1. REVIEW: Time and Diurnal Motion
Review Questions
Updated: Feb 5, 2017

2. Question 1 Which constellation is not circumpolar (at Hayward)?2
Which constellation is not circumpolar (at Hayward)?
(a) Ursa Major
(b) Ursa Minor
(c) Orion
(d) Cepheus
(e) Cassiopea

3. Question 2 The the star Sirius is on the equator (a) never (b) always3
Question 2
The the star Sirius is on the equator
(a) never
(b) always
(c) always from observer on earth’s equator
(d) twice a month
(e) twice a day

4. 4
Question 3
Which constellation can you not see from the north pole but can from Livermore?
(a) Canis Major
(b) Ursa Minor
(c) Ursa Major
(d) Andromeda
(e) Leo
At North Pole, the horizon is the equator. Canis Major is below the equator

5. 5
Question 4
If Aldebaran transits at 9 pm tonight, tomorrow it will transit at
(a) 9:00 pm
(b) 9:04 pm
(c) 8:56 pm
(d) 11 pm
(e) 7 pm

6. 6
Question 5
Castor is at +32, 7:30 hours. It will rise each day where on the horizon?
(a) East
(b) NE (north east)
(c) SE (south east)
(d) North
(e) never (its circumpolar)

7. Question 6 7
Castor is at +32, 7:30 hours. At Hayward (latitude 38), approximately how far above the horizon will it transit?
(a) 90-(32+38)=20
(b) 32 (that’s the meaning of declination)
(c) =58
(d) =84
(e) =70

8. Question 7 Local Sidereal time is, (a) The local sundial time8
Question 7
Local Sidereal time is,
(a) The local sundial time
(b) Same as solar time on fall equinox
(c) the RA which is transiting
(d) Time corrected with the analemma
(e) the hour angle of the sun

9. 9
Question 8
Betelgeuse (RA=6 hours) is transiting at 9 pm on Feb 3 at Hayward. The sidereal time is
(a) 9:00 pm (21 hours)
(b) 6 hours
(c) 14 hours
(d) 5 hours
(e) 9:08 pm (21:08)

10. 10
Question 9
You are lost at sea. The sun is transiting, and your UT clock reads 22:00. What is your longitude?
(a) 10 hours west of Greenwich
(b) 10 hours east of Greenwich
(c) 8 hours west of Greenwich
(d) 8 hours east of Greenwich
(e) 2 hours east of Greenwich

11. 6 pm, 2 hour earlier per month11
Question 10
If the date is May 21, at 8 pm PST
The Universal time is?
The (local) sidereal time is?
The time in Boston is?
The date in Greenwich is?
On June 21, the sky will appear the same at what time?
4 am
12 hours
11 pm
May 22
6 pm, 2 hour earlier per month