astronomy

LICIACube

LICIACube is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand LICIACube rather than just read about it. In short: Light Italian CubeSat for Imaging of Asteroids (LICIACube, ) is a six-unit CubeSat of the Italian Space Agency (ASI). LICIACube is a part of the Double Asteroid Redirection Test (DART) mission and carries out observational analysis of the Didymos asteroid binary system after DART's impact on Dimorphos.

Key takeaways

LICIACube belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect LICIACube to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LICIACube from memory before moving on to harder problems.

Reference excerpt

Light Italian CubeSat for Imaging of Asteroids (LICIACube, ) is a six-unit CubeSat of the Italian Space Agency (ASI). LICIACube is a part of the Double Asteroid Redirection Test (DART) mission and carries out observational analysis of the Didymos asteroid binary system after DART's impact on Dimorphos. It communicates directly with Earth, sending back images of the ejecta and plume of DART's impact as well as having done asteroidal study during its flyby of the Didymos system from a distance of 56.7 km (35.2 mi), 165 seconds after DART's impact. LICIACube is the first purely Italian autonomous spacecraft in deep space. Data archiving and processing is managed by the Mission Control Center of Argotec. Its mission ended in the autumn of 2022.

History LICIACube is the first deep space mission developed and autonomously managed by an Italian team. To collaborate upon the design, integration, and testing of the CubeSat, the Italian Space Agency selected the aerospace company Argotec, while the LICIACube GS has a complex architecture based on a mission control center in Turin hosted by Argotec and science operation center in Rome. Antennas of the NASA Deep Space Network (NASA DSN) and data archiving and processing is managed at the ASI SSDC. The scientific team making this cubesat is led by National Institute of Astrophysics INAF (OAR, IAPS, OAA, OAPd, OATs) with the support of IFAC-CNR and Parthenope University of Naples. The team is supported by the University of Bologna for orbit determination and satellite navigation and the Polytechnic University of Milan, for mission analysis and optimisation. The LICIACube team includes the wider Italian scientific community involved in the definition of all the aspects of the mission: trajectory design; mission definition (and real-time orbit determination during operations); impact, plume and imaging simulation, and modelling, in preparation of a suitable framework for the analysis and interpretation of in situ data. Major technological challenges during the mission (autonomous targeting and imaging of such a small body during a fast flyby with the limited resources of a CubeSat) is affordable thanks to cooperation between the mentioned teams in support of the engineering tasks.

Satellite design In order to deal with the mission, the Argotec platform uses an autonomous attitude control system, two light solar arrays, an integrated propulsion system with thrusters of 50mN thrust and isp of 40s, two cameras, an X-band communication system, and an advanced onboard computer.

Scientific payload LICIACube is equipped with two optical cameras for conducting asteroidal reconnaissance during flyby, dubbed LEIA (LICIACube Explorer Imaging for Asteroid), a Catadioptric camera, a narrow field of view (FoV) of 2.06°, 25 microradian/pixel, 2048x2048 pixels, monochrome, achieving a best resolution of 1.38 m/pix at closest approach) camera, and LUKE (LICIACube Unit Key Explorer), a wide 5° FoV imaging camera with an RGB Bayer pattern infrared filter. These captured scientific data revealing the composition of the asteroid and provided data for its autonomous system by finding and tracking the asteroid throughout the encounter. As it was released when DART sped up for its intentional impact, it took an image every 6 seconds during DART's impact period. It had preliminary flyby targets including taking 3 high resolution images revealing the asteroid's morphology concentrating on the physics of the asteroid and plume generations after impact. This may help characterise the consequences of the impact.

Mission profile

Launch LICIACube was manufactured in Italy and sent to Applied Physics Laboratory (APL) of Johns Hopkins University in September 2021. On 8 September 2021, the LICIACube was integrated into the DART spacecraft for launch on 24 November 2021, at 06:21:02 UTC, inside a spring-loaded box placed on the wall of the DART spacecraft.

Goals LICIACube's goals are to:

Document the effect of DART's impact on the secondary member of the 65803 Didymos binary asteroid system Characterise the shape of the target Perform dedicated scientific investigations on it

Cruise phase and flyby

After the launch, the Cubesat remained enclosed within a spring-loaded box and piggybacks with the DART spacecraft for almost the entire duration of DART's mission. It separated on 11 September 2022 from DART by being ejected at roughly 4 km/h (1.1 m/s; 2.5 mph) relative to DART, 15 days before impact. After release, as part of the testing process to calibrate the miniature spacecraft and its cameras, LICIACube captured images of a crescent Earth and the Pleiades star cluster, also known as the Seven Sisters.

It conducted 3 orbital manoeuvrers for its final trajectory, which flew it past Dimorphos about 2 minutes 45 seconds after DART’s impact. That slight delay allowed LICIACube to confirm impact, observe the plume’s evolution, potentially capture images of the newly formed impact crater, and view the opposite hemisphere of Dimorphos that DART never saw, while drifting past the asteroid.

Mission after flyby After the flyby, the spacecraft spent several weeks downlinking image data. Potential targets were selected for an extended mission, including asteroid 14827 Hypnos (1986 JK) on 3 June 2024. Signal with LICIACube was lost on 24 October 2022. Following unsuccessful attempts to reestablish contact, end of mission was declared on 23 December.

Results

Several images have been transmitted to Earth showing rays of impact debris streaming from Dimorphos. On 28 September 2022, the first images of the impact from the LICIACube probe were published on a NASA web page.

Gallery

Illustrations

Worked examples

Example 1 — a first encounter with LICIACube

Start with the simplest possible case. Write down what LICIACube claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to LICIACube before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about LICIACube ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of LICIACube

In research: LICIACube appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses LICIACube in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: LICIACube is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2021 in California, CubeSats, Missions to asteroids, so understanding it makes those chapters shorter.
In everyday life: Look for LICIACube outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study LICIACube in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LICIACube means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain LICIACube out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LICIACube in simple terms?

Why does LICIACube matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study LICIACube?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on LICIACube.