Star Calendar – October 2015

Star Calendar

October 2015

Star Calendar Planets:

Moon moves through the stars, eastward, at its own diameter every hour, or, 13 degrees per day, or, one season per week — as noted below.

Mercury is pretty bright now and is at greatest elongation mid-month. Those with a clear view to the east might pick him out due east at about 5:00AM

Venus is in her afterglow after her maximum brilliance last month. She is still at a large angle from the Sun and can be seen during the daytime with a little care. Look about 45 degrees (half a right angle) ahead of (right of) the Sun and patiently let the eyes linger, wandering in slowly larger circles around the chosen spot in the sky. Don’t look too hard or dart around too much. Once you see Venus you’ll wonder why it seemed so impossibly invisible to begin with — it just stands there sharp and bright; but if you go out another time it’s just as hard to find again!

Sun no longer gets high enough in our sky to create Vitamin D in our skin. The rule of thumb is that if your shadow is longer than you are tall, you are not getting the rays that stimulate that beneficial nutrient. The native northern-clime peoples make up for this with a very fatty acid (fish oil) diet. Those that shower daily might consider skipping the soap unless it’s actually needed; Vitamin D is an oil kept in your skin and it washes off with soap! UVA lights will give a suntan — but it is UVB or UVC that is needed to make Vitamin D.

Mars should now be visible, east in morning nautical twilight (around 5:00AM). As October opens he will be below Regulus and slightly dimmer. Venus stands higher, very bright, and Jupiter below, quite bright as well. On the 9th the Moon will stand just to the right; on the 18th Jupiter will stand very close by and he will finally have a sojourn with Venus on Nov.2nd.

Jupiter is the brightest object beneath Venus in the morning.

Saturn is low in the SW these evenings. He shuffles into Scorpius on the 16th, accompanied over the threshold by a crescent young Moon that night. They are SW at about 6:00PM

Star Calendar Dates:

1      Sunrise/sunset in Spring Valley at 6:53/18:38 EDT (11h45m daylight)

2      Moon near Aldebaran high in SW at 5:00AM

3      Moonrise most north-of-east for month, at 10:15PM

8      Moon above Venus, beside Regulus in east at 5:00AM

          Mars above Jupiter, a little lower in the east

          Mercury stationary to retrograde

9      Moon beside Mars, above Jupiter in east at 5:00AM

          Draconid meteors (?) from overhead in late evening

11      Moon rises due east, thin and very low, to right of Mercury at around 5:AM

12      Uranus in opposition, up all night in Pisces, (for binoculars)

14      Islamic year 1437 A.H. begins at sundown

15      Mercury at greatest elongation, visible in morning nautical twilight low in east

16      Moon above Saturn in WSW at 6:15 PM, both in Scorpius, near Antares

18      Jupiter to right of much dimmer Mars (both below Venus) in east at 5:AM

          Moonrise most south-of-east for month, at 11:15AM

24-25 Standard Time resumes in Europe

          Moon rises due east at 3:30PM

25      Venus to right of much less bright Jupiter in east at 5:00AM

26      Venus at greatest elongation, largest angle from Sun

27      Full Hunter’s Moon 8:05AM

29      Moon rises below Aldebaran, ENE at 8:00PM

31      Sunrise/sunset in Spring Valley at 7:26/17:53 EDT (10h27m daylight)

          Waning gibbous Moon rises 3 hours after darkness falls on Halloween

          Moon rises most north-of-east again, just before 9:00PM

Star Calendar Addenda – October 2014

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Comet Siding

Comet Siding

Comet Siding Spring approaching Mars – photo from Australia by Damian Peach. Better (bigger) photo at:

Now THAT’S an image with dynamic range!   (NASA’s version is composite.)

The Sun, Oct. 16 – 24, 2014 as sunspot 2192 develops:

Sun Spot 01 Sun Spot 02 Sun Spot 03

Sun Spot 04 Sun Spot 05 Sun Spot 06

Sun Spot 07 Sun Spot 08 Sun Spot 09

Star Calendar – October 2014

Star Calendar

October 2014

Star Calendar Planets:

Moon and Earth play hit-or-miss with their shadows this month. The Moon sets an hour before sunrise on the 8th,just as it is engulfed by the shadow of the earth. Two weeks later, on the 23rd, we just miss a partial Sun eclipse because the Moon’s shadow approaches just as the Sun sets. Those substantially west of here will have an annular solar eclipse. The first sighting of the Moon in Egypt, following this event begins the Islamic year 1436 A.H.

Mercury pulls a rapid switcheroo this month, moving from evening to morning, and will have a decent showing near the end of this month. He is stationary to retrograde on the 4th, crosses the nearside of the Sun on the 16th, and reverts to normal motion on the 25th.

Venus makes a more lugubrious counter-switch and is invisible all month as she crosses the farside of the Sun on the 25th.

Sun gives us another hour and eighteen minutes less daylight over the course of this month. U.S. “Daylight Time” does not end until November 2, but the clocks are turned back in Europe on the 26th of this month – probably because the center of population there is further north.

Mars has passed Antares and relaxes into the wintry realms of Sagittarius while slightly dimming. Mars is above the horizon fewer than 9 hours a day this month – rising after 11:AM, setting around 8:PM. Mars crosses the winter colure on the 26th and will emerge from below the celestial equator next on Feb. 21, 2015.

Jupiter crosses into Leo on the 14th and is seen gradually nearer Regulus, both being higher each morning. He is still well north of the celestial equator and will not cross south of it for another two years.

Saturn eventually succumbs to the overtaking Sun and will not be seen again until some morning in late November. Saturn is in the midst of a long decline into the lower realms of the sky, not crossing the winter colure until Dec. 2017.

Uranus is in opposition and at its brightest this month. It should be visible with binoculars as a slightly greenish spot in Pisces, appearing in the SE about halfway up the sky, and below Alpheratz of the Square of Pegasus around 10 PM. It is necessary to avoid a moonlit sky, so looking after the 14th or so would be best. This is an object at the threshold of perception – theoretically a rare naked-eye object – but somehow missed by the keen observers of antiquity. Most people still never see it in their lifetime. Continue reading

Star Calendar – October 2007

Star Calendar

October 2007

Star Calendar Planets:

Mercury will sneak past the near side of the Sun (inferior conjunction) on Oct 23, then rush to the eastern morning sky in the end of the month. On November 7 it will appear to the left of Spica, just below and to the left of the waning crescent moon.

Venus shines brightly at about the same height at a given time each morning all month. Watch Regulus and Saturn rise higher and higher each day. On October 7th the waning Moon will join them. Venus waxes gibbous by the end of the month, but becomes more distant too.

Mars makes its longest path across our sky on October 1st and is highest at 5:15AM. Look above Betelgeuse of Orion. Mars is now closer to us than is the sun and it brightens as it draws ever closer and slows its movement against the stars. Watch for the Orionid meteors radiating from the vicinity on or about the 21st .

Jupiter remains in Ophiucus and accelerates its direct motion as it begins to fade. By month’s end it will be noticeably lower in the evening sky.

Saturn appears relatively dim in the eastern morning sky and will create an interesting series of triangles with Venus and Regulus all month. Continue reading