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SDSS Data Release Schedule

Updated October 31, 2008


Data
Release
Baseline
Release Schedule1
 Actual Release Information
Actual
Release Date

Imaging
Footprint
(sq. deg.)

 # of Unique
Objects in
Imaging Catalog
Spectroscopic Footprint
(sq. deg.)
 # of Spectra in Spectroscopic Catalog
EDR
July 2001
5-Jun-2001

462

14 million

386

54,008

DR1
Jan 2003
4-Apr-2003
 2099 53 million 1360 186,250
DR2
Jan 2004
15-Mar-2004
 3324 88 million 2627 367,360
DR3
Oct 2004
27-Sep-2004
 5282 141 million 3732 528,640
DR4
July 2005
29-Jun-2005
 6670 180 million 4783 849,920
DR5
July 2006
28-Jun-2006
 8000 215 million 5740 1,048,960
DR6 July 2007 28-Jun-2007 9583 287 million 7425 1,271,680
DR7 Nov 2008  31-Oct-2008  11266  330 million  9600  1,640,960

Footnotes:

  1. The baseline schedule for EDR through DR5 is defined in: Data Distribution to the Astronomy Community, Revision 1, September 8, 2000.  The baseline schedule for DR6 through DR7 is defined in the SDSS-II Project Execution Plan, dated May 14, 2008.