Sky & Telescope - March 2020 - 44
MARCH 2020 OBSERVING
Planetary Almanac
PLANET VISIBILITY (40°N, naked-eye, approximate) Mercury: very low at dawn from the
13th to the 25th * Venus: high at dusk, sets in late evening * Mars, Jupiter, and Saturn: reasonably
high by dawn, close to each other in early March, very close by month's end
Mercury
21
11
March Sun & Planets
31
Venus
Date
Sun
Mercury
1
16
31
Mars
1
16
31
+40°
22h
20h
18h
+30°
-
-26.8
32′ 17″
-
0.991
31
0h
+4° 09′
-
-26.8
32′ 01″
-
0.999
1
22h
13.0m
-7° 23′
9° Mo
+3.7
10.6″
4%
0.631
11
21h 58.8m
-10° 58′
23° Mo
+0.9
9.4″
27%
0.718
21
22h 21.0m
-11° 07′
28° Mo
+0.2
7.8″
48%
0.861
31
23h 03.2m
1.005
1
+10° 46′
45° Ev
-4.3
18.8″
63%
0.889
11
2h 12.5m
+15° 22′
46° Ev
-4.4
20.5″
58%
0.815
21
2h 52.9m
+19° 24′
46° Ev
-4.4
22.6″
53%
0.739
31
3h 32.4m
+22° 45′
46° Ev
-4.5
25.2″
48%
0.662
1
18h
39.5m
-23° 32′
62° Mo
+1.1
5.5″
91%
1.712
16
19h
24.5m
-22° 41′
66° Mo
+1.0
5.9″
90%
1.590
31
20h
08.9m
-21° 07′
71° Mo
+0.8
6.4″
88%
1.469
1
19h 23.4m
-22° 04′
51° Mo
-2.0
34.2″
99%
5.767
31
19h 43.6m
-21° 22′
76° Mo
-2.1
36.9″
99%
5.337
1
19h
59.9m
-20° 36′
43° Mo
+0.7
15.5″
100%
10.734
31
20h
10.2m
-20° 08′
70° Mo
+0.7
16.1″
100%
10.320
Uranus
16
2h
07.9m
+12° 27′
38° Ev
+5.9
3.4″
100%
20.578
Neptune
16
23h 19.0m
-5° 31′
7° Mo
+8.0
2.2″
100%
30.918
The table above gives each object's right ascension and declination (equinox 2000.0) at 0h 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.org/almanac.
14h
12h
RIGHT ASCENSION
10h
8h
Castor
Pollux
BOÖ TES
CYGNUS
Mar
9-10
AQUILA
+10°
OPHIUCHUS
VIRGO
0°
5
LEO
Arcturus
HERCULES
+20°PEGASUS
Regulus
EC
T
LIP
AQUARIUS
Neptune
LIBRA
Mercury
-20°
CAPRICORNUS
19
Jupiter
Saturn Mars
16
-30°
SAGITTARIUS
10 am
13
IC
8 am
SCORPIUS
6 am
4 am
6h
4h
2h
31
Pleiades
Mar 2
CORVUS
+20°
28
Uranus
TAURUS
EQUATOR
Sirius
ERIDANUS
HYDRA
CANIS
MAJOR
LOCAL TIME OF TRANSIT
2 am
Midnight
10 pm
+30°
ARIES
Venus
Rigel
Spica
+40°
GEMINI
CANCER
Betelgeuse
Procyon
ORION
Antares
Fomalhaut
-40°
-7° 36′
38.5m
1
62%
16h
Vega
Distance
6.7″
16
PLANET DISKS have south up, to match the
view in many telescopes. Blue ticks indicate the
pole currently tilted toward Earth.
Illumination
0.0
Saturn
10"
Diameter
27° Mo
Jupiter
Neptune
Magnitude
-8° 18′
16
Uranus
Elongation
31.6m
Mars
Saturn
Declination
48.4m
22h
1h
Venus
Jupiter
Right Ascension
DECLINATION
Mar 1
8 pm
6 pm
4 pm
2 pm
The Sun and planets are positioned for mid-March; 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
MARCH 2 02 0 * SK Y & TELESCOPE
-10°
-20°
-30°
-40°
http://www.skyandtelescope.com/wp-content/observing-tools/almanac/almanac.html
Sky & Telescope - March 2020
Table of Contents for the Digital Edition of Sky & Telescope - March 2020
Contents
Sky & Telescope - March 2020 - Cover1
Sky & Telescope - March 2020 - Cover2
Sky & Telescope - March 2020 - 1
Sky & Telescope - March 2020 - Contents
Sky & Telescope - March 2020 - 3
Sky & Telescope - March 2020 - 4
Sky & Telescope - March 2020 - 5
Sky & Telescope - March 2020 - 6
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