Given the question: Information: - HD 122430 is an orange giant star about 440 light years away in the constellation of Hydra on the celestial sphere. The star has completely run out of the hydrogen fuel that keeps it stable, although its age is only 3.1 billion years old, younger than the Suns 4.6 billion years. HD 122430 has a mass of 1.4 times and radius of 22.9 times that of the Sun. Despite its younger age, it has slightly lower metallicity, approximately 90%. The temperature of its surface (photosphere) is approximately 4300 kelvins. - Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, after Mercury. Named after the Roman god of war, it is often referred to as the "Red Planet" because the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth. - An impact crater is an approximately circular depression in the surface of a planet, moon, or other solid body in the Solar System or elsewhere, formed by the hypervelocity impact of a smaller body. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Although Meteor Crater is perhaps the best-known example of a small impact crater on Earth, impact craters range from small, simple, bowl-shaped depressions to large, complex, multi-ringed impact basins. - HD 122430 b is a giant planet orbiting around the giant star HD 122430 . It has a mass at least 3.71 times that of Jupiter . This planet located at a distance of 1.02 astronomical units away from its star , which is very similar to the Earth 's distance from the Sun. Despite of this , the higher luminosity of the star implies it is heated much more strongly than the Earth is . Its orbit is highly eccentric , around 68 % . At periastron , the orbital distance from its parent star is 0.33 AU . At apastron , the distance is 1.71 AU . If this planet were in the Solar System , its orbit would range from just within Mercury 's orbit to just beyond Mars 's orbit . In Spain , Setiawan discovered this planet in 2003 , using the radial velocity method . After reading the paragraphs above, we are interested in knowing the entity with which 'hd 122430 b' exhibits the relationship of 'constellation'. Find the answer from the choices below. Choices: - crater - hydra
The answer is:
hydra