#hipparcos — Public Fediverse posts

A bit of #BepiColombo #Titan #asteroids #lunar leads away from #Rosetta #Giotto #lander #Hipparcos but a lot brings it closer.

An international team of astronomers using the #JWST have directly imaged an #exoplanet roughly 12 light-years from Earth.

This planet, Epsilon Indi Ab, is the nearest #Jupiter analog to the Sun, a giant gaseous #planet orbiting the star on a long-period orbit.

I especially like this result because my group discovered the planet in 2018 based on radial velocities and #Hipparcos and #Gaia proper motions.

#astronomy #exoplanets
https://www.esa.int/Science_Exploration/Space_Science/Webb/Webb_images_new_cold_exoplanet_12_light-years_away

An international team of astronomers using the #JWST have directly imaged an #exoplanet roughly 12 light-years from Earth.

This planet, Epsilon Indi Ab, is the nearest #Jupiter analog to the Sun, a giant gaseous #planet orbiting the star on a long-period orbit.

I especially like this result because my group discovered the planet in 2018 based on radial velocities and #Hipparcos and #Gaia proper motions.

#astronomy #exoplanets
https://www.esa.int/Science_Exploration/Space_Science/Webb/Webb_images_new_cold_exoplanet_12_light-years_away

It seems a fragment of the original star catalogue of #Hipparcos may have been discovered. Would be a great discovery, marking a milestone of the beginning of quantitative #Astronomy . Another #Palimpsest for the win!

https://greekreporter.com/2023/08/20/ancient-greek-map-sky-discover-monastery/

It seems a fragment of the original star catalogue of #Hipparcos may have been discovered. Would be a great discovery, marking a milestone of the beginning of quantitative #Astronomy . Another #Palimpsest for the win!

https://greekreporter.com/2023/08/20/ancient-greek-map-sky-discover-monastery/

Two images of a #Jupiter-like #planet that orbits the star AF Leporis imaged with the #SPHERE instrument on #VLT in Chile.

Over the years, astronomers observed accelerating motion in the #star's movement in #Hipparcos and #Gaia observations

#Planets exert a gravitational tug on their host stars, explaining the acceleration, and as astronomers took a closer look at this star with the VLT, they managed to directly image the planet orbiting it.

#astronomy #exoplanets
https://www.eso.org/public/images/potw2308a/

Two images of a #Jupiter-like #planet that orbits the star AF Leporis imaged with the #SPHERE instrument on #VLT in Chile.

Over the years, astronomers observed accelerating motion in the #star's movement in #Hipparcos and #Gaia observations

#Planets exert a gravitational tug on their host stars, explaining the acceleration, and as astronomers took a closer look at this star with the VLT, they managed to directly image the planet orbiting it.

#astronomy #exoplanets
https://www.eso.org/public/images/potw2308a/

Constraints for the orbital #inclination and the true mass of long-period single companions.

This work illustrates how #Gaia and #Hipparcos allow for the orbital properties and masses of long-period RV companions to be further constrained.

The first constraints for nearby long-period #planets from Gaia have started getting published.

#astronomy #exoplanets #radialvelocity #astrometry
https://arxiv.org/abs/2301.01263

Constraints for the orbital #inclination and the true mass of long-period single companions.

This work illustrates how #Gaia and #Hipparcos allow for the orbital properties and masses of long-period RV companions to be further constrained.

The first constraints for nearby long-period #planets from Gaia have started getting published.

#astronomy #exoplanets #radialvelocity #astrometry
https://arxiv.org/abs/2301.01263