ASPACE-Q 

The Astrophysics,  Space  Exploration and Quantum Computing Group   

 ASPACE-Q 

The Astrophysics,  Space  Exploration and Quantum Computing Group   

Have you ever heard of a "minimoon"?

15.11.2024

In August 2024, scientists observed a small "minimoon" named 2024 PT caught briefly in Earth’s gravity. This space rock, about the size of a car, was spotted by the Hawaiian telescope ATLAS and will stay in Earth’s orbit only temporarily. Researchers are curious about its origins, as it could be a piece of an asteroid or even lunar debris. Studying these minimoons helps scientists better understand the nature and origins of such small, passing objects near Earth.


For more details, check put the article here!


Top left panel: a median combination stack of 11 x 75 s g filter images of 2024 PT5. An arrow indicating the width of 10″ is shown for scale, and the cardinal directions are indicated. Top right panel: a median combination stack of 5 x 50 s r filter images of 2024 PT5. Bottom left panel: a median combination stack of 2 x 60 s i filter images of 2024 PT5. Bottom right panel: a median combination stack of 2 x 60 s Z filter images of 2024 PT5. The image scale and cardinal in the r, i, and Z stacks are the same as in the g image stack.
Panel a: The first of four o-band ATLAS-Sutherland telescope discovery images of 2024 PT5 from 2024 August 7 21:11:57 UTC. The asteroid moved at a rate of 34.3 arcminutes per hour (13.7 degrees per day) in the northwest direction. The asteroid makes a  ∼ 9 pixel trail in the 30 s ATLAS exposures, indicated by the red circle. Panel b: the same as panel a but shows the image after subtracting static sources. Despite the presence of nearby stars, the asteroid is detected cleanly in the subtracted images. Panel c: the same as panel a, but the second of four o-band images containing 2024 PT5 taken on 2024 August 7 21:16:35 UTC. Panel d: the same as panel c but shows the image after subtracting static sources. The asteroid was detected with an apparent magnitude of o=17.13 in panel b and o=16.99 in panel c. The large black areas in the subtracted images are regions of saturated pixels from bright stars. The direction of the asteroid and cardinal directions are indicated in each figure.
ide view of the Earth co-rotating frame orbital trajectory of 2024 PT5 as it enters and leaves the Earth-Moon system between 2024 June and 2025 April in Cartesian Earth-Moon barycentric x and z coordinates. The daily position of 2024 PT5 is represented as blue points except the portion of its trajectory when it had  e g < 1 plotted in red. The position of the Earth is plotted with a cyan circle. The circular green-shaded region indicates the Hill sphere of Earth. The position of 2024 PT5 , when it was discovered, is marked by a green circle, and the position of 2024 PT5 when Gemini observed it is marked with a green X. A blue arrow indicates the direction of motion of 2024 PT5 along its orbital path.

Credit: Bolin, B. et al, preprint arxiv The discovery and characterization of minimoon 2024 PT5

Contact us at:

 iss dash sci at spacescience dot ro