Sky & Telescope - September 2016 - 44
OBSERVING
Planetary Almanac
Sun and Planets, September 2016
Mercury
September Right Ascension Declination
30
1
16
30
16
1
30
-
-26.8
31′ 42″
-
1.009
30
12h 25.8m
-2° 47′
-
-26.8
31′ 56″
-
1.001
1
11h
48.7m
-3° 21′
20° Ev
+1.3
9.6″
21%
0.698
11
11h
26.1m
-0° 30′
5° Ev
+4.8
10.6″
2%
0.636
21
11h 02.3m
+5° 11′
14° Mo
+1.5
8.9″
15%
0.752
30
11h 22.7m
+5° 28′
18° Mo
-0.7
6.8″
56%
0.989
1
12h
09.4m
+0° 07′
23° Ev
-3.8
10.9″
92%
1.528
11
12h
54.0m
-5° 01′
26° Ev
-3.8
11.3″
90%
1.481
21
13h 39.0m
-10° 00′
28° Ev
-3.9
11.7″
88%
1.430
30
14h 20.6m
-14° 11′
31° Ev
-3.9
12.1″
86%
1.381
1
16h
47.9m
-25° 09′
95° Ev
-0.3
10.5″
85%
0.895
16
17h
26.9m
-25° 49′
89° Ev
-0.1
9.5″
85%
0.980
30
18h 06.7m
-25° 51′
84° Ev
+0.1
8.8″
85%
1.061
1
11h 54.3m
+1° 49′
19° Ev
-1.7
30.8″
100%
6.392
30
12h
17.1m
-0° 40′
-1.7
30.6″
100%
6.452
1
16h
33.7m
-20° 24′
91° Ev
+0.5
16.7″
100%
9.968
30
16h 39.9m
-20° 42′
64° Ev
+0.5
15.9″
100%
10.434
16
1h 27.6m
Mars
Jupiter
Jupiter
Saturn
16
Uranus
Saturn
Neptune
Pluto
Uranus
Neptune
8h
Castor
Pollux
+30°
GEMINI
6h
4h
2h
Pleiades
+5.7
3.7″
100%
19.075
16
-8° 37′
167° Ev
+7.8
2.4″
100%
28.975
16
19h
03.3m
-21° 24′
111° Ev
+14.2
0.1″
100%
32.796
0h
22h
RIGHT ASCENSION
20 h
23
26
+10°
Mercury
0°
Procyon
20
TA U R U S
CANCER
E R ID A N U S
H Y D R A
CANIS
MAJOR
-30°
8 am
6 am
CETUS
AQUARIUS
AQUILA
12
CAPRICORNUS
Fomalhaut
4 am
Arcturus
OPHIUCHUS
Neptune
LOCAL TIME OF TRANSIT
2 am
Midnight
14 h
BOÖTES
HERCULES
PISCES
Sept
16 -17
Rigel
Sirius
10 am
Uranus
E Q U AT O R
ORION
16h
CYGNUS
Betelgeuse
-10°
18h
Vega
PEGASUS
+20°
-40°
150° Mo
47.6m
ARIES
LEO
-20°
+8° 30′
22h
Planet disks at left have south up, to match the view in many telescopes. Blue ticks indicate the pole currently tilted
toward Earth.
10"
10 h
+40°
3° Mo
The table above gives each object's right ascension and declination (equinox 2000.0) at 0 h Universal Time on selected
dates, and its elongation from the Sun in the morning (Mo) or evening (Ev) sky. Next are the visual magnitude and
equatorial diameter. (Saturn's ring extent is 2.27 times its equatorial diameter.) Last are the percentage of a planet's disk
illuminated by the Sun and the distance from Earth in astronomical units. (Based on the mean Earth-Sun distance, 1 a.u.
is 149,597,871 kilometers, or 92,955,807 international miles.) For other dates, see SkyandTelescope.com/almanac.
16
Pluto
Distance
+8° 17′
Venus
Mars
Illumination
10h 41.5m
Mercury
Venus
Diameter
10 pm
ECL
LIBRA
8
Pluto
IPTIC
SAGITTARIUS
8 pm
VIRGO
Mars
Saturn
DECLINATION
21
11
Magnitude
1
Sun
Sept 1
Elongation
-10°
Spica
CORVUS -20°
-30°
2 pm
The Sun and planets are positioned for mid-September; the colored arrows show the motion of each during the month. The Moon is plotted for evening dates in the Americas when it's waxing
(right side illuminated) or full, and for morning dates when it's waning (left side). "Local time of transit" tells when (in Local Mean Time) objects cross the meridian - that is, when they appear
due south and at their highest - at mid-month. Transits occur an hour later on the 1st, and an hour earlier at month's end.
44
September 2016 sky & telescope
+10°
Venus
5
Antares
4 pm
+30°
+20°
Jupiter
SCORPIUS
6 pm
12h
-40°
http://www.SkyandTelescope.com/almanac
Sky & Telescope - September 2016
Table of Contents for the Digital Edition of Sky & Telescope - September 2016
Contents
Sky & Telescope - September 2016 - Cover1
Sky & Telescope - September 2016 - Cover2
Sky & Telescope - September 2016 - 1
Sky & Telescope - September 2016 - Contents
Sky & Telescope - September 2016 - 3
Sky & Telescope - September 2016 - A
Sky & Telescope - September 2016 - B
Sky & Telescope - September 2016 - 4
Sky & Telescope - September 2016 - 5
Sky & Telescope - September 2016 - 6
Sky & Telescope - September 2016 - 7
Sky & Telescope - September 2016 - 8
Sky & Telescope - September 2016 - 9
Sky & Telescope - September 2016 - 10
Sky & Telescope - September 2016 - 11
Sky & Telescope - September 2016 - 12
Sky & Telescope - September 2016 - 13
Sky & Telescope - September 2016 - 14
Sky & Telescope - September 2016 - 15
Sky & Telescope - September 2016 - 16
Sky & Telescope - September 2016 - 17
Sky & Telescope - September 2016 - 18
Sky & Telescope - September 2016 - 19
Sky & Telescope - September 2016 - 20
Sky & Telescope - September 2016 - 21
Sky & Telescope - September 2016 - 22
Sky & Telescope - September 2016 - 23
Sky & Telescope - September 2016 - 24
Sky & Telescope - September 2016 - 25
Sky & Telescope - September 2016 - 26
Sky & Telescope - September 2016 - 27
Sky & Telescope - September 2016 - 28
Sky & Telescope - September 2016 - 29
Sky & Telescope - September 2016 - 30
Sky & Telescope - September 2016 - 31
Sky & Telescope - September 2016 - 32
Sky & Telescope - September 2016 - 33
Sky & Telescope - September 2016 - 34
Sky & Telescope - September 2016 - 35
Sky & Telescope - September 2016 - 36
Sky & Telescope - September 2016 - 37
Sky & Telescope - September 2016 - 38
Sky & Telescope - September 2016 - 39
Sky & Telescope - September 2016 - 40
Sky & Telescope - September 2016 - 41
Sky & Telescope - September 2016 - 42
Sky & Telescope - September 2016 - 43
Sky & Telescope - September 2016 - 44
Sky & Telescope - September 2016 - 45
Sky & Telescope - September 2016 - 46
Sky & Telescope - September 2016 - 47
Sky & Telescope - September 2016 - 48
Sky & Telescope - September 2016 - 49
Sky & Telescope - September 2016 - 50
Sky & Telescope - September 2016 - 51
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Sky & Telescope - September 2016 - 79
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Sky & Telescope - September 2016 - 84
Sky & Telescope - September 2016 - Cover3
Sky & Telescope - September 2016 - Cover4
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