September Celestial Calendar

September Celestial Calendar

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  • #5826
    Dave Mitsky
    Participant

    September 2020 Celestial Calendar by Dave Mitsky

    All times, unless otherwise noted, are UT (subtract four hours and, when appropriate, one calendar day for EDT)

    9/1   The equation of time, which yields the difference between mean solar time and apparent solar time, equals 0 at 2:00

    9/2   Full Moon (known as the Barley, Corn, or Fruit Moon) occurs at 5:22; asteroid 2 Pallas is stationary at 13:00

    9/3   The Moon is 3.9 degrees southeast of Neptune at 1:00

    9/4   The Martian winter solstice occurs at 4:00

    9/6   The Moon is 0.03 degrees north of Mars, with an occultation occurring in southern Europe, northern Africa, Cape Verde Island, and central and northeastern South America, at 5:00; the Moon is at apogee, subtending 29′ 28″ from a distance of 405,607 kilometers (252,032 miles), at 6:29

    9/7   The Moon is 3.0 degrees south of Uranus at 4:00

    9/8   Mercury is at the descending node through the ecliptic plane at 18:00

    9/9   The Moon is 6.2 degrees southeast of the bright open cluster M45 (the Pleiades or Subaru) in the constellation of Taurus at 0:00; the Moon is 4.1 degrees north of the first-magnitude star Aldebaran (Alpha Tauri) at 18:00; Mars is stationary at 18:00

    9/10 Last Quarter Moon occurs at 9:26; the Moon is at the ascending node (longitude 85.2 degrees) at 23:00

    9/11 The Curtiss Cross, an X-shaped illumination effect located between the craters Parry and Gambart, is predicted to be visible at 00:32; asteroid 19 Fortuna (magnitude +9.4) is at opposition in the constellation of Pisces at 7:00; the Moon is 0.3 degrees south of the bright open cluster M35 in the constellation of Gemini at 13:00; Neptune (magnitude +7.8, angular size 2.3″) is at opposition at 20:00

    9/13 Jupiter is stationary, with prograde (direct or eastward) motion to resume at 0:00; the Moon is 7.9 degrees south of the first-magnitude star Castor (Alpha Geminorum) at 0:00; the Moon is 4.3 degrees south of the first-magnitude star Pollux (Beta Geminorum) at 5:00; Venus is 2.3 degrees south of the bright open cluster M44 (the Beehive Cluster or Praesepe) in the constellation of Cancer at 10:00

    9/14 The Moon is 2.1 degrees north-northeast of M44 at 5:00; the Moon, Venus, and M44 lie within a circle with a diameter of 4.4 degrees at 6:00; a double Galilean satellite shadow transit (Callisto’s shadow follows Io’s) begins at 6:57; the Moon is 4.4 degrees north-northeast of Venus at 7:00; Jupiter is at its southernmost declination at 20:00

    9/15 The Moon is 4.1 degrees north-northeast of the first-magnitude star Regulus (Alpha Leonis) at 19:00

    9/16 The Sun enters the constellation of Virgo, at longitude 174.2 degrees on the ecliptic, at 14:00

    9/17 New Moon (lunation 1209) occurs at 11:00

    9/18 The Moon is at perigee, subtending 33′ 17″ from a distance of 359,082 kilometers (223,123 miles), at 13:48

    9/19 The Moon is 5.9 degrees north-northeast of Mercury at 3:00; Mercury is at aphelion (0.4667 astronomical units from the Sun) at 3:00; the Moon 6.4 degrees north-northeast of the first-magnitude star Spica (Alpha Virginis) at 10:00

    9/22 Mercury is 0.3 degrees northeast of Spica at 12:00; the Sun’s longitude is 180 degrees at 13:31; the northern hemisphere autumnal equinox occurs at 13:31; the Moon is 5.8 degrees north-northeast of the first-magnitude star Antares (Alpha Scorpii) at 14:00

    9/23 The Moon is at the descending node (longitude 263.9 degrees) at 13:00

    9/24 First Quarter Moon occurs at 1:55; the Lunar X, also known as the Werner or Purbach Cross, an X-shaped clair-obscur illumination effect involving various ridges and crater rims located between the craters La Caille, Blanchinus, and Purbach, is predicted to be fully formed at 13:09

    9/25 The Moon is 1.6 degrees south of Jupiter at 7:00; the Moon is 2.3 degrees south of Saturn at 22:00

    9/26 Venus at ascending node through the ecliptic plane at 22:00

    9/29 Saturn is stationary, with prograde (direct or eastward) motion to resume, at 3:00

    9/30 Asteroid 68 Leto (magnitude +9.6) is at opposition in the constellation of Cetus at 3:00; the Moon is 3.9 degrees southeast of Neptune at 6:00

     

    #5827
    Dave Mitsky
    Participant

    I’m only going to post the initial portion of the calendar since I can’t post the whole thing anymore for some reason.

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