Photo Info - The Littleton, CO Equatorial Sundial


No. 1 - LITCO_118_1804.jpg
 
LITCO_118_1804.jpg
Upper dial face, facing southwest.

An equatorial sundial is actually a reduced model of the Earth, similar to a globe with its upper and lower halves removed: the dial plate represents the plane of the Earth's Equator; the gnomon represents the Earth's axis of rotation.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:40:27
Exposure Time:1/100 sec
F-Number:f/2.8
Lens Aperture:f/2.8
Exposure Bias:0/3
Maximum Lens Aperture:f/2.5
Metering Mode:Spot
Flash:No Flash
Focal Length:15.81 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:Off
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:118-1804

No. 2 - LITCO_117_1770.jpg
 
LITCO_117_1770.jpg
Upper dial face, facing south.

Upper dial face as viewed from the north (facing south). The upper dial face represents the Northern Hemisphere; the lower dial face represents the Southern Hemisphere.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:01:43
Exposure Time:1/200 sec
F-Number:f/4.0
Lens Aperture:f/4.0
Exposure Bias:0/3
Maximum Lens Aperture:f/2.5
Flash:No Flash
Focal Length:15.81 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Easy Shooting
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Full Auto
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1770

No. 3 - LITCO_117_1789.jpg
 
LITCO_117_1789.jpg
Side view, facing west.

The gnomon is the part of a sundial that casts the shadow used to tell time. For equatorial sundials, the gnomon is a pole (or rod) of varying thickness. The gnomon of a properly oriented equatorial sundial points toward the Celestial North Pole. (The 'Pea Patch Community Garden' appears in the background.)

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:27:36
Exposure Time:1/80 sec
F-Number:f/4.0
Lens Aperture:f/4.0
Exposure Bias:-2/3
Maximum Lens Aperture:f/2.2
Flash:No Flash
Focal Length:11.19 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Program
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:Off
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1789

No. 4 - LITCO_117_1792.jpg
 
LITCO_117_1792.jpg
Close-up side view, facing east.

The gnomon should be parallel to the Earth's axis, inclined at an angle equal to the latitude of the observer. The dial plate should be parallel to the plane of the Earth's Equator (perpendicular to the gnomon), inclined at an angle equal to the complement of the observer's latitude. This angle is also known as the colatitude. The Littleton, CO sundial gnomon angle of inclination = ~39 degrees; dial plate angle of inclination = ~51 degrees.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:30:02
Exposure Time:1/160 sec
F-Number:f/2.8
Lens Aperture:f/2.8
Exposure Bias:-2/3
Maximum Lens Aperture:f/2.8
Flash:No Flash
Focal Length:23.00 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:Off
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1792

No. 5 - LITCO_118_1810.jpg
 
LITCO_118_1810.jpg
Facing southwest.
Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:51:35
Exposure Time:1/6 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:28.81 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:118-1810

No. 6 - LITCO_118_1805.jpg
 
LITCO_118_1805.jpg
Facing south-southeast.

Take time to stop and smell the roses!

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:43:11
Exposure Time:1/8 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:9.09 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:118-1805

No. 7 - LITCO_117_1772.jpg
 
LITCO_117_1772.jpg
Upper dial face.

Gnomon shadow falls on upper dial face from MAR Equinox to SEP Equinox.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:05:30
Exposure Time:1/30 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:7.19 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Cloudy
Image Number:117-1772

No. 8 - LITCO_117_1774.jpg
 
LITCO_117_1774.jpg
~5:10 p.m. Local Apparent Time (L.A.T.).

Saturday, 06 September 2003. ~6:10 p.m. MDT minus ~2 min. EoT = ~6:08 MDT. Note the GPS receiver at the base of the dial plate.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:07:21
Exposure Time:1/100 sec
F-Number:f/7.1
Lens Aperture:f/7.1
Exposure Bias:0/3
Flash:No Flash
Focal Length:7.19 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1774

No. 9 - LITCO_117_1786.jpg
 
LITCO_117_1786.jpg
Close-up, Garmin GPSmap 76S.

Close-up, Garmin GPSmap 76S GPS receiver showing exact location of sundial (+/- ~20 ft.).

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:18:20
Exposure Time:1/25 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:28.81 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1786

No. 10 - LITCO_118_1812.jpg
 
LITCO_118_1812.jpg
Facing north, toward gazebo.
Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:58:21
Exposure Time:1/30 sec
F-Number:f/2.5
Lens Aperture:f/2.5
Exposure Bias:0/3
Flash:No Flash
Focal Length:17.59 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Program
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Single
Flash Mode:Off
Compression Setting:Superfine
Macro Mode:Normal
White Balance:Auto
Image Number:118-1812

No. 11 - LITCO_118_1807.jpg
 
LITCO_118_1807.jpg
Facing north-northwest.

The rose garden is north of the gazebo.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:46:43
Exposure Time:1/4 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:10.19 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:118-1807

No. 12 - LITCO_118_1806.jpg
 
LITCO_118_1806.jpg
Facing north-northeast.

Note the 'War Memorial Rose Garden' sign in the background.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:44:26
Exposure Time:1/6 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:15.81 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:External Flash
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:118-1806

No. 13 - LITCO_117_1780.jpg
 
LITCO_117_1780.jpg
Lower dial face, facing north.

View from the south (facing north).

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:12:19
Exposure Time:1/50 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:8.00 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:Off
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1780

No. 14 - LITCO_117_1783.jpg
 
LITCO_117_1783.jpg
Lower dial face.

Gnomon shadow falls on lower dial face from SEP Equinox to MAR Equinox.

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Firmware Version:Firmware Version 00.00
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:13:19
Exposure Time:1/30 sec
F-Number:f/8.0
Lens Aperture:f/8.0
Exposure Bias:0/3
Flash:No Flash
Focal Length:8.00 mm
Color Space Information:sRGB
Image Width:1704
Image Height:2272
Lens Size:7.19 - 28.81 mm
Exposure Mode:Av-Priority
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Timed
Flash Mode:Off
Compression Setting:Superfine
Self-Timer Length:2 sec
Macro Mode:Normal
White Balance:Auto
Image Number:117-1783

No. 15 - LITCO_118_1802.jpg
 
LITCO_118_1802.jpg
Graph, Equation of Time (APR-SEP).

Graph, Equation of Time (EoT) used to correct solar time for standard time. Transcript of inscription: 'Read right edge of shadow in A.M. Read left edge of shadow in P.M. The add or subtract number of minutes shown on chart below for current date. The result will be standard watch time in Littleton. For Daylight Savings [sic] Time subtract one hour [sic]. Watches in Littleton are set at average time of Sun's passage over the 105d meridian which lies along Datura Ave., just east of here. The dial records solar time which is corrected to Standard Time by this analemma. The dial parallels the Equator and the gnomon parallels the Earth's north-south polar axis. Site of this dial is: longitude 105d0m10s; latitude 39d35m51s. 7 hours west of Greenwich, England.'

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:37:17
Exposure Time:1/60 sec
F-Number:f/4.0
Lens Aperture:f/4.0
Exposure Bias:0/3
Maximum Lens Aperture:f/2.0
Flash:No Flash
Focal Length:7.19 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Program
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Single
Flash Mode:Off
Compression Setting:Superfine
Macro Mode:Normal
White Balance:Auto
Image Number:118-1802

No. 16 - LITCO_118_1801.jpg
 
LITCO_118_1801.jpg
Graph, Equation of Time (OCT-MAR).

Graph, Equation of Time (EoT) used to correct solar time for standard time. Transcript of inscription: 'Read left edge of shadow in A.M. the right edge of shadow in P.M. Then add or subtract number of minutes shown on chart below for current date. The result will be standard watch time in Littleton. For Daylight Savings [sic] Time subtract one hour [sic]. This chart is for fall-winter observation.'

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:36:06
Exposure Time:1/80 sec
F-Number:f/4.0
Lens Aperture:f/4.0
Exposure Bias:0/3
Maximum Lens Aperture:f/2.0
Flash:No Flash
Focal Length:7.19 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Program
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Single
Flash Mode:Off
Compression Setting:Superfine
Macro Mode:Normal
White Balance:Auto
Image Number:118-1801

No. 17 - LITCO_117_1800.jpg
 
LITCO_117_1800.jpg
Commemorative plaque, War Memorial Park.

Commemorative plaque, located in-ground on the eastern side of the sundial. Transcript of inscription: 'Littleton War Memorial Park. Dedicated to the men and women who served in the armed forces during all wars. 1968.'

Equipment Make:Canon
Camera Model:Canon PowerShot G3
Sensing Method:One-Chip Color Area
Firmware Version:Firmware Version 1.02
Owner Name:John B Paverd
Image Orientation:Top, Left-Hand
Horizontal Resolution:180 dpi
Vertical Resolution:180 dpi
Image Created:2003:09:06 18:34:29
Exposure Time:1/60 sec
F-Number:f/4.0
Lens Aperture:f/4.0
Exposure Bias:0/3
Maximum Lens Aperture:f/2.2
Flash:No Flash
Focal Length:10.19 mm
Color Space Information:sRGB
Image Width:2272
Image Height:1704
Lens Size:7.19 - 28.81 mm
Exposure Mode:Program
Focus Type:Auto
Metering Mode:Evaluative
Sharpness:Normal
Saturation:Normal
Contrast:Normal
Shooting Mode:Manual
Image Size:Large
Focus Mode:Single
Drive Mode:Single
Flash Mode:Off
Compression Setting:Superfine
Macro Mode:Normal
White Balance:Auto
Image Number:117-1800