Sky and Telescope - March 2016 - 50

OBSERVING

Celestial Calendar

Daily Jupiter Events
Jupiter's four big Galilean moons are
visible in any telescope. Binoculars
almost always show at least two or three.
Identify them by the diagram on the
previous page.
All the March interactions between
Jupiter and its satellites and their shadows are tabulated on the facing page.
Eleven double shadow transits occur in
March. Three happen when Jupiter is in
good view from much of North America.
These are on the night of March 14-15
from 10:22 p.m. to 12:34 a.m. Eastern
Daylight Time; the night of March 21-22
from 12:23 to 2:31 a.m. EDT; and the

morning of March 29th from 3:00 to 4:25
a.m. EDT. Subtract three hours from
these times to get Pacific Daylight Time.
And here are all the times, in Universal Time, when Jupiter's Great Red Spot
should cross the planet's central meridian.
The dates, also in UT, are in bold. (Eastern
Standard Time is UT minus 5 hours; Eastern Daylight time is UT - 4 hours.)
February 1, 4:28, 14:24; 2, 0:19, 10:15, 20:11;
3, 6:06, 16:02; 4, 1:57, 11:53, 21:48; 5, 7:44, 17:40;
6, 3:35, 13:31, 23:26; 7, 9:22, 19:18; 8, 5:13, 15:09;
9, 1:04, 11:00, 20:56; 10, 6:51, 16:47; 11, 2:42,
12:38, 22:33; 12, 8:29, 18:25; 13, 4:20, 14:16; 14,
0:11, 10:07, 20:02; 15, 5:58, 15:54; 16, 1:49, 11:45,

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On March 9th, a total eclipse of the Sun will cross parts of Sumatra, Borneo, Sulawesi,
and the Pacific; the totally eclipsed Sun will rise in the Indian Ocean and set north of
Hawai'i. The eclipse will be partial for a much wider area, including Southeast Asia, China,
Japan, and parts of Australia. At any location, interpolate between the red lines to find the
Universal Time of greatest eclipse. Interpolate between the blue lines to see what percent
of the Sun's diameter the Moon will cover at that time. For more maps and further details,
see http://is.gd/eclipse03092016.

50

March 2016 sky & telescope

21:40; 17, 7:36, 17:32; 18, 3:27, 13:23, 23:18; 19,
9:14, 19:09; 20, 5:05, 15:01; 21, 0:56, 10:52, 20:47;
22, 6:43, 16:38; 23, 2:34, 12:30, 22:25; 24, 8:21,
18:16; 25, 4:12, 14:08; 26, 0:03, 9:59, 19:54; 27,
5:50, 15:45; 28, 1:41, 11:37, 21:32; 29, 7:28, 17:23.
March 1, 3:19, 13:14, 23:10; 2, 9:06, 19:01; 3,
4:57, 14:52; 4, 0:48, 10:44, 20:39; 5, 6:35, 16:30; 6,
2:26, 12:21, 22:17; 7, 8:13, 18:08; 8, 4:04, 13:59,
23:55; 9, 9:51, 19:46; 10, 5:42, 15:37; 11, 1:33,
11:29, 21:24; 12, 7:20, 17:15; 13, 3:11, 13:07, 23:02;
14, 8:58, 18:53; 15, 4:49, 14:44; 16, 0:40, 10:36,
20:31; 17, 6:27, 16:22; 18, 2:18, 12:14, 22:09; 19,
8:05, 18:00; 20, 3:56, 13:52, 23:47; 21, 9:43, 19:39;
22, 5:34, 15:30; 23, 1:25, 11:21, 21:17; 24, 7:12,
17:08; 25, 3:03, 12:59, 22:55; 26, 8:50, 18:46; 27,
4:41, 14:37; 28, 0:33, 10:28, 20:24; 29, 6:20, 16:15;
30, 2:11, 12:06, 22:02; 31, 7:58, 17:53.

These times assume that the Great
Red Spot is still centered at System II
longitude 230°. You'll find it transiting
1 2/3 minutes earlier for each degree that
it's at less than 230° longitude, and 1 2/3
minutes later for each degree greater.
A light blue or green filter slightly
helps the contrast and visibility of Jupiter's reddish and brownish features. An
orange filter helps with the blues.

Penumbral
Lunar Eclipse
On the morning of March 23rd, skywatchers in western North America and
Hawai'i can detect the southern side of
the full Moon skimming through the
pale penumbra (outer fringe) of Earth's
shadow. This weak eclipse will be deepest at 11:47 UT (4:47 a.m. PDT, 5:47 a.m.
MDT), when the Moon will intrude 78%
of the way across the penumbra's width.
That's not far enough for the most
obvious part of the penumbra to show,
but it's far enough that you should have
little trouble seeing that something is a
bit amiss. Fainter penumbral shading
may be detectable for nearly an hour
before and after mid-eclipse.
For observers in Australia and East
Asia, the event falls on the evening of
March 23rd local date.


http://www.is.gd/eclipse03092016

Sky and Telescope - March 2016

Table of Contents for the Digital Edition of Sky and Telescope - March 2016

Contents
Sky and Telescope - March 2016 - Cover1
Sky and Telescope - March 2016 - Cover2
Sky and Telescope - March 2016 - 1
Sky and Telescope - March 2016 - Contents
Sky and Telescope - March 2016 - 3
Sky and Telescope - March 2016 - A
Sky and Telescope - March 2016 - B
Sky and Telescope - March 2016 - 4
Sky and Telescope - March 2016 - 5
Sky and Telescope - March 2016 - 6
Sky and Telescope - March 2016 - 7
Sky and Telescope - March 2016 - 8
Sky and Telescope - March 2016 - 9
Sky and Telescope - March 2016 - 10
Sky and Telescope - March 2016 - 11
Sky and Telescope - March 2016 - 12
Sky and Telescope - March 2016 - 13
Sky and Telescope - March 2016 - 14
Sky and Telescope - March 2016 - 15
Sky and Telescope - March 2016 - 16
Sky and Telescope - March 2016 - 17
Sky and Telescope - March 2016 - 18
Sky and Telescope - March 2016 - 19
Sky and Telescope - March 2016 - 20
Sky and Telescope - March 2016 - 21
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Sky and Telescope - March 2016 - 24
Sky and Telescope - March 2016 - 25
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Sky and Telescope - March 2016 - 27
Sky and Telescope - March 2016 - 28
Sky and Telescope - March 2016 - 29
Sky and Telescope - March 2016 - 30
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Sky and Telescope - March 2016 - 76
Sky and Telescope - March 2016 - 77
Sky and Telescope - March 2016 - 78
Sky and Telescope - March 2016 - 79
Sky and Telescope - March 2016 - 80
Sky and Telescope - March 2016 - 81
Sky and Telescope - March 2016 - 82
Sky and Telescope - March 2016 - 83
Sky and Telescope - March 2016 - 84
Sky and Telescope - March 2016 - Cover3
Sky and Telescope - March 2016 - Cover4
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