##### sr
Mr Sunthorn SR Rathmanus

### Thai Space Consortium project: Barycentre

A read about Thai Space Consortium project (on https://www.bangkokpost.com/learning/easy/2095791/thailand-on-path-to-space published : 6 Apr 2021 at 08:51), we see that

A pilot satellite named TSC-Pathfinder, the first to be made by Thais, is expected to be launched in 2023 to survey Earth's natural resources.

It is among five small satellites being developed by the Ministry of Higher Education, Science, Research and Innovation (MHESI) in its 2021-2027 space technology programme.

The key areas of research will be space engineering development, application, research and development, and educational and industrial support.

(And a list of vocabulary worth learning)

Anyway, I mused on satellites and solar system and space beyond. I recalled a concept of “barycentre” or orbit centre of heavenly bodies going around a point. ;-) I revised my knowledge and share below.

The barycenter (barycentre; from Ancient Greek βαρύς (barús) 'heavy', and κέντρον (kéntron) 'center') is the (dynamical not physical) center of mass of two or more bodies that orbit one another and is the point about which the bodies orbit. See https://en.wikipedia.org/wiki/Barycenter for how to calculate the barycentre.

In the Solar system, Jupiter is massive, the barycentre of (Jupiter - Sun) is outside of both.  See https://spaceplace.nasa.gov/barycenter/en/ – Sun  Mass1=333,000  Jupiter Mass2=318 (0.000955 M☉) distance between centres of the two a=778,000,000(5.20 AU) r1= 742,000 R1=696,000 r1/R1=1.07 so Barycenter is just outside the surface of the Sun; both the Sun an Jupiter orbit it.

The whole Solar system (Sun and all planets and asteroids) has a barycenter but it is changing its position. (This is a more complex n-body system.)

For Moon and Earth, the Barycentre is about 1710 km (or 3/4 R from Earth centre) beneath your feet.

For The Solar system and the Milky Way:  --Every 230 million years, the sun—and the solar system it carries with it—makes one orbit around the Milky Way's center. Though we can't feel it, the sun traces its orbit at an average velocity of 450,000 miles an hour. [ see Our solar system: The sun information and facts , 15 Sept 2018 –  https://www.nationalgeographic.com ]

Down inside a hydrogen atom (in a classic model of an atom – much debated at present): see
Barycenter and relative coordinates for schroedinger equation of the hydrogen atom https://physics.stackexchange.com

I recommend visiting https://spaceplace.nasa.gov/barycenter/en/ for a plain explanation of the barycentre concept.

Now, can we work out what the barycentre for an industrial system revolving around  TSCP (Thai Space Consortium project)? Taking an example from NASA (a massive organization) and the peripheral (small) industries working around NASA's operations, the barycentre of US space program is deep inside NASA. But for TSCP and its 12 partners, would the barycentre be relatively stable to allow for orderly and useful orbiting?

หมายเลขบันทึก: 702218เขียนเมื่อ 17 เมษายน 2022 06:04 น. ()แก้ไขเมื่อ 17 เมษายน 2022 06:04 น. ()สัญญาอนุญาต: สงวนสิทธิ์ทุกประการ

##### ความเห็น (0)

ไม่มีความเห็น

อนุญาตให้แสดงความเห็นได้เฉพาะสมาชิก
พบปัญหาการใช้งานกรุณาแจ้ง LINE ID @gotoknow
ขอแนะนำ ClassStart
ระบบจัดการการเรียนการสอนผ่านอินเทอร์เน็ต
ทั้งเว็บทั้งแอปใช้งานฟรี