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March 2007
S M T W T F S
     
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Carpe Noctem - Seize the Night!



Image credit:copyright 2006 by Dr. Walter Koprolin (astro.nightsky.at)

ALDEBARAN AT DUSK

Thou art the star for which all evening waits--
O star of peace,come tenderly and soon,
Nor heed the drowsy and enchanted moon,
Who dreams in silver at the eastern gates
Ere yet she brim with light the blue estates
Abandoned by the eagles of the noon.
But shine thou swiftly on the darkling dune
And woodlands where the twilight hesitates.

Above that wide and ruby lake to-West,
Wherein the sunset waits reluctantly,
Stir silently the purple wings of Night.
She stands afar, upholding to her breast,
As mighty murmurs reach her from the sea,
Thy lone and everlasting rose of light.

George Sterling, 1911

Horsehead Nebula -B33



Image credit:sadly I can't remember who's drawing this is! If it is yours please email me so I can give you due credit. The annotations are mine.

Here is the long windbag version of how I find B33!

If you have a smaller scope (8") wait until the belt of Orion is as high as it gets or in the darkest part of the sky for your area. Seeing conditions have more to do with success than just about anything else (IMHO). Half of the time I am parked right on it and can't see it at all which can be both frustrating and tantalizing at the same time...so close and yet....

Start off on the eastern most star in Orion's belt, Alnitak or zeta Ori, move the scope east and look for the Flame Nebula, NGC 2024 Keep moving east and slide Alnitak out of the field of view, now if you can see the Flame nebula chance are that you will be able to see the Horsehead nebula. If you can't see the Flame then see if you can find a bigger scope or darker skies. If you don't see it at first step away close your eyes and let them re-dark adapt after looking at bright Alnitak. (These days I don't start at Alnitak but just to the west of her...)

Starting at Alnitak inch south to two relatively bright stars, the first one fainter, the second one brighter, 7th mag labeled "A" on the picture This is the higher-contrast, eastern edge of IC 434 the bright 'river' of nebulosity streaming south from Alnitak. East of the second star there is another star surrounded by not-so-faint nebulosity designated NGC 2023 start getting ready for looooooow contrast.

Drawing an imaginary line from NGC 2023 to the 7th magnitude star, and extending it across IC 434, you will find another two relatively bright stars (the northern one brighter "B", the southern one fainter) not quite aligned with the eastern edge of IC 434. Exactly there, at the eastern edge of IC 434, B33 is located. Make an equilateral triangle with "A" and "B" and the imaginary 3rd point to the south and just inside the imaginary 3rd point is B33.

To see it, use averted vision and keep the eye steady by fixing one of the stars. If the conditions are excellent and you get a little experience in observing B33, you can even detect the Horsehead shape. Experiment with power and filters but don't give up! If you don't get it then try again another night...you are probably right on top of it!

My mistake each time is to look for something small and contrasty...you need to look for a larger, dark mass protruding (east to west) into IC 434 with optically very little contrast except with a large scope and darker skies (and maybe a little filtering). I can usually make out the flat top and the bulge of the head but not the snout...not on the 8".

Stellarium

We recently had our Student Program learn to write scripts in Stellarium (with a lot of help from one of our super-parents, Bob!) for their annual public night presentation on the "Constellations". If you haven't played with Stellarium scripts it is a lot of fun and somewhat addicting. You will end up spending a lot more time than you think!

Stellarium zip file

Messier_aff.sts -This is one that I wrote (I'm a beginner too!)for our "Get ready for the Messier Marathon" meeting. It goes through an alternate selection of the viewing order, at least the beginning is different. The beginning of the file runs while we talk about what you need for the marathon. Press "K" to advance from object to object (M40 is missing from Stellarium) at each title break it will spin to the next object by itself and then you can continue to advance as you wish. REMEMBER! This was programmed in a hurry and I haven't had a chance to work with it since. But I will get it cleaned up soon.

You will want to comment out the landscape or if you want to see what it is like to view from our observing hill at the college then go to the TAS website and download our landscape files. Follow the directions included in the file to add the TAS Ft. Steilacoom landscape to your Stellarium.

Messier Marathon

The ultimate Messier Marathon site...SEDS!
As far as the order you use there are several lists on the above site but I like the logic behind Tom Polakis' order.

Southern Hemisphere

-September would be a good time for a marathon of "Bennett List" and "Best Sky Objects from SAAO latitude"

Sun

sunspots

Listener Feedback

Cloudy Nights Telescope Review

Quick News

New Horizons - This dramatic image of Io was taken by the Long Range Reconnaissance Imager (LORRI) on New Horizons at 11:04 Universal Time on February 28, 2007, just about 5 hours after the spacecraft's closest approach to Jupiter. The distance to Io was 2.5 million kilometers (1.5 million miles) and the image is centered at 85 degrees west longitude. At this distance, one LORRI pixel subtends 12 kilometers (7.4 miles) on Io.



Time again for the Globe at Night program!

Planets



Evening Planets
  • Venus - Mag -3.9 moving from Pisces to Aries absolutely wonderful. The only thing shining through the cloud cover here in the Pacific NW.
  • Saturn - Mag 0.0 on the western edge of Leo just now north-west of Regulus between the curve of the question mark and Regulus. Nice and high in the early evening!
Morning Planets
  • Jupiter - Mag -2.1 in southern Ophiuchus in the south before dawn to the southwest is Antares.
  • Mars - Mag 1.2 in Capricorn just above the Sun's glare in the southeast
  • Mercury - Mag 0.5 in Aquarius very low at dawn between Mars and the horizon
Lost in the Sun's glare
  • Neptune and Uranus

Constellations



Monoceros (moh-NOSS-er-us) - the Unicorn
Introduced by: very old, reported found on Persian spheres
Best known stars: Plaskett's Star-HR 2422 Monocerotis one of the most massive binaries known, with two hugely massive blue-white class O (as best we can tell, O7.5 and O6) supergiants tightly orbiting each other with a period of only 14.40 days.
Beta Mon-triple star system a great triple star system, especially for smaller telescopes. William Herschel, discovered it in 1781
Deep sky objects: The Rosette Nebula, 2237, 2238, 2239, and 2246. Inside the clear center of the rose is open cluster 2244. On the southeast corner of the nebula is 2264 another bright open cluster.
Also the fan/comet-shaped Hubble's variable nebula NGC 2261, which is associated with the very young star R Monocerotis at its southern tip. A friend just brought an image in to our last meeting of Hubble's variable and it was quite impressive!
M50 This is a cluster of about a hundred bright stars, rather tightly grouped, ideal for small telescopes. It can even be seen by the naked eye on a good night. There is a red star near its center.
NGC 2506 is a beautiful , bright mag 7.6, densely packed open cluster...almost a wanna-be globular cluster!
Double stars: Epsilon Mon is a fixed binary
Variable stars: S Monocerotis located at the center of NGC 2264

Viewing

Naked eye and binoculars M44 - Praesepe (the manger) or the Beehive Cluster in Cancer
M31, M32, M110 in Andromeda
NGC 2232 small open cluster in Monoceros, mag 4.2 the stars make a 'wedge' shape

Telescope -

Northern Hemisphere chart Taki's chart Maps 78 and 79
Southern Hemisphere chart Taki's chart Map 55, Map 104, Map 108
M35 in Gemini near Castor's foot but what is more interesting is the neighbor... NGC 2158, NGC 2174 and 2175
IC 418 planetary nebula in Lepus nicknamed the Raspberry Nebula at 9.6 mag in a smaller scope it doesn't appear to have the red color large scope can claim, slightly bluish (bottom of map 104).

Viewing challenges:

NGC 404 just off of beta Andromeda 10.2 mag galaxy, interesting and tough with beta so bright.
NGC 613 10.1mag in Sculptor (map 108) you need a lot of mirror for this one. Galaxy with a very long 'core'.
NGC 2185 in Monoceros a pair of nebula the eastern one looks like a tulip.

Comets

Comets for the Month.

Check out the Sky Hound site.
"One touch of nature makes the whole world kin"
-- Shakespeare

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Music

Celtic Stone's "Drowsy Maggie" (should we re-name it drowsy Alice after this weekend!)
Ariaphonic's Sposa son disprezzata

Woodland Hills Camera and Telescope is offering FREE web hosting on our servers for you or your organization's website. In order to promote the hobbies of Astronomy, Astrophotography, Photography, Birding or generally any topic that is of interest to our customer base, Woodland Hills Camera and Telescope is offering Hosting Grants.


Direct download: AAGGshow37.mp3
Category: Deep Sky Objects -- posted at: 1:17 PM
Comments[6]



Download this month's sky map!

Kym Thalassoudis does a wonderful job creating accurate and easy to use star maps every month! Visit his site at www.skymaps.com for skymaps and links to other useful astronomical sites. Also a great portal for astronomical gifts!

Northern hemisphere sky map
Southern hemisphere sky map

Those in the Southern Hemisphere should also visit James Barclay's site for a great tour of the Southern Hemisphere December sky.

Another great site for Southern Hemisphere viewers is the Royal Astronomical Society of New Zealand's Southern Hemisphere Calendar can be found at the RASNZ site
Ian Musgrave has a very handy Southern Hemisphere site called Southern Sky Watch.

Download "What's up 2007: 365 days of Skywatching" by Tammy Plotner, published by Universe Today (Faser Cain) it is a fantastic and it is free!

Planets for March 2007

Mercury After the first week of March look for Mercury in the morning twilight, for Northern observers your lower latitudes are more favorable. For S.H. viewers Mercury puts on its best show all year. On the 23rd look for the 0.2 mag planet 10 deg even before astronomical twilight and will stand out in the dark eastern sky 2.8 mag (1st) to 0.2 mag (21st)

Venus Brilliant for both N.H. and S.H. observers. Shining right through the clouds in the Pac NW! Telescopes will show Venus as small and more than 80 percent illuminated -3.8 mag (1st) to - 3.9 mag (21st)

Mars In Capricornus rises after Jupiter and about 1.5 hours before the Sun 1.3 mag (1st) to 1.2 mag (21st)

Jupiter In Ophiuchus rising mid-month around midnight making it easier to squeeze into night time observing. For those of you who like the early morning observing Jupiter you will find him NW of Antares in a beautiful part of the sky, just West of Sagittarius. On the 3rd Jupiter is 90 deg West of the sun providing observers with shadows thrown farthest west and a greater chance of Galilean satellite eclipses. -2.0 mag (1st) to -2.2 mag (21st)

SaturnBeautiful and high in the ESE at dusk. Saturn creeps further West away from Regulus but still near the paws of the Lion. 0.0 mag (1st) to 0.1 mag (21st)

Uranus 5.9 mag (1st) to 5.9 mag (21st)

Neptune will camp out in Capricorn all year long 8.0 mag (1st) to 8.0 mag (21st).

Key Dates for March 2007

Days and Times in UT (help with time) Great site for sunrise and sunset times and a downloadable toolbar application by Steve Edwards

Observations are for 9pm for everyone...happy Equinox!

Astronomical Highlights
March

3 -Full Moon 23:17 UT

-Total Lunar Eclipse
5 -Uranus in conjunction with the Sun
6 -Zodiacal Light visible in N lat. in the West after evening twilight for next two weeks

-Sun's N pole most inclined (7.25 deg)away from Earth
7 -Mercury stationary

-Moon at apogee 4:00 UT

-Spica 1.3deg N of Moon
11 -Daylight Saving Time begins (goofy Congress)

-Antares 0.7deg N of Moon, possible occultation, check IOTA for occultation at your location (Antarctica, southern part of S. America)
12 -Last Quarter Moon 3:54UT
16 -Mars 1.9deg N of Moon 1:00 UT
17 -Mercury 1.4deg N of Moon, possible occultation, check IOTA for occultation at your location
19 -New Moon 2:43 UT, partial solar eclipse

-Moon at perigee Large tides
21 -Equinox 0:07 UT
22 -Mercury at greatest elongation W (28 deg)
25 -First Quarter 18:16 UT
28 -Moon 1.8 deg N of M44 (Beehive Cluster)
29 -Saturn 1.2 deg S of Moon, possible occultation, check IOTA for occultation at your location (N British Isles, N Scand., N Atlantic, E Greenland)
30 -Regulus 1.1 deg S of Moon, possible occultation, check IOTA for occultation at your location (W Europe including British Isles, Scand., Arctic regions)


Monthly Messier*

This month highlights 10 messier objects, most are within reach of binoculars, and over half can be seen with the naked eye.

  • M41 - This cluster is visible as a hazy patch to the naked eye just below Sirius in Canis Major. M41 is resolvable in binoculars and appears fairly loose in telescopes at low power.
  • M93 - This is a small fuzzy patch of light in Puppis, partially resolvable in binoculars. The hardest part of finding this cluster in binoculars is picking it out of a fairly rich region of the Milky Way. Use low power to examine this cluster and the surrounding richness in a telescope. Medium power provides a nice view of the cluster itself.
  • M47 - A bright cluster in Puppis, easily visible as a hazy patch to the naked eye. Binoculars will show a large hazy patch with many stars resolvable. Telescopes show a fairly loose cluster with stars of wide variety of magnitudes.
  • M46 - This cluster is right next to M47 and is also visible to the naked eye. In binoculars M46 appears as a large hazy patch with no stars resolvable, giving a nice contrast to M47. In telescopes at low powers this cluster evenly fills the eyepiece. While you are here go to medium or high power and look for the planetary nebula NGC2438. It will appear as a faint uneven ring, with a blue/green color.
  • M50 - An open cluster in Monoceros. This is a small hazy patch in binoculars, partially resolvable. Like M93, the richness of the surrounding field is the only difficulty in finding this object. This is a fairly tight cluster at low power in a telescope.
  • M48 - Moving on to Hydra, we find another naked eye cluster. M48 is a large fuzzy patch in binoculars, partially resolvable. Use low to medium power in your telescope for a spectacular view.
  • M67 - In the southeast portion of Cancer is another open cluster, barely visible as a fuzzy patch to the naked eye. Binoculars show M67 as a large hazy patch of light, similar to M46. Use low power to resolve this large, rich cluster in a telescope.
  • M44 - Known as the Praesepe or Beehive Cluster, this open cluster is easily visible to the naked eye as a large, fuzzy patch bigger than the moon. Binoculars or rich field telescopes provide the best view of M44.
  • M81, M82 - This pair of galaxies in Ursa Major are very possible to see in binoculars, they look like a pair of fuzzy stars. Both galaxies will fit into the same low power telescope field. M81 will appear as a large oval gray patch of light. M82 is a pencil like streak of light next to and perpendicular to the long axis of M81.
*Monthly Messier information gleaned from the Royal Astronomical Society of Canada, Moncton Centre Quebec and from the Astronomy Connection website.

Astronomical Highlights for 2007

Earth's major motions for 2007
Perihelion
Jan 3 20h(UT)
First Cross Quarter Day
Feb 2-6
Equinox
Mar 21 00:07(UT)
Second Cross Quarter Day
May 4-7
Solstice
June 21 18:06(UT)
Aphelion
July 4 00h (UT)
Third Cross Quarter Day
Aug 5-8
Equinox
Sept 23 19:51(UT)
Fourth Cross Quarter Day
Nov 5-8
Solstice
Dec 22 06:08(UT)

Planet Positions for 2007

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Venus Sgr Aqr Psc Ari Tau Gem Leo Sex Cnc Leo Leo Vir
Mars Oph Sgr Cap Cap Aqr Psc Ari Tau Tau Gem Gem Gem
Jupiter Oph Oph Oph Oph Oph Oph Oph Oph Oph Oph Oph Oph
Saturn Leo Leo Leo Leo Leo Leo Leo Leo Leo Leo Leo Leo
Uranus Aqu Aqu Aqu Aqu Aqu Aqu Aqu Aqu Aqu Aqu Aqu Aqu
Neptune Cap Cap Cap Cap Cap Cap Cap Cap Cap Cap Cap Cap

Eclipses for 2007

March 19 - partial solar eclipse (see map, times, and animation!): The first solar eclipse of 2007 occurs at the Moon's ascending node in Pisces and is visible from eastern Asia and parts of northern Alaska

September 11 - partial solar eclipse (see map, times, and animation): The last eclipse of 2007 is a partial solar eclipse at the Moon's descending node in southern Leo. Its visibility is confined to parts of South America, Antarctica and the South Atlantic

March 3-4 - total lunar eclipse (see map): The beginning of the umbral phase visible in the Arctic region, Africa, Europe, Asia except for extreme eastern region, most of Indonesia, western Australia, Queen Maud Land of Antarctica, extreme eastern South America, Greenland, the Indian Ocean, the South Atlantic Ocean, and the eastern North Atlantic Ocean; the end visible in Africa, Europe, western Asia, Queen Maud Land of Antarctica and Antarctic Peninsula, South America, eastern North America, Greenland, the Arctic region, the Atlantic Ocean, the western Indian Ocean, and the extreme eastern South Pacific Ocean.

August 28 - total lunar eclipse (see map): The beginning of the umbral phase visible in North America, South America except extreme east, Antarctica except for Enderby Land, New Zealand, eastern Australia, extreme northeastern Asia, the Pacific Ocean, and the western Atlantic Ocean; the end visible in New Zealand, Australia, most of Antarctica except Queen Maud Land, Indonesia, eastern Asia, western North America, the Pacific Ocean, and the southeastern Indian Ocean.

Eclipse information from: NASA Eclipse Homepage, Eclipses Online (HM Nautical Almanac Office, UK in coordination with the U.S. Naval Observatory)

Meteor Showers for 2007

As luck would have it, all the major meteor showers reach their peaks in 2007 with the Moon out of the sky. Any of these showers can produce dozens of shooting stars each dark hour leading up to dawn.

Mark your calendar to look for...
  • Lyrids on April 23rd
  • Perseids on August 13th
  • Orionids on October 21st
  • Leonids on November 18th
  • Geminids on the night of December 13-14 (Meteor enthusiasts are keenly awaiting the Geminids in 2007 because their progenitor, the defunct comet Phaethon, precedes them in a flyby of Earth on December 10th.)

Comets for March

Gary Kronk's comet and meteor pages
Skyhound Comet pages

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Music Scottish Guitar Quartet -"Romance within you"
The Gentle Good - "Heuldro Haf"
Scottish Guitar Quartet -"Circle"

Direct download: AAGG_sky_tour_Mar_07.mp3
Category: Sky Tours -- posted at: 10:43 AM
Comments[2]