5G 
AIR. F. C. PENROSE ON THE ORIENTATION OF CERTAIN 
Name of temple. 
Orientation 
angle. 
Stellar 
elements. 
Solar 
elements. 
Name of 
star. 
Temple of 
269° 56' 
A 
Amplitude of star 
+ 0° 89' TT. 
+ 0° 4'E. 
Spica, 
Hercules 
or sun 
setting 
B 
Corresponding alti- 
3° 
0° 30' 
tude 
C 
Declination . 
+ 2 ° .30' 
+ 0 ° 22 ' 
D 
Hour angles . 
5'^ 53“ 
6 ii 52“ 
E 
Depression of sun 
* • 
10 ° 
when star heliacal 
F 
R. A. 
nil lOm 
Oh 3m 
Ct 
Approximate date . 
470 B.C., 
Alarch 20 
The temple of Concord, of which the orientation angle is 270° 4', would have the same star 
and the date about 18 years later. 
Name of temple. 
Orientation 
angle. 
Stellar 
elements. 
Solar Name of 
elements. star. 
The 
257° 35' 
A 
Amplitude of star 
+ 10° 44' E. 
+ 12° 25' E. a Arietis, 
Olympieium, 
or sun 
rising^ 
sometimes called 
B 
Corresponding alti- 
3° 30' 
+ 0 ° 30' 
Temple of 
tude 
Giants 
C 
Declination 
+ 10° 39' 
+10° 9' 
D 
Hour angles . 
0 h 15 m 
71 , 51m 
E 
Depression of sun 
• » 
15° 
when star heliacal 
F 
R. A. 
23'' 59“ 
111 gqm 
G 
Approximate date . 
430 B.C., 
April 14 
See a subsequent remark on the deep solar depi’essions of temples of late date. 
Name of temple. 
Orientation 
angle. 
Stellar 
elements. 
Solar 
elements. 
Name of 
star. 
Temple of Castor 
266° 0 ' 
A 
Amplitude of star 
+ 0° 14' W. 
+ 4° E. 
Spica, 
or sun 
setting 
Corresponding alti- 
3° 
+ 0° 30' 
1 
i 
tude 
0 
Declination . 
+ 2 ° 0 ' 
+ 3“ 29’ 
I 
D 
Hour angles . 
5I1 5Jm 
7I' IS'" 
i 
E 
Depression of sun 
13° 9' 
when star heliacal 
1 
F 
R. A. 
11'' 23“ 
01 ' 32"' 
i 
G 
Approximate date . 
400 B.C., 
Sept. 13 
In this case, with a solar depression of 10°, the coi’respondence with the heliacal star would not j 
take place till about 400 years later. 
