# Right Ascension and Declination

• Philosophaie
In summary, right ascension and declination are celestial coordinates used to locate objects in the sky. They measure the east-west and north-south positions of an object, similar to longitude and latitude on Earth. Right ascension is measured in hours, minutes, and seconds while declination is measured in degrees. These coordinates allow astronomers to easily locate and track celestial objects, providing a standardized system for identifying an object's position. Unlike azimuth and altitude, which are affected by the observer's location and time of day, right ascension and declination remain constant. They are used in conjunction with other astronomical coordinates to study celestial objects and also in navigation and telescope pointing systems.
Philosophaie
How do you find Right Ascension and Declination from basic Keplerian data?

Can you elaborate on "basic Keplerian data."? What is the data measured in?

Semimajor Axis, Inclination, Eccentricity, Longitude of the Ascending Node, Longitude of Periapsis and Mean Longitude from them find Mean Anomaly, Eccentric Anomaly, True Anomaly and Radius. From all of these I want to find the RA and DEC.

## Question 1: What is right ascension and declination?

Right ascension and declination are celestial coordinates used to locate objects in the sky. Right ascension measures the east-west position of an object, similar to longitude on Earth. Declination measures the north-south position, similar to latitude on Earth.

## Question 2: How are right ascension and declination measured?

Right ascension is measured in hours, minutes, and seconds, with 24 hours representing a full circle. Declination is measured in degrees, with 90 degrees being the north celestial pole and -90 degrees being the south celestial pole.

## Question 3: What is the purpose of using right ascension and declination?

Right ascension and declination allow astronomers to easily locate and track celestial objects in the sky. They provide a standardized system for identifying an object's position, regardless of the observer's location on Earth.

## Question 4: How does right ascension and declination differ from azimuth and altitude?

Azimuth and altitude are coordinates used to locate objects in the sky from a specific observer's position on Earth. They are affected by the observer's location and the time of day, while right ascension and declination remain constant.

## Question 5: How are right ascension and declination used in astronomy?

Right ascension and declination are used in conjunction with other astronomical coordinates, such as magnitude and spectral class, to identify and study celestial objects. They are also used in navigation and telescope pointing systems.

• Astronomy and Astrophysics
Replies
1
Views
647
• Astronomy and Astrophysics
Replies
8
Views
3K
• Astronomy and Astrophysics
Replies
4
Views
1K
• Astronomy and Astrophysics
Replies
2
Views
3K
• Astronomy and Astrophysics
Replies
6
Views
3K
• Astronomy and Astrophysics
Replies
6
Views
2K
• Astronomy and Astrophysics
Replies
2
Views
2K
• Astronomy and Astrophysics
Replies
5
Views
2K
• Astronomy and Astrophysics
Replies
2
Views
2K
• Astronomy and Astrophysics
Replies
4
Views
2K