A planet revolves round a massive star in a highly elliptical orbit. Is its angular momentum constant over the entire orbit ?

A planet revolves around a massive star in a highly elliptical orbit. Is its angular momentum conserved over the entire orbit?

A heavenly body revolves around a massive star in a highly elliptical orbit..Is its angular momentum constant over the entire orbit?

The earth revolves round the sun in an elliptical orbit. Its speed

The earth revolves round the sun in an elliptical orbit. Its speed

A planet of mass M is revolving round the sun in an elliptical orbit. If its angular momentum is J then the area swept per second by the line joining planet to sun will be :-

A satellite is revolving round the earth in an elliptical orbit :

A satellite is revolving round the earth in an elliptical orbit. Its speed will be