OSIRIS-REx mission: Post-TAG UPDATES

After the flawless TAG attempt on Asteroid Bennu by NASA’s 3rd New Frontier’s Program mission OSIRIS-REx, the exact mass of sample collected was supposed to have been measured using the concept of a common Physics Law known as moment of Inertia.

*23 Oct 2020 update: The cameras later captured pictures of spacecraft’s sample collector head brimming so full of regolith that it was slowly falling out of the collector, so the Sample Mass Measurement procedure was cancelled to protect the sample. Scientists are confident that more than 60 grams of sample (which is the minimum target) has been collected by OSIRIS-REx and will proceed to quickly stow the sample.

23 Oct 2020: Sample collector head brimming with regolith

*28 Oct 2020 update: The spacecraft’s sample collector head was successfully placed into its Sample Return Capsule.

28 Oct 2020: Sample collector head placed in return capsule

*29 Oct 2020 update: The Sample Return Capsule is officially closed! The SRC is targeted to touch down in the Utah desert on 24 Sept, 2023.

29 Oct 2020: Sample collector capsule official closed!

I’ll be following OSIRIS-REx mission until 2023. New updates will be posted in a new blog and linked under here.


Disclaimer: I do not own theses photos. These images were screenshots taken from NASA OSIRIS-REx’s instagram page.

Instagram pages to follow!

NASA OSIRIS-REx: https://www.instagram.com/osiris_rex/

Me, Rachel: https://www.instagram.com/racheltan_hx/

Watching from Malaysia: NASA’s OSIRIS-REx Spacecraft First Attempt to Capture a Sample of Asteroid Bennu

“We just want to jump up and shake hands and hug right now!” exclaimed Michelle Thaller, an astrophysicist from NASA Goddard’s Spaceflight Centre. “But with COVID-19, we’ve got to stay apart and protect each other.”

Defining moment in NASA’s history:
OSIRIX-REx Spacecraft touchdown – first attempt to capture a sample of Asteroid Bennu, and bring it back to Earth by 2023

“Touchdown declared.”

Sampling is in progress.”

At 6.11am, Malaysia time, (6.11am EDT time), I jumped up from bed and opened Youtube on my phone – just seconds after OSIRIS-REx’s first sample collection attempt from the surface of Asteroid Bennu 200 miles away from Earth, known as Touch-And-Go on the agenda. 39,000 people were already watching the livestream. NASA’s TAG Team cheered after a successful historic first touchdown attempt to collect the largest asteroid sample since the Apollo era (that would be in the 1960s). The only extraterrestrial sample that could be larger than this would be samples collected from the Moon decades ago.

NASA TV’s simulation of the view of the sampling camera (SamCam) approaching Asteroid Bennu’s rocky terrain
So close! NASA’s OSIRIS-REx preparing for touchdown

The exact mass of sample collected, though, would have to be measured using a special method.

The reason why I’m so excited about this moment is because Asteroid Bennu is an ancient boulder-filled terrain, about only as tall as the Empire State Building, scattered with rocks and dust which may help trace back to the birth and origin of the solar system. Carbon-based compounds were found all over the surface of the asteroid, and these samples may just contain the ingredients for life.

I cheered, watching NASA in the US on the other side of the planet, who were themselves keeping an eye on the data sent back from OSIRIS-REx, 200 miles away from Earth.

Missed most of the action! But after scrolling through the live chats of thousands of people around the world congratulating NASA, and rewinding the live stream, I realized all of the images were only simulations. “We are collecting tons of images right now”, said James Tralie, social medialist and producer at NASA Goddard’s Spaceflight Centre, “but we simply don’t have the data rate to get the images back in real time. So they are getting backed in the spacecraft’s memory and we’ll start looking at those tonight, and we’ll have them available for everybody tomorrow morning.”

I can’t wait to see those images!

On social media: thousands of people around the world supporting NASA’s historic attempt !

This actually isn’t the first asteroid sample to be brought back to Earth. According to National Geographic, Hayabusa, a spacecraft developed by the Japan Aerospace Exploration Agency, returned with the world’s first asteroid sample in 2010, and Hayabusa2 will drop its cargo—a capsule filled with several grams of the asteroid Ryugu on December 6 this year. But these Japanese missions picked up only small amounts of fine-grained material. Asteroid Bennu is designed to pick up up to 2 kilograms of material, although the exact amount of mass collected is yet to be measured (in a day or two’s time).

“We backed away successfully from the asteroid surface – the team is exuberant back there. Emotions are high, everybody is really proud, and.. we have some work to do,” said Dante Lauretta, professor at the University of Arizona and Principal Investigator of the OSIRIS-REx mission. We don’t yet know how much sample we have collected. The next thing that we’re going to be looking for is, once the spacecraft has cooled off – probably got pretty warm as it approached the asteroid surface – once it’s stabilized, it’s going to point toward the Earth and start bringing that data back. Those SamCam images are going to tell us a lot of information about how the events of today went.”

OSIRIS-REx’s Touch-And-Go (TAG) first sample collection attempted completed flawlessly!

According to the National Geographic, who posted just moments after the livestream ended, the mission was first proposed in 2004, but was only competitively selected for the third mission in New Frontiers Program in May 2011. OSIRIS-REx’s original leader, University of Arizona planetary scientist Mike Drake, died only months later due to liver failure. Drake’s deputy, University of Arizona planetary scientist Dante Lauretta, took on the role left by his mentor. The OSIRIS-REx mission has since been carried out in Drake’s memory.

If you’re curious, click here to read about the Ten Extraordinary Things You Didn’t Know About Asteroid Bennu, a curation of all the various information I collected from various sources about this ancient asteroid dating back in time and history, simplified for easy understanding and extra-fun discovery. I will also be including in both this and that blogpost the links to the relevant sites!

James Tralie, producer at NASA Goddard’s Spaceflight Centre holding a mini model of Asteroid Bennu, inches before OSIRIS-REx’s touchdown.
NASA’s OSIRIS-REx Poll on Twitter: How much material do you think I’ll grab from asteroid Bennu today?
21 October 2020, 6.11 am Malaysia Time
Sampling process completed! The TAG Team cheers.

I’ve been so excited for the latest space updates lately, with three new crew members boarding the international space station just last week on October 14, Wednesday, 1.45am EDT time (1.45pm Malaysia time).

Unfortunately, I’m an aspiring doctor, far from being close to such opportunities, haha! If you want to become an astronaut, astrophysicist or be involved in space agencies, an engineering degree would increase your chances to fulfill such dreams.

For now, I am eagerly waiting for the photos to finally be delivered to Earth tomorrow morning, in Malaysia time (or tonight in EDT time), and for OSIRIS-REx to finally return to Earth by the estimated date of 23 September 2023 !

Asteroid Bennu’s a small and spunky one, both posing a threat to Earth while seemingly carrying evidences of dried up rivers or long gone life as well. A great big congratulations and salute to NASA’s TAG team, who worked so hard to overcome the numerous challenges posed by Bennu’s small size, and boulder-filled surface! We probably know Bennu up and down now, seeing the unprecendented amount of calculating, regular correction and up-to-2-centimeters detailed mapping required.


Brief self-intro: I am a Malaysian university student and aspiring doctor, and I post about anything and everything that interests and enriches me and my audience.

Uni semester 2 starts!… but it’s NOT what we imagined it to be.

Hey guys, semester two of university (October trimester) has begun! It is Saturday today, the weekend of week 3 of my second semester. We are welcoming week 4 in. Based on our course plan arranged by our lecturers, the pace will really pick up only by week 4.

So for now there is not much coursework related things to tell you yet, because believe it or not, coursework and assignments are to me what make the semester super interesting. But here’s a breakdown of the 4 courses I am taking this semester.

The courses are arranged in ascending order of my interest, which means the last course is my favourite and the absolute most interesting.

Math:

The topics are very statistical, very dry. Fortunately, we had some basics in these topics such as probability during our high school years (SPM & form 4 / form 5), but it is still supremely dry and most of us dislike this course. However, we are all still in our foundation year and cannot choose courses as we like yet. These are compulsory courses to get into the science degree of our choice (I am from the science stream). It’s full of numbers, and the questions are an entire paragraph of word-dance.

English (Communication Skills):

This course is not so much English as a class on basic communication. It teaches basic public speaking skills, how to overcome apprehension of speaking in front of a large crowd, how to organize the content of your speech, etc.

Much like the English course I took in my first semester, I always find English fun because of the ample research opportunities. My teammates and I researched and presented on the topic of Medical Errors for my first semester, and I learnt so much about the topic I could almost recite an array of medical mishaps to you off the top of my head, and the stories behind each error made, and the impacts those errors had on patients, their immediate relatives, and the medical community. We also greatly improved on our software skills, such as converting files from word or html to pdf, vice versa.

It is one of the most enriching courses I have ever taken. For this semester (2nd sem), our first assignment is an individual presentation unlike the first semester. I have chosen the topic “Covid-19: How has the pandemic benefited us?” to touch on a positive outlook on the advantages reaped from this global crisis. A topic like that I think is interesting, since it provokes thought with its unconventional point of view. I will be presenting on the topic in about two weeks time.

Chemistry (Inorganic Chem):

Inorganic Chemistry’s first chapter – the basics – was slightly difficult to wrap my head around at first. The other chapters follow a very specific pattern: for this whole semester, we are basically learning the Periodic table, its elements, and the properties of those elements. In fact, the chapters are literally named:

  • Group 1 metals.
  • s-block elements.
  • Aluminium.
  • Oxygen, Sulphur and Their Compounds.

“Don’t stress yourself for this semester, ” said my lecturer. “It’s a stress-free topic for Inorganic Chemistry this sem.”

Indeed, but that’s because she’s (probably) comparing it to Organic Chemistry, which we must take in Semester 3, which is way more difficult, will long compound names to memorize.

So, with such a typical pattern to follow, the topics for inorganic chem are not too difficult. This is all except for the first chapter, which was the basics of electronic configurations, and the various components of electron orbitals, which I had some difficulty distinguishing between at first.

But I managed to understand it in the end. So I hope the rest of Inorg Chem will be smooth sailing.

Biology (Modern Biology):

And finally – MODERN BIOLOGY! My absolute favourite! It’s a stark difference compared to the Biology course we took in first semester, which was about Cell Biology. We had had a lot of basics in Cell Biology already since high school. Modern Biology takes DNA, a genetic molecule we only touched upon lightly in high school, and expanding it into a SIX topic long conversation. Mod Bio is basically about Biotechnology and Genetics, the absolute basics in a contemporary topic very closely related to the Covid-19 virus. Knowing that DNA codes for all life on the planet, my interest in this topic is elevated by tenfold. Biology inevitably involves a ton of memorization, though, and sometimes I procrastinate the time away just thinking of the effort required to make my flashcards (I use an online flashcard app to study Biology, but that also means I would need to set aside time to make the cards).

I keep trying to remind myself not to waste all the time away, though. More time would mean I could browse the Internet, checking out even more interesting information on the topic and expanding my knowledge beyond my lecture syllabus. I’ve been watching NASA’s Youtube live streaming of the latest update on a sea altimeter monitoring satellite – Sentinel 6, that would be able to view internal waves and measure them by the centimeter, and plot a World map of the entire ocean that covers our planet. It’s launch is due on But I’m always rather lazy, when I see the pile of work to get done. I always try to remind myself of just what more I can do if I were just to focus and get work out of the way.

But I also don’t want to see studies as a chore to get rid of so that I can do other things. My goal is to make studies a fun thing too, and it’s important, because my studies will be what my career would partly be about. For now, I’m still struggling with that a bit, since my love for certain courses doesn’t quite seem to top my occasional laziness to carry out long-haul efforts.

The next few weeks are going to get busy already, with mini exams, my presentation, lab reports (there’s one due in 3 days time!), and other coursework. That’s all for now! I’ll definitely fill you in with updates halfway through the semester perhaps, to give you a quick glimpse in the midst of the fun chaos of learning, because you blink an eye and I’m gone again until the end of the semester. 😉

Final Assessment: Semester 1 Results!

Guess what – I managed to do well for the first semester! 😀

Those too simple, too brief alphabets you see under “Grades” is all there is to summarize all the hard work I put in for not just my exams, but all my other coursework throughout the semester.

My Final Assessment Grades
My Grade Point Average for the 1st semester of Foundation at university

The coursework I’m referring to includes two formal presentations, which took many nights of toiling and video-chat discussion with my assignment coursemates (which I have promised you I would blog about soon), all the full lab reports, one biological drawing which took a whole day just to draw (I’ll attach a photo of the drawing below!), a research essay and a cited chemistry poster.

Alongside that of course, we had to handle the 1st round of tests, then the 2nd round of tests, then our final assessment. We took 5 courses in our first semester, which adds up to around 15 theory-based test papers, based on the breakdown I did for you.

On top of that, all the exam papers this round has been deliberately made far more challenging, due to the fact that exams are open-book (with information from our lecture notes and the internet at our fingertips) during the Covid-19 crisis.

The biology experimental design video presentation we worked on for days was converted to a total of only 5 effective marks. The biological drawing which took hours of concentration, which I will now attach below, is only 6 effective marks.

NO shading allowed. Dense regions can only be indicated with furious, agitated dotting 😛

My wrist hurt a lot after drawing this. Haha! But it’s still my masterpiece.

As you can see from the 2nd photo I attached at the top of the post, I got a overall Grade Point Average (GPA) of 3.8511. That is well above the requirement to get into a medical degree, which is a CGPA of 3.50. However, if you notice from the first photo, I obtained below average marks for Chemistry, a GPA of 3.33. This is because my better marks in the other courses pulled my overall grade up.

Now, for the 2nd semester (which has just begun!), I am resolved to work hard and smart to obtain a 4 flat (GPA of 4.0). Admittedly, I had my father’s help in the first semester as he guided me using the printed lecture notes. His insight and intelligent input are priceless and highly appreciated, however, I had only half the burden to carry back then, and perhaps the training for stamina was much alleviated. This semester, he has helped me get a head start as well, but only in Mathematics.

The truth will prevail now, if I truly can manage to take on the responsibility myself and be competent enough to study, and learn, intelligently.

This is because to do well in exams these days, diligence is not enough. You need brains, you need to be able to think out of the box, and not take too long to figure out the concepts. It is an undeniable fact that to be a doctor you cannot just be hardworking, you have to be able to think intelligently as well. Dumbness and slowness is not welcomed in the healthcare industry, especially during your medical training. Both of which, unfortunately, I have a bit of in my nature. It is difficult for me to rush things, or else I will not be able to reap information properly.

Now, I must get back to studying for Biology! This semester, our biology course is known as Modern Biology (as opposed to Fundamentals of Cell Biology in our first semester). I find Modern Biology quite exciting, as it dabbles in the absolute basics of molecular genetics and biotechnology, which is particularly relevant to the COVID-19 virus mutation, and a very contemporary topic.

I am struggling to understand it for now, but with my determination I will do my best to overcome it, and make learning it fun.