How Is the Angular Diameter of Jupiter Measured and What Equipment Is Used?

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    Angular Diameter
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SUMMARY

The angular diameter of Jupiter is measured using telescopes, with magnification levels being irrelevant to the calculation of the angular diameter itself. Instead, the measurement focuses on the angle formed between two lines extending from the observer to the edges of Jupiter. Space probes provide more precise measurements of Jupiter's diameter and shape. This discussion clarifies that the actual equipment used for these measurements includes telescopes and space probes, emphasizing the importance of understanding angular measurements in astronomy.

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  • Understanding of angular diameter concepts
  • Familiarity with telescope operation and magnification
  • Basic knowledge of astronomical measurements
  • Awareness of space probe technology and its applications
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  • Research the mathematics behind angular diameter calculations
  • Learn about different types of telescopes and their specifications
  • Explore the capabilities of space probes in measuring celestial bodies
  • Investigate the methods used to calculate angular measurements in astronomy
USEFUL FOR

Astronomy enthusiasts, astrophysicists, and students studying celestial measurements will benefit from this discussion, particularly those interested in the techniques used to measure planetary diameters.

aldool
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I read a post here on PF about angular diameter, https://www.physicsforums.com/showthread.php?t=91704
I *THINK* I understand the math, my question is the actual measurement of Jupiter. Is it done at zero magnification (how?!) or 100x or ??x
And with what piece of equipment?
 
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Actual measurements can be done with telescopes, but the magnification does not matter, you just have to take it into account in the calculation.
Space probes there can measure the diameter (and shape) more accurately.
 
What I believe that mfb is trying to say is that angular diameter, unless otherwise stated, is taken to be the angle formed between two lines whose meeting point is at the observer and whose ends fall on opposite sides of the object being measured.
 

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