This page is frequently revised, so the reader is strongly encouraged to consult the online version of the Explanatory Supplement for updates. Figure 1 is an Aitoff projection of the sky in J2000 equatorial coordinates showing the 2MASS Tiles observed as of 2000 September 5. A 2MASS survey tile is a 6° long by 8.5´ wide strip that runs roughly north-south. The sky has been divided into 59,650 such tiles. A total of 58,954 tiles have been observed, or approximately 98.8% of the total survey area.
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| Figure 1 |
Approximately 1% of the observed tiles will be rescanned because of poor weather or sky conditions. These tiles are shown in yellow in figure above.
[Last updated 2000 Sep 5 by R. Cutri. Modified 2000 Sep 12 by S. Van Dyk.]