Astronomy Principles and Practice Fourth Edition.pdf

Answers to problems 463
Figure A8.4. ⊙ T is the Sun’s position when it transits; on June 21st this position at transit is Z in this latitude.
Estimated LST is 6 h when Sun transits. Estimated altitude of X is 40 ◦ . Estimated azimuth of X is 20 ◦ EofNat
apparent noon. The star X is not circumpolar.
Chapter 9
1. 66 ◦ 34 ′ north or south
2. 66 ◦ 34 ′
3. 23 h 52 m ; 367 1 4
4. 4 h 46 m 21 s ;14 h 04 m 40 s ;17 h 15 m 46 s ;20 h 14 m 29 s
5. 6 h 47 m 27·s8
6. 23 h 09 m 58·s7
7. 22 h 46 m 20 s
8. 56 ◦ N
9. 2 h 04 m
10. 17 h 17 m 7 s
11. 20 h 47 m 32 s (Note: The approximate Greenwich Date removes the ambiguity about the
chronometer dial being a 12 h or 24 h one)
12. 21 h 07 m 51 s
13. 2 h 45 m 49 s ;7 h 14 m 00 s
14. 4 h 42 m 08 s
15. June 21st: December 21st. (Sun’s right ascension is 90 ◦ and 270 ◦ , respectively, on these dates)
16. 3 h 57 m .(Hint: FindRA⊙; find HA Venus at sunset, then at Venus set; convert interval of sidereal
time to mean solar time)
17. 93 d 15·h66
18. 93 d 14·h4
19. Use equations (8.2), (8.12) and table 8.1 or 8.2