Highlighting the Near and Deep Sky What’s Up E W Highlighting the Near and Deep Sky September 1 - 30, 2018 S
General Information September 2018 Among September’s celestial happenings: Our sister planet dazzles. Seasons go, seasons come. A major planet and some Messiers help us find a minor planet. Sunset Range: 7:49 PM (September 1st) to 7:04 PM (September 30th). End of Astronomical Twilight*: 9:19 PM (September 1st) to 8:31 PM (September 30th). * This is “full darkness” – the sun has reached 18° below the horizon. It’s usually dark enough for observing about a half hour before this.
Moon Phases September 2018 Sun., 2nd – Last Quarter (Fri./Sat. observing opportunities August 31st and September 1st) Sun., 9th – New Moon (Fri./Sat. observing opportunities September 7th/8th) Sun., 16th – First Quarter Mon., 24th – Full Moon Roughly speaking: First Quarter Moon is highest at sunset and sets at midnight Full Moon rises at sunset and is in the sky all night Last (“Third”) Quarter Moon rises at midnight and is highest at dawn New Moon sets at sunset and is absent from the sky all night
Celestial Events September 2018 Sat., 1st – The Equation of Time is 0; solar and civil time in sync. Thurs., 6th – Saturn stationary in right ascension; resumes direct (eastward) motion. Fri., 7th – Moon at perigee; 56.65 Earth-radii from Earth. Sun., 16th – Mars at perihelion, mag. –1.7; 1.38 AU from Sun. Wed., 19th – Moon at apogee; 63.48 Earth-radii from Earth. (11% farther than on the 7th.) Sat., 22nd, 9:54 PM – Autumnal equinox; beginning of fall. Mon., 24th – Venus at mag. – 4.6, brightest for this apparition (mag. – 4.9 is max. brightness). Start looking about 7:15 PM, about 10° high in WSW. Thurs., 27th – Asteroid 4 Vesta 2.8° S of Saturn, mags. 7.4 and 0.6 Image Credit: NASA Dawn Mission Image Credit: Clem Rutter, Rochester, Kent, 2011
(~30 min. before full darkness) (~30 min. before full darkness) September 15th, 9:00 p.m. (~30 min. before full darkness) September 15th, 8:30 p.m. (~30 min. before full darkness) For tonight, Mar. 19th, 8:30 p.m. is about 30 min. before full darkness. For tonight, August 20th, 9:10 p.m. is about 30 min. before full darkness. E W Neptune Venus Jupiter Moon Mars Saturn S
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What’s Up programs are posted on the RVAS Website! Questions ??? What’s Up programs are posted on the RVAS Website!