11. It covers 0.25 square degrees , making it also the largest planetary nebula as seen from Earth. 12. It is the second smallest of the modern constellations ( after Crux ), spanning only 72 square degrees . 13. It had a maximum nightly scan area of about 1, 000 square degrees ( covered four times ). 14. The proposed ULTRASAT satellite will observe a field of more than 200 square degrees continuously in the ultraviolet range. 15. It has an area of approximately 0.2 square degrees , the same size as the full Moon. 16. The survey is performed with a 12K?K, 7.8 square degree first light on 13 December 2008. 17. "' Hydra "'is the largest of the 88 modern constellations, measuring 1303 square degrees . 18. The first of these is a cataloging patrol instrument with a mosaic 16 square degree field of view down to 16 magnitude. 19. The GCS ( Galactic ) covers an area of 1400 square degrees in JHK to a depth of K = 18.7. 20. This feed includes 188 individual receivers, to greatly extend the Field of View of an ASKAP 12m dish to 30 square degrees .
