http://www.universetoday.com/120061/tales-tails-of-two-comets-prospects-for-q1-panstarrs-g2-master/#more-120061
May 16: Passes into the constellation Aries.
May 16: The waning crescent Moon passes 2 degrees distant.
May 17: Crosses northward through the ecliptic.
May 20: May break +10th magnitude.
June 11: Passes in to the constellation Taurus.
June 12: Passes 2 degrees from M45 (The Pleiades).
June 15: May break 6th magnitude.
June 20: Passes into Perseus.
June 21: Passes into Auriga.
June 23: Passes +2.7 magnitude star Hassaleh (Iota Aurigae).
June 25: Passes the +7.5 magnitude open cluster IC 410.
June 26: Passes +6 magnitude Pinwheel Open Cluster (M36).
July 2: Crosses into Gemini.
July 3: Passes the +3.6 magnitude star Theta Geminorum.
July 5: Passes 10 degrees north of the Sun and into the evening sky.
July 6: Passes midway between Castor and Pollux.
July 6: Reaches perihelion at 0.315 astronomical units (AU) from the Sun.
July 7: May top out at +3rd magnitude.
July 8: Crosses into Cancer.
July 12: Photo Op: passes M44, the Beehive Cluster.
July 13: Sits 30 degrees from Comet C/2015 G2 MASTER (see below).
July 15: May drop below +6th magnitude.
July 15: Crosses the ecliptic southward.
July 17: The waxing crescent Moon passes 1.5 degrees south.
July 19: Crosses into Leo.
July 20: Closest to Earth, at 1.18 AU distant.
July 21: Less than 10 degrees from Jupiter and Venus.
July 22: Crosses into Sextans.
July 26: Crosses the celestial equator southward.
August 4: Crosses into Hydra.
August 5: Crosses into Crater.
August 18: Crosses back into Hydra.
August 30: Crosses into Centaurus.
September 1: Drops below +10th magnitude.
觀星論壇 
