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Binocular Icon 57 : Sagitta and M71

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#1 rodelaet

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Posted 18 June 2009 - 03:11 PM

Sagitta is a small but fascinating constellation. It fits completely in a common pair of binoculars. A fine bonus is offered by the presence of the loose globular, M71. This globular is visible as a hazy spot between Gamma and Delta Sagittae. The object is flanked by two mag 11 stars, one NW of the cluster and one S of the cluster. My 15x70’s shows both Gamma and Delta in one field of view. The whole field gives a great sense of depth. Gamma Sagittae (near the left edge of the sketch) is relatively nearby with a distance of 260 l-y. Delta Sagittae’s distance is about 460 l-y. M71 on the other hand is 13.000 l-y away, hovering at the edge of the galactic plane. From our line of sight towards M71, we probably have to look through a large portion of the dust and gas clouds of the galactic plane. It occurs to me that a lot of M71’s light might be blocked by interstellar absorption.
My choice of binoculars was the 15x70 (compared to my 8x56) to conquer the sky glow of our midsummer nights.

Site : Bekkevoort, Belgium ( 51° N )
Date : June 16, 2008
Time : around 23.30UT
Binoculars : TS 15x70 Marine
FOV: 4.4°
Filter : none
Mount : Manfrotto tripod and head
Seeing : 3/5
Transp. : 2.5/5
Sky brightness : 19.49 magnitudes per square arc second near zenith (SQM reading).
Nelm: 5.3
Sketch Orientation: N up, W right.
Digital sketch made with Corel Paint Shop Pro X2, based on a raw pencil sketch.

(Note: if the sketch does look too dark on your monitor, try to darken the room.)

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#2 Tommy5

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Posted 18 June 2009 - 03:24 PM

Very nice sketch, i use Sagitta as a jump off to find m-27, it is a cool little constellation in binoculars.

#3 frank5817

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Posted 18 June 2009 - 06:12 PM

Rony,

Excellent sketch of this very nice globular in Sagitta. :bow: :rainbow: :bow: It is always a treat to view this globular on a clear summer night and like T5 says you can use little Sagitta to move to M 27. Great sketching, those of us sketching in Chicagoland are waiting for a break in our strange weather. :cloudy:

Frank :)

#4 CarlosEH

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Posted 18 June 2009 - 06:30 PM

Rony,

A beautiful and accurate observation and report of Sagitta and M71. You have recorded the star field surrounding M71 perfectly. The stars appear to glow in your rendering. Thank you for sharing it with us all.

Carlos

#5 kraterkid

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Posted 18 June 2009 - 10:29 PM

Superb sketch and observation report Rony! :bow: :rainbow: :bow: Stunning sense of depth in this little gem of a constellation. These Binocular Icons are simply spectacular! :waytogo:

#6 daniel_h

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Posted 19 June 2009 - 12:10 AM

rony, more great work, well done - its too cold here in Aust. at the minute - I don't know how the Nth Americas & you europeans brave the cold to keep going during our summer

#7 olivier

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Posted 19 June 2009 - 04:02 PM

Hi Rony

Once again a very nice sketch.

What is amazing is that you need dark adaptations to see more details. It's really like looking through a real telescope.

#8 rd56

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Posted 20 June 2009 - 02:40 AM

Rony,

Beautiful rendering with exceptional detail. It does indeed appear as though one is viewing this through an actual eyepiece.

Ron

#9 Roel

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Posted 20 June 2009 - 04:45 AM

Incredible! The amount of stars in your sketch is just breathtaking. Because of the good rendering of their differences in brightening it looks very realistic. I also like the subtle contrast between both M71 and the surrounding field. It's very tempting to exaggerate contrast in a deepsky sketch, but you always make it just right.

I've read on your site that you're planning to publish your observation in a book. I'd be the first one to buy a copy!

#10 rodelaet

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Posted 21 June 2009 - 04:52 PM

Thanks, guys, for the kind words. :)

@Roel : Binoculars take in a lot of field, and also milkyway stars. The view from a realy dark site can be very discourageing to sketch from.






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