Photo Info - The Claremont, CA Bowstring Equatorial


DSC00646.jpg
 
DSC00646.jpg
Facing north-northeast.

Note circle of 12 Zodiac signs surrounding base of sundial.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 13:13:04
Exposure Time:10/5000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00645.jpg
 
DSC00645.jpg
Side view, facing almost due west.

Bowstring inclined at ~34-degree angle; equatorial band inclined at ~56 degrees.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 13:12:42
Exposure Time:10/6400 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00647.jpg
 
DSC00647.jpg
Closer view, facing northeast.

Two of the more distinctive features of the Larkin Memorial Sundial are its modern design and analemma-shaped gnomon.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 13:13:15
Exposure Time:10/5000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00633.jpg
 
DSC00633.jpg
Closer side view, facing almost due west.
Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:48:49
Exposure Time:10/8000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00635.jpg
 
DSC00635.jpg
Eight year-old boy shown for vertical scale.

View from the west (facing almost due east). The meridian band runs north-south; the gnomon, representing the Earth's axis of rotation, intersects the semi-circular meridian band at the equivalent of the Earth's North and South Poles. Eight year-old boy is 51.5 inches (130.81 cm) tall.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:51:07
Exposure Time:10/4000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00638.jpg
 
DSC00638.jpg
Boy shown for horizontal scale.

View from the south (facing north), looking along the meridian band. The equatorial band (time scale) runs east-west (right-left). Boy is 51.5 inches (130.81 cm) tall, shown lying along the time scale. The meridian band ('bow') bisects the equatorial band ('time scale'); the 12 o'clock noon hour line is located on the time scale where the two bands intersect (since solar noon occurs when the Sun crosses the observer's meridian). Facing north, morning times are located on the left side of the equatorial band; afternoon times are on the right.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:52:52
Exposure Time:10/6400 sec
F-Number:f/7.1
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:11.80 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00636.jpg
 
DSC00636.jpg
Close-up, Garmin Geko 101 GPS receiver.

Close-up, Garmin Geko 101 GPS receiver showing exact location of sundial (+/- ~20 ft.).

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:52:16
Exposure Time:10/5000 sec
F-Number:f/10.0
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:23.70 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00637.jpg
 
DSC00637.jpg
Close-up, commemorative plaque.

Close-up, Larkin Memorial Sundial commemorative plaque.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:52:26
Exposure Time:10/6400 sec
F-Number:f/7.1
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:11.80 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00639.jpg
 
DSC00639.jpg
Analemma-shaped gnomon shadow.

Analemma-shaped gnomon shadow, plus Garmin Geko 101 GPSr. Note that the dates shown along the sundial analemma (inscribed on the equatorial band) appear backwards compared to a globe analemma. Remember, Sun shadows fall in the opposite direction as the Sun.

Equipment Make:SONY
Camera Model:DSC-P10
Camera Software:QuickTime 6.1
Image Orientation:Top, Left-Hand
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:09:01 08:14:11
Exposure Time:10/20000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00641.jpg
 
DSC00641.jpg
Close-up, gnomon shadow.

Monday, 01 September 2003, ~12:55 PDT.

Equipment Make:SONY
Camera Model:DSC-P10
Camera Software:QuickTime 6.1
Image Orientation:Top, Left-Hand
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:09:01 08:05:21
Exposure Time:10/6400 sec
F-Number:f/10.0
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:23.70 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00644.jpg
 
DSC00644.jpg
Close-up, gnomon shadow.
Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 13:04:31
Exposure Time:10/10000 sec
F-Number:f/10.0
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:23.70 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00643.jpg
 
DSC00643.jpg
Close-up, gnomon shadow.
Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 13:04:17
Exposure Time:10/8000 sec
F-Number:f/10.0
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:23.70 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00634.jpg
 
DSC00634.jpg
Close-up, bowstring-analemma connection.

The hour lines for the bowstring equatorial sundial are laid out on the inner surface of the equatorial band. Every hour is 1/24 of a day, or exactly 15 degrees wide. The shadow of the gnomon (or style), cast among the hour lines on the equatorial band, shows the time.

Equipment Make:SONY
Camera Model:DSC-P10
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:08:02 12:49:47
Exposure Time:10/10000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944

DSC00648.jpg
 
DSC00648.jpg
View from the north (facing south).

View from the north (facing south), looking along the meridian band. The equatorial band (time scale) runs east-west (left-right).

Equipment Make:SONY
Camera Model:DSC-P10
Camera Software:QuickTime 6.1
Image Orientation:Top, Left-Hand
Image Orientation:Top, Left-Hand
Horizontal Resolution:72 dpi
Vertical Resolution:72 dpi
Image Created:2003:09:01 08:05:13
Exposure Time:10/8000 sec
F-Number:f/5.6
Exposure Program:Normal Program
ISO Speed Rating:100
Exposure Bias:0/10
Maximum Lens Aperture:f/2.8
Metering Mode:Pattern
Light Source:Unknown
Flash:No Flash
Focal Length:7.90 mm
Color Space Information:sRGB
Image Width:2592
Image Height:1944