Emersion of Spica, Alp Vir, SAO 157923 (Multiple star system), 1.0mag, Position Angle=275.8°, Azimuth az=254.9°, Altitude h=26.0°, RA=13h26.5m Dec=-11°17.3′, Moon phase=30.4%, Sun altitude hsun=-30.2° (bright limb); (Northern limit: 114°56’E 49°22’N (18h42m11s, dlat/dlon=-72.0’/°, dt/dlon=+3.3min/°), alt=22.7°, dark limb; Southern limit: 114°56’E 6°09’S (20h15m40s, dlat/dlon=-9.2’/°, dt/dlon=+1.3min/°), alt=33.8°, dark limb)