Manx skies... September
2017 ~ compiled by Dave Storey
Note: All times are
Universal Time (UT)
British Summer Time
is now in force. Remember to add 1 hour to any times quoted here
to get local IoM time.
Equinox occurs on 22nd
are no solar or lunar eclipses this month.
Solar activity is low with
24 now in force.
NEVER DIRECTLY OBSERVE THE SUN WITH YOUR NAKED EYES AND/OR OPTICAL
INSTRUMENTATION: YOU WILL BE BLINDED!
Solar Rotation number 2195 starts on the 12th at 17h28m30s.
a morning object, reaching greatest
western elongation on 12th
it will be 18° to the right of the Sun. On the 1st,
the planet will be shining at magnitude
+3.5 with a phase of 5.6% illuminated and disk size of 10 arc
seconds. It will rise at 04.42h on this date. By the 12th,
the planet will be at magnitude -0.3 and the phase will have
increased to 44.8% and disc size down to 7.3 arc seconds. The
bright star Regulus will be seen upper right of Mercury on this
date with planet Mars 2.7° to the lower left of Mercury.
Mars will be at a dimmer magnitude of +1.8. A close conjunction of
Mars and Mercury occurs on the 16th
Mars is 3.3 arc minutes below Mercury. The actual conjunction
occurs at 18.43h so is not visible from the IoM. At
dawn of the morning of the 16th,
Mars will be seen less than half degree lower left of Mercury. The
day after conjunction on the 17th, Mars will be seen 20 arc
seconds upper right of Mercury.
be found in the dawn skies shining at a brilliant -3.9. As seen
through a telescope, the planets disc will have an apparent
diameter of 12.5 arc seconds and phase of 83.4% illuminated on the
By the end of the month, the disc will have shrunk down to 11.2
arc seconds and have a phase of 90.5%. Venus will be close to the
open star cluster Messier 44 in Cancer during the first few days
of the month and should prove a nice binocular sight. A
nice grouping of Venus with the thin crescent Moon and the star
Regulus occurs on the morning of the 18th.
Well worth looking at through binoculars. On the morning of the
Venus will be seen about ½° to the left of the star
passed solar conjunction, Mars is viewable in the dawn skies in
the east. It rises at 04.11h on the first, shining at magnitude
+1.8. By the end of the month, it will be rising at 04.07h. The
planet is still a great distance from Earth and will have an
apparent disc size of less than 4 arc seconds, so is not a viable
telescopic target. As mentioned above, Mars has a conjunction with
Mercury on the 16th
Will be low down in the west
after sunset and poorly placed for viewing this month.
in Ophiuchus during the month shining at magnitude
+0.4. It will be seen low
down in the southern skies after sunset. The bright moon Titan
can be seen west of the planet on the 7th
. It will be east of the planet
on the 15th
. Saturn will be 3.6° to the
lower left of the near half Moon on the evening of the 26th.
on the 5th
will be shining at magnitude
+7.8. It will be found 1.2° to the left of the star lambda
Aquarius. The Full Moon will be close by on the day of opposition.
Use the charts below to track down this planet.
in upper map is shown below
meteors are active during September and October. There are three
nights of peak activity; 9th
and one on 13th
The rate is low with 10 meteors (ZHR)
on the 9th
5 per hour on the 21st
Radiants for 9th
RA 00h36m Dec. +07° and 00h24m Dec. 00° respectively.
Brighter than Magnitude +6.0)
Magnitude. P.A. Type of event. Notes
18.46:35 2223 159370 +3.9 082° DD Gamma
18.52:16 2886 162964 +4.3 126° DD 56
For very detailed list of occultations visible
this month, click here.
Data from Occult Software.
are UT as seen from IoMAS Observatory. Start to observe these
events about 20 minutes before the above times to allow for
differences in your latitude and longitude. This will give you
time to locate the star that is about to be occulted.
= Zodiacal Catalogue. Type of Event DD = disappearance at dark
limb, RD = Reappearance at dark limb. RB = Reappearance on bright
limb. PA = Position Angle around limb of the Moon, where 0 degrees
is north, 90 degrees is east, 180 degrees is south and 270 degrees
D* = Double Star
The above predictions were
calculated from Occult software by David Herald. More information
regarding this software may be found at the lunar-occultations.com
star drops from magnitude
+2.1 to +3.4 in about 5 hours. Suitable events visible from the
Isle of Man this month occur on 6th
23.12h and 29th
here for a star chart for Algol.
There are no bright comets
visible this month.
The international Space
Station crosses the Manx skies on a regular basis. For the latest
information on when the ISS is due to pass across the sky over the
next ten days, visit the link below.
transit Information from Heavens Above.com
for Manx Night Skies
Handbook of the British Astronomical Association 2017. BAA.
Stargazing 2017. Heather Couper & Nigel Henbest.
2017 Guide to the Night Sky. Storm Dunlop &
Wil Tirion. Collins 2016
2017: An Astronomical Year (U.K.
Edition) Richard J. Bartlett. October 2016
Yearbook 2017. Sky
at Night. BBC. Immediate Media Company, Bristol. 2016
Yearbook of Astronomy. Richard Pearson & Brian Jones. CPI
Group (UK) Limited. 2017
Observer's Handbook Meteors.
Neil Bone. Philip's 1993
Atlas of the Night Sky. Storm Dunlop.
Constellations. Josef Klepešta and Antonin
Rükl. Hamlyn. 1979
Brilliant Stars. Patrick Moore. The
Book People Ltd. 1996
Complete Guide to Stargazing. Robin
Scagell. Phillip's. 2006
Turn Left at Orion. Guy Consolmango
and Dan M. Davis. Cambridge U.P. 2008
Norton's 2000.0 Edited
Ian Ridpath. Longman Scientific & Technical. 1989
Planetary data derived from
Picture graphics derived from Stellarium
and Guide 9 Software.