Saturday 01 February 2025
A team of astronomers has made a significant breakthrough in understanding the shape and size of a small, icy world orbiting Jupiter called Diomedes. The researchers used a technique called stellar occultation to study the object’s dimensions and rotation period.
Diomedes is a member of a group of asteroids known as the Trojans, which are thought to have originated from a region near the asteroid belt. The Trojans are of great interest to scientists because they can provide clues about the early formation and evolution of our solar system.
To study Diomedes, the researchers used a technique called stellar occultation, where they observed the object as it passed in front of a background star. By analyzing the light curve created by the occultation, they were able to determine the object’s size, shape, and rotation period.
The results of the study suggest that Diomedes is a small, irregularly shaped object with a diameter of approximately 72 kilometers. The researchers also found that the object has a slow rotation period of about 24 hours, which means it takes nearly a day to complete one rotation on its axis.
One of the most interesting findings of the study is that Diomedes has a highly eccentric orbit around Jupiter, which means it moves in an elliptical path that brings it closer to and farther from the gas giant. This unusual orbit could provide clues about how the object formed and evolved over time.
The researchers used a combination of observations from different telescopes and instruments to study Diomedes. They analyzed data collected by the Lowell Observatory, the Gaia spacecraft, and the NEOWISE infrared telescope, among others.
One of the challenges in studying Diomedes was its small size and distant location. The object is about 20 times farther away from Jupiter than the planet’s moon Io, making it difficult to observe and study using traditional methods.
To overcome these challenges, the researchers used advanced techniques such as differential aperture photometry and digital coronagraphy. These methods allowed them to create high-quality images of Diomedes and analyze its light curve in detail.
The study of Diomedes is an important step towards understanding the formation and evolution of our solar system. The object’s unusual orbit and shape provide valuable insights into the early history of the solar system, and scientists hope to learn more about this fascinating world in the future.
Cite this article: “Scientists Study Diomedes: A Small, Icy World Orbiting Jupiter”, The Science Archive, 2025.
Jupiter, Diomedes, Trojans, Stellar Occultation, Asteroid Belt, Solar System, Rotation Period, Size, Shape, Eccentric Orbit
