Original file (4,256 × 2,832 pixels, file size: 2.77 MB, MIME type: image/jpeg)

Summary

Description
English: Star trail composite image created by International Space Station Expedition 30 crew member Don Pettit using images ISS030E271722 through ISS030E271757.


Expedition 30 and Expedition 31 Flight Engineer Don Pettit provided information about photographic techniques used to achieve the images: "My star trail images are made by taking a time exposure of about 10 to 15 minutes. However, with modern digital cameras, 30 seconds is about the longest exposure possible, due to electronic detector noise effectively snowing out the image. To achieve the longer exposures I do what many amateur astronomers do. I take multiple 30-second exposures, then 'stack' them using imaging software, thus producing the longer exposure."
Date
Source NASA JSC Flickr account
Author NASA/Don Pettit
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: JSC2012E052684.

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Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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public domain

determination method or standard: work of the federal government of the United States

inception

17 May 2012

catalog code

JSC2012E052684

catalog: Media catalogue of the Johnson Space Center

data size

2,901,211 byte

height

2,832 pixel

width

4,256 pixel

media type

image/jpeg

checksum

cde7e9db8fc9deb39b583fbb85d160665ea170c3

determination method or standard: SHA-1

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Date/TimeThumbnailDimensionsUserComment
current16:29, 8 October 2012Thumbnail for version as of 16:29, 8 October 20124,256 × 2,832 (2.77 MB)SpideogUser created page with UploadWizard

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