October 2016 Star Calendar

Star calendar 1–31 October 2016

1 Oct     The moon sets early, making tonight great for stargazing. Look for Saturn low in the west at dusk, Mars 2 fist-widths to the upper left near Sagittarius and the Summer Triangle directly overhead.

3 Oct     At dusk, Venus is 2 finger-widths below the crescent moon. The pair sets within 2 hours of sunset.

4 Oct     The moon is at apogee, 63.7 Earth-radii (406,000 kilometers) away.

5 Oct     At dusk, Saturn is 2 finger-widths to the moon’s left, and Antares is 3 finger-widths below Saturn.

6 Oct     The moon lies between Saturn, 4 finger-widths to the lower right, and Mars, 2 fist-widths to the lower left. Mars passes within 0.2 degrees of Kaus Borealis, at the top of the Teapot constellation Sagittarius.

7 Oct     At sunset, Mars is 4 finger-widths to the moon’s lower left. Mars is ½ degree to the left of Kaus Borealis.

8 Oct     Mars is 4 finger-widths to the moon’s lower right.

9 Oct     In the early evening, bright Altair is 2½ fist-widths above the moon. Look for the other stars in the Summer Triangle: Vega, 3 fist-widths to the upper right, and Deneb, 3½ fist-widths to the upper left.

11 Oct    If you have a clear view of the eastern horizon, look for Mercury and Jupiter an hour before dawn. Mercury is 0.79 degrees to Jupiter’s left.

16 Oct    The moon is at perigee, 56.11 Earth-radii (358,000 kilometers) away. Perigee occurs 19.4 hours after the full moon, so we can expect tidal extremes.

18 Oct    By midnight, the moon passes within 0.34 degrees of Aldebaran.

19 Oct    Before dawn, Aldebaran is 1 finger-width to the moon’s lower right.

20 Oct    The moon and Betelgeuse rise an hour before midnight.

21 Oct    Before dawn, the moon is between Pollux, 1½ fist-widths to the upper left, and Betelgeuse, 2 fist-widths to the lower right. Procyon is the same distance to the lower left.

24 Oct    Before first light, Regulus is 4 finger-widths to the moon’s lower left.

27 Oct    Low in the southwest at dusk, Saturn, Venus and Antares line up less than 2 finger-widths from each other.

28 Oct    Before dawn, Jupiter is less than 1 finger-width to the moon’s upper right.

31 Oct    The moon is at apogee, 63.8 Earth-radii (407,000 kilometers) away.

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