ATP-3-09-02 Field Artillery Survey Download
Page 109 of 168
Survey Methods 16 February 2016 ATP 3-09.02 7-21 Figure 7-20. Virgo 7-52. One of the most easily recognized constellations is Scorpio (see figure 7-21). However, it is so far south that in northern latitudes it is visible during evening hours only through July and August. Antares ( Scorpii) is another of the four royal stars. Figure 7-21. Scorpio 7-53. The Northern Cross, Cygnus, is found very close to the circumpolar region (see figure 7-22 on page 7-22). This is a very prominent constellation, and in northern latitudes in the fall, it will be nearly overhead in the evening. The head of the cross is Deneb ( Cygni). There are two neighbor stars in this sector of the sky--Vega ( Lyrae), which rises just before the cross, and Altair ( Acquilae), which trails it somewhat to the south. Cygnus is imagined by some to be a cross; to others, it takes the shape of a swan from which the name is derived.