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USPS Star Calendar for 12-18 April 5 April 2015

Posted by amedalen in April 2015.
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12 Apr    Follow the pointer stars at the end of the Big Dipper’s handle to the left past Polaris, the North Star, to Cassiopeia, the Lazy “W” constellation near the horizon in the north.

13 Apr    Orion, the Mighty Hunter, is low in the west at sunset. Two fist-widths to the right of his belt is Aldabaran. Venus is 1 fist-width to the lower right of Aldabaran. Use your binoculars to spot the Pleiades, the Seven Sisters, 1 finger-width to the right of Venus.

15 Apr    The equation of time is zero. Local mean time and sun time are equal.

17 Apr    The moon is at perigee, 565.60 Earth-radii (361,000 kilometers) away.

USPS Star Calendar for 1-7 September 25 August 2013

Posted by amedalen in September 2013.
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1 Sep    In the east before dawn, the waning crescent moon stands between the Gemini Twins, 1 fist-width to the upper left, and Procyon, the same distance to the lower right. Brilliant magnitude –2.0 Jupiter is 1 fist-width directly above the moon. Less than 20 percent of the moon’s surface is illuminated. The equation of time is zero.

2 Sep    Mars is 3 finger-widths to the slivered moon’s upper left before dawn.

3 Sep    Only two days from new, the moon, about 5 percent illuminated, rises less than two hours before the sun.

5 Sep    Low in the west at dusk, the first light you see is magnitude –4.0 Venus, followed by magnitude 0.7 Saturn, 1 fist-width to the upper left, and magnitude 1.2 Spica, less than 1 finger-width to Venus’ lower left. New moon at 1136 UT

7 Sep    Only a few days old, the moon sets soon after the sun, making stargazing easier. Ursa Major, the Big Dipper, sits a little left of north with its handle pointing to the upper left. The pointer stars at the end of the bucket point toward Polaris, less than 3 fist-widths to the upper right. Looking to the right (east), you can easily make out Cassiopeia, the Lazy W constellation. Turning farther right, now facing south, you can see the Summer Triangle to Cassiopeia’s upper right. Sagittarius and Scorpius are easy to spot near the horizon. Finishing the turn, now facing west, you can see Arcturus, the bright star in the middle of the sky.

USPS Star Calendar for 7-13 July 30 June 2013

Posted by amedalen in July 2013.
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7 Jul    The moon is at apogee, 63.73 Earth-radii (253,000 miles) away.

8 Jul    New moon at 0714 UT

9 Jul    Mercury passes between Earth and the sun at inferior conjunction and will soon be visible in the morning sky.

11 Jul    Look low in the west at dusk to see magnitude 1.3 Regulus 3 finger-widths to the waxing crescent moon’s upper right and magnitude –3.9 Venus 1½ fist widths to the right. The moon is less than 10 percent illuminated.

13 Jul    In the early evening, the Big Dipper stands high in the north with its handle pointing upward. Follow the pointer stars at the bucket end 3 fist-widths to the North Star, magnitude 2.1 Polaris. Continue along that line to Cassiopeia, the Lazy W constellation.

USPS Star Calendar for 17-13 April 31 March 2013

Posted by amedalen in April 2013.
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7 Apr    Find the North Star, Polaris, by using the pointer stars at the far end of the Big Dipper’s bucket. Follow a line 3 fist-widths away from the opening to magnitude 2.1 Polaris. Now look beyond Polaris to the Lazy W constellation Cassiopeia, 2½ fist-widths to the lower left.

8 Apr    The thin waning crescent moon rises a little more than an hour before the sun. Mercury rises about 20 minutes later, giving you time to catch a glimpse before it’s lost in the sun’s glow. Mercury is 3 finger-widths to the moon’s lower right. Only 5 percent of the moon’s surface is illuminated.

10 Apr    New moon at 0935 Universal Time

12 Apr    The thin waxing crescent moon sets 2½ hours after the sun. About 5 percent of the moon’s surface is illuminated.

13 Apr    Low in the west at evening twilight, the thin waxing crescent moon lies between the Pleiades Cluster, 4 finger-widths to the lower right, and magnitude 1.1 Aldebaran, 3 finger-widths to the upper left. Jupiter is less than 1 fist width to the upper left.

USPS Star Calendar for 3-9 March 24 February 2013

Posted by amedalen in March 2013.
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4 Mar    The last-quarter moon is above Antares before dawn.

5 Mar    The moon is at perigee, 58.01 earth-radii or 370,000 kilometers away.

6 Mar    The waning crescent moon rises 4 hours before the sun and is low in the south at dawn. Sagittarius is to the moon’s lower right. About a third of the moon’s surface is illuminated.

7 Mar    With the moon setting 4 hours before the sun, the dark sky will be perfect for stargazing. Start in the north with the Big Dipper, Ursa Major, the Great Bear. The handle arcs down toward the horizon. Follow the pointer stars at the far end of the dipper 3 fist-widths left to Polaris, the North Star. Another 3 fist-widths beyond Polaris is the Lazy W constellation, Cassiopeia, upside down in the early evening.

8 Mar    Now that you’ve found Polaris, use binoculars to see if you can make out the Little Dipper, Ursa Minor, the Little Bear. Polaris represents the end of the handle or the bear’s tail. This evening the handle extends to the lower right, arcing slightly upward, with the bowl parallel to the horizon. You need a dark sky to see the entire dipper, as only two stars are second magnitude and one is third magnitude. The others are fourth and fifth magnitude.

USPS Star Calendar for 14-20 October 7 October 2012

Posted by amedalen in October 2012.
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14 Oct    Following a line from the Big Dipper’s pointer stars through and beyond Polaris brings us to Cassiopeia, the Lazy W constellation. In Greek mythology, she was the wife of King Cepheus and mother of Andromeda. In Roman myth, Cassiopeia was chained to her throne as punishment for her boastfulness. To Arab astronomers, Cassiopeia’s stars formed the main part of the Camel constellation.

17 Oct    The moon is at perigee, 56.55 Earth-radii (361,000 kilometers) away.

18 Oct    Low in the west at dusk, magnitude 1.2 Mars is 3 finger-widths to the thin, waxing crescent moon’s lower right. Less than 2 finger-widths to Mars’ lower left sits its red rival, magnitude 1.1 Antares. Using binoculars, compare their colors. Don’t dally, because they sink below the horizon within two hours of sunset.

19 Oct    Low in the southwest at dusk, the waxing crescent moon is just above the dome of the Teapot constellation, Sagittarius. Arab astronomers saw these stars as ostriches on their way to drink from the Milky Way. The moon’s surface is 20 percent illuminated.

20 Oct    Having moved to the left, the moon is above the handle of the Teapot. The star 3 finger-widths to the moon’s lower left is magnitude 2.1 Nunki.

USPS Star Calendar for 12-18 August 5 August 2012

Posted by amedalen in August 2012.
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12 Aug    In the east before dawn, the moon is between magnitude -2.2 Jupiter, 4 finger-widths to the upper right, and magnitude -4.3 Venus, 1½ fist-widths to the lower left. Orion is to the lower right, and the bright star 2½ fist-widths to the upper left is magnitude 0.2 Capella. The dimmer star between them is magnitude 1.8 Elnath.

13 Aug    Low in the east before dawn, the moon is less than 2 finger-widths to Venus’ upper right. Only 20 percent of the moon’s surface is illuminated. Look southwest at dusk to see Saturn, Mars and Spica line up within 2 finger-widths of one another. Magnitude 0.2 Saturn is on the top, magnitude 1.1 Mars is in the middle, and magnitude 1.2 Spica is on the bottom.

14 Aug    Although Saturn, Mars and Spica are still in line tonight, Mars has moved to the left and will continue to do so, leaving Saturn and Spica behind.

15 Aug    Along the eastern horizon an hour before sunrise, magnitude 0.2 Mercury is 4 fist-widths to the lower left of the thin waning crescent moon. Look quickly because the ever-elusive Mercury fades from view as the sky brightens.

16 Aug    Mercury reaches its greatest elongation west, 18.7 degrees from the sun. Mercury rises 1½ hours before the sun and is visible before sunrise with a clear view of the eastern horizon. Rising a half hour after Mercury, the thin waning crescent is 3 finger-widths below.

17 Aug    Tonight’s new moon is perfect for stargazing. With binoculars, find Mars, Saturn and Spica near the western horizon at dusk. Moving left (south) to see Scorpius and Sagittarius also hugging the horizon. Continue moving left until you are looking north to the Big Dipper. Follow the dipper’s pointer stars to Cassiopeia, the Lazy W constellation.

18 Aug    Now that you have found Cassiopeia, look 3 fist-widths to the upper right to magnitude 1.3 Deneb, 2 fist-widths above Deneb to magnitude 0.1 Vega, and 3½ fist-widths to Vega’s lower right to magnitude 0.9 Altair. These three stars form the Summer Triangle.