You observe the planet Saturn at a sextant...

Question 1 / 2066636eea28f7522a1c51b416

Question 1 of 2066636eea28f7522a1c51b416

You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?

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Question 1 of 20

66636eea28f7522a1c51b416

You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?

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🔍 Key Concepts

• Index correction: How to apply a sextant index error that is "off the arc" to get the index correction and corrected sextant altitude • Dip (height of eye) correction: How to convert height of eye in feet to dip and whether it is added or subtracted • Order of corrections when converting hs → Ha → Ho (sextant altitude to apparent altitude to observed altitude)

💭 Think About

• First, decide whether an index error that is "off the arc" makes the index correction positive or negative, and whether that correction is added to or subtracted from hs • Convert the 62‑foot height of eye into a dip correction using the standard sight-reduction tables or formula, then determine if dip is always added or always subtracted • After applying both index correction and dip (and remembering that for a planet, refraction and semidiameter are handled per tables), compare which multiple-choice value is closest to your final Ho

✅ Before You Answer

• Be sure the sign of the index correction is correct for "off the arc" (this is a common exam trap) • Confirm that the dip correction is in minutes of arc and that you used height in feet, not meters • Check that you applied corrections in the right direction: index correction first, then dip, then any other small corrections for a planet before matching to the choices

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Question 1 of 20

You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?

63° 00.6'

63° 01.5'

63° 02.9'

63° 04.1'

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Question 1 / 2066636eea28f7522a1c51b416

Question 1 of 2066636eea28f7522a1c51b416

You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?

Back

Question 1 of 20

66636eea28f7522a1c51b416

You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed