Aditya-L1 spacecraft, from the Second Launch Pad of Satish Dhawan Space Centre (SDSC), Sriharikota.
After a flight duration of 63 minutes and 20 seconds, Aditya-L1 spacecraft was successfully injected into an elliptical orbit of 235x19500 km around the earth.
According to ISRO, a satellite placed in the halo orbit around the L1 point has the major advantage of continuously viewing the Sun without any occultation /eclipses. This will provide a greater advantage of observing the solar activities and its effect on space weather in real time.
Aditya-L1 carries seven scientific payloads indigenously developed by ISRO and national research laboratories including Indian Institute of Astrophysics (IIA), Bengaluru, and Inter University Centre for Astronomy and Astrophysics (IUCAA), Pune.
The payloads are to observe the photosphere, chromosphere and the outermost layers of the Sun (the corona) using electromagnetic and particle and magnetic field detectors.
Using the special vantage point L1, four payloads directly view the Sun and the remaining three payloads carry out in-situ studies of particles and fields at the Lagrange point L1, thus providing important scientific studies of the propagatory effect of solar dynamics in the interplanetary medium.
The suits of Aditya L1 payloads are expected to provide the most crucial information to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, propagation of particles and fields.
According to scientists, there are five Lagrangian points (or parking areas) between the Earth and the Sun where a small object tends to stay if put there. The Lagrange Points are named after Italian-French mathematician Joseph-Louis Lagrange for his prize-winning paper -- "Essai sur le Problème des Trois Corps, 1772." These points in space can be used by spacecraft to remain there with reduced fuel consumption.
At a Lagrange point, the gravitational pull of the two large bodies (the Sun and the Earth) equals the necessary centripetal force required for a small object to move with them.
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KKR enter their 4th IPL final with thumping win over SRH
Ahmedabad, May 21: Kolkata Knight Riders entered their fourth IPL final with a thumping eight-wicket win over Sunrisers Hyderabad in Qualifier 1 here on Tuesday.
Mitchell Starc stuck thrice in the powerplay as KKR bowled out Sunrisers Hyderabad for 159.
Rahul Tripathi top-scored for SRH with 55 off 35 balls while Heinrich Klaasen smashed 32 off 21 balls. The 62-run stand between Tripathi and Klaasen was the lone positive in an otherwise underwhelming batting effort.
KKR then gunned down the target in 13.4 overs, thanks to Venkatesh Iyer (51 not out) and skipper Shreyas Iyer's (58 not out) unbeaten knocks.
SRH will get one more opportunity to make the final when they face the winner of the Eliminator in Chennai on Friday.
Brief scores:
SRH 159 all out in 19.3 overs (Rahul Tripathi 55; Mitchel Starc 3/34).
KKR 164 for 2 in 13.4 overs (Venkatesh Iyer 51 not out, Shreyas Iyer 58 out out; T Natarajan 1/22).
