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Astronaut Photography of Earth - Display Record

STS61C-46-10

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	File Name	File Size (bytes)	Width	Height	Annotated	Cropped	Purpose	Comments
View	STS61C-46-10.JPG	37625	640	480	No	No	ISD 1
View	STS61C-46-10.JPG	95105	639	639	No	No	Earth From Space collection

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Request	STS61C-46-10.JPG	7661813	5265	5265	No	No	Earth From Space collection
Request	STS61C-46-10.JPG	10239996	5290	5600			ReefBase pilot

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Electronic Image Data

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Identification

Mission: STS61C Roll: 46 Frame: 10 Mission ID on the Film or image: 61-C
Country or Geographic Name: CHINA
Features: PRATAS ISLAND
Center Point Latitude: 20.5 Center Point Longitude: 117.0 (Negative numbers indicate south for latitude and west for longitude)
Stereo: Yes (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: 17
Camera Focal Length: 250mm
Camera: HB: Hasselblad
Film: 5017 : Kodak, natural color positive, Ektachrome, X Professional, ASA 64, standard base.

Quality

Film Exposure: Normal
Percentage of Cloud Cover: 20 (11-25)

Nadir

Date: 19860113 (YYYYMMDD)GMT Time: 014908 (HHMMSS)
Nadir Point Latitude: 20.1, Longitude: 116.2 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: Northeast
Sun Azimuth: 135 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 181 nautical miles (335 km)
Sun Elevation Angle: 33 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 10

Captions

STS61C-46-0010 Pratas (Dongsha) Island, South China Sea January 1986
Pratas Island, its lagoon, and its horseshoe-shaped coral reef are the centerpiece in this southeast-looking, low-oblique photograph. Named Dongsha Island (East Sand Island) by the Chinese, Pratas is approximately 200 miles (322 kilometers) southeast of Hong Kong in the northern South China Sea. The island and its reef are the remains of coral skeletons on a submerged sea terrace now 984 feet (300 meters) below the sea surface. The island is a sanctuary for many tropical birds. The phosphorous-rich lime soils of the island mix with the abundant bird guano deposits to make excellent fertilizer that is transported by the Chinese to the mainland for agricultural use.

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