DASCH: Digital Access to a Sky Century @ Harvard
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Plate Information for ai19905

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Observatory NameCambridge
W. Longitude (deg)71.1292
Latitude (deg)42.38
Aperture (m)0.038
Scale (arcsec/mm)1360
TelescopePatrol cameras
Plate ClassL
Photograph(s) of the Plate JacketView the flood-damaged plate jacket (0.6 MiB).
Photograph(s) of Plate and AnnotationsView the plate photo (17.6 MiB).
View at reduced resolution


Plate Exposure Information
Exposure Number0
Exposure Time (minutes) 58.00
Right Ascension22:03:53.275
Declination+03:34:39.60
Geocentric Date1920-09-08T06:16:28.6
JD: 2422575.76144
Heliocentric Date1920-09-08T06:24:23.6
HJD: 2422575.76694
Plate Center SourceimWCS
Date SourceLogbook
Exposure Notes
Time Accuracy (days)0.0007


Raw Logbook Data - Logbook page may not be digitized. Try the logbook browser.
Exposure Number0
Exposure Time (minutes)
Right Ascension22 00
declination0
DateSep 07 1920
Exposure Start Time00 11
Exposure Stop Time01 09
Exposure Hour Angle2 11 W
Logbook Remark761
Logbook Notes
Error Type


No plate condition records present in the stacks database.


Plate Events Table
DateVersion IDPicked StatusStack LocationEvent NotesValid
2016-01-181Floodyes
2019-02-13T16-52-071Plate JPEGyes
2019-02-15T10:11:341Hand Cleanedyes
2019-02-15T11-52-171Scannedyes


Scan Data
Binned Plate Thumbnaildownload via StarGlassdownload via StarGlass
Full Mosaicdownload via StarGlassdownload via StarGlass
Scan Number00
Mosaic Number01
Scan Date2019-02-15T11-52-172019-02-15T11-52-17
Average Tile ADU21652165
Average Tile Saturation (pixels)00
Maximum Tile Saturation (pixels)00
Scan Comment
Mosaic CommentRowNoiseFix
Mosaic Binning01,1601,16
WCS Fit SolutionAvailableAvailable
Mosaic Rotation00