Orbital characteristics of hot jupiter planet TOI-6649 b confirmed

Researchers have confirmed the existence and orbital properties of TOI-6649 b, a hot Jupiter orbiting its host star. By using data from the TESS space telescope combined with ground-based radial velocity measurements, the study provides a detailed profile of this gas giant. The findings contribute to a larger set of planetary systems characterized through the SOPHIE and TESS follow-up program.

Star system: TOI-6649 | Distance from the Sun: 659 light years

The exoplanet TOI-6649 b has been confirmed as a transiting hot Jupiter, a large gas planet similar to Jupiter that orbits very close to its parent star. This proximity causes the planet to reach high temperatures. Observations establish its status as part of a group of planetary systems recently analyzed to better understand the diversity of worlds beyond our solar system.

To determine the physical characteristics of the planet, researchers combined several methods. They used photometry from the TESS space telescope to watch for periodic dips in starlight, which occur as the planet passes in front of its star. Additionally, they utilized radial velocity measurements, a technique that detects the slight gravitational wobble of a star caused by the pull of an orbiting planet. High-resolution imaging helped verify that no other nearby stars were interfering with these measurements.

This analysis is part of a wider effort to characterize fourteen different objects of interest. By studying these systems, researchers gain insight into the varied architectures of planetary orbits and the physical nature of giant planets. These data points serve as benchmarks for theories explaining how gas giants form and evolve in different environments.

Key findings
TOI-6649 b is confirmed as a hot Jupiter planet.
The planet orbits its host star every 4.4 to 6.0 days.
The planet has a radius between 1.3 and 1.6 times that of Jupiter.
The mass of the planet is measured between 0.3 and 1.3 times the mass of Jupiter.
The density of the planet is measured between 0.1 and 0.6 grams per cubic centimeter.

Scientific study

SOPHIE and TESS characterization of fourteen TESS Objects of Interest: nine planetary systems and five low-mass stellar companions (external link)