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Astrophotography and Sketching >> Sketching

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CarlosEH
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Reged: 01/19/05

Loc: Pembroke Pines, Broward County...
Saturn Observation (April 28, 2011)
      #4583831 - 05/15/11 07:40 PM Attachment (56 downloads)

I am able to catch up on recent observations of Saturn. I recently obtained Astro-Tech Paradigm 8mm and 12mm Dual ED eyepieces (during the NEAF Sale Event) as this design presented promising characteristics useful for the study of the Moon and planets (as well as deep sky objects). An educated consumer (including amateur astronomers) must always beware of advertising that claims a new product to be better, or at least equal to, classic designs used in the study of the Moon and planets. Astronomics (our respected sponsor) was claiming that this new design (employing a six element/four group optical layout with two separate ED (Extra-low Dispersion) glass elements of different glass types, 13-15mm eye relief, and a 60-degree field of view) provided high contrast and excellent color fidelity. I have to state from using this new design that these claims are true! I have used many excellent eyepiece designs over forty years in observing the Moon and planets but the AT Paradigm Dual ED is among the best that I have ever used. Saturn appeared sharp and exhibited excellent contrast (showing faint detail within the globe and rings) and color fidelity in the eyepiece field. The AT Paradigm Dual ED will now become my preferred eyepiece design for studying the Moon and planets. I will soon post another observation and images made using this outstanding design.

Date (U.T.): April 28, 2011
Time (U.T.): 02:00
L1 212.9*, L2 105.9*, L3 92.6*
De 7.9*, Ds 9.1*, 0.5m, 19.0" (Equatorial)
Instrument: 9-inch (23-cm) F/13.5 Maksutov-Cassegrain
Magnification: 155x, 258x, and 388x
Filters: None (IL)
Seeing (1-10): 7, Antoniadi (I-V): II
Transparency (1-6): 5

Notes:
North Polar Region (NPR): The northern limb (pole) exhibits a dark (3/10) elliptical center. The region appears dusky to shaded (4-6/10) and mottled (greenish-brown). A dark (3/10) ring surrounds the northern limb.
North Temperate Belt (NTB): Appears dark to dusky (3-4/10) and irregular. It appears to contain thin and bright (7/10) streaks (sections0 within it.
North Tropical Zone (NTrZ): Appears to contain bright (7/10) sections with dark to dusky (3-4/10) diagonal columns across it connecting to the NTB to the NEB. The bright sections represent the remnants of the NTrZ storm.
North Equatorial Belt (NEB): Appears broad and dark to dusky (3-4/10). The northern and southern borders appear irregular.
Equatorial Zone (EZ): Appears shaded to bright (6-7/10), but no other detail is noted within.
Shadow of Ring on the Globe: Appears very to extremely dark (2/10) and diffuse.
South Equatorial Belt (SEB): Appears dark to dusky (3-4/10) and thin.
South Polar Region (SPR): Appears dusky to dull (4-5/10) and mottled (greenish-brown).

Ring A: The outer half of the ring appears dusky (4/10) and a pastel reddish-brown color. The inner half appears shaded (6/10) and light pastel yellow-orange color.
Ring B: The outer half appears bright (7/10) and the inner half contains dusky to dull (4-5/10) streaks.
Ring C (Crepe): Appears dusky (4/10) and translucent.

Mimas (13.46m) appears south-following the planet.

A digital image produced in Pixelmator.

Carlos E. Hernandez


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CarlosEH
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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4583837 - 05/15/11 07:46 PM Attachment (38 downloads)

A wide field (155x) observation of Saturn and three of it's satellites. Mimas (13.46m) was visible for most of the observing session. Rhea (10.17m) and Titan (8.84m) were also visible following the planet.

A digital image produced in Pixelmator.

Carlos


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CarlosEH
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Reged: 01/19/05

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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4583874 - 05/15/11 08:18 PM Attachment (31 downloads)

A sectional sketch of the northern hemisphere of Saturn. The northern limb (pole) exhibits a dark (3/10) elliptical center. The region appears dusky to shaded (4-6/10) and mottled (greenish-brown). A dark (3/10) ring surrounds the northern limb. The North Tropical Zone (NTrZ) storm is still visible containing bright (7/10) sections with dark to dusky (3-4/10) columns across it appearing to connect the NTB and the NEB. The North Equatorial Belt (NEB) appears broad and dark to dusky (3-4/10) with irregular northern and southern border. The Equatorial Zone (EZ) appears shaded to bright (6-7/10), but no other detail is noted within.

A digital image produced in Pixelmator.

Carlos


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Sol Robbins
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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4583894 - 05/15/11 08:29 PM

Excellent!

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cildarithModerator
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Reged: 08/26/04

Loc: San Diego, CA
Re: Saturn Observation (April 28, 2011) new [Re: Sol Robbins]
      #4584124 - 05/15/11 10:35 PM

A beautiful sketch of Saturn, Carlos! The detail in the northern hemisphere and the delicate shading of the ring system stand out in this observation.

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Uwe Pilz
scholastic sledgehammer


Reged: 05/16/08

Loc: Leipzig, Germany
Re: Saturn Observation (April 28, 2011) new [Re: cildarith]
      #4584348 - 05/16/11 01:35 AM

I always enjoy your sketches beeing a little envious about your good seeing.

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ErixAdministrator
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Reged: 12/25/04

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Re: Saturn Observation (April 28, 2011) new [Re: Uwe Pilz]
      #4584527 - 05/16/11 07:43 AM

Excellent series, Carlos, and very detailed report. Thanks for posting. Have you considered doing a review for CN of the new eyepieces? it would be a welcomed addition to the review section!

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niteskystargazer
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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4584574 - 05/16/11 08:30 AM

Carlos,

Very Nice sketch of Saturn .

CS,KLU,

,

Tom


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn Observation (April 28, 2011) new [Re: niteskystargazer]
      #4584687 - 05/16/11 09:56 AM

Carlos, always great to see your sketches. This one is no exception!

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frank5817
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Re: Saturn Observation (April 28, 2011) new [Re: Jef De Wit]
      #4584972 - 05/16/11 12:28 PM

Hello Carlos,

Always so impressive to see what you see at the eyepieces. Fantastic detail and a wonderful, clear report.
The new eyepieces must be a joy.

Frank


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chrisrnuttall
Professor Emeritus


Reged: 12/29/10

Loc: York, England
Re: Saturn Observation (April 28, 2011) new [Re: frank5817]
      #4585171 - 05/16/11 02:07 PM

Carlos
Lovely image

I like the colour of the NEB against the planet as a whole, it's really pleasing on the eye. I guess that's another area where digital sketching lets you get it spot on.



by the way - you forgot the planets shadow on the rings (sorry!)


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CarlosEH
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Re: Saturn Observation (April 28, 2011) new [Re: frank5817]
      #4585179 - 05/16/11 02:12 PM

Thank you all for the kind compliments on my latest Saturn observation. I was fortunate to have enjoyed good seeing conditions for evaluating the new AT Paradigm Dual ED eyepiece. It was a treat to be able to detect so much detail over the globe and rings.

Erika- I am considering doing a review for Cloudy Nights on the AT Paradigm Dual ED. This design is worthy of a review.

Carlos


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Kris.
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Reged: 09/16/04

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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4585388 - 05/16/11 04:30 PM

lovely sketches Carlos, the detail you and many others here can spot in the Saturnian belts is amazing imo!

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CarlosEH
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Re: Saturn Observation (April 28, 2011) new [Re: Kris.]
      #4586240 - 05/17/11 04:38 AM

Kris,

Thank you for the compliment on my Saturn observation. It has been a very exciting apparition with lots of detail to see over the northern hemisphere, especially the NTrZ storm. Your Saturn observations have been very impressive as well. The best of luck in your future observations.

Carlos


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Paul G. Abel
sage


Reged: 01/28/10

Loc: UK
Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4588224 - 05/18/11 08:37 AM

Another splendid result Carlos!!

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voyager75
member


Reged: 08/26/09

Loc: Naples, Italy
Re: Saturn Observation (April 28, 2011) new [Re: Paul G. Abel]
      #4588250 - 05/18/11 08:54 AM

very good Carlos!

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CarlosEH
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Re: Saturn Observation (April 28, 2011) new [Re: voyager75]
      #4589231 - 05/18/11 06:34 PM

Paul and V75,

Thank you both for the kind compliments on my latest Saturn observations. I was impressed with the amount of detail visible over the globe and rings. I look forward to reviewing your excellent observations in the future as well.

Carlos


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Tommy5
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Reged: 03/28/04

Loc: Chicagoland
Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4589412 - 05/18/11 08:11 PM

Another outstanding Saturn sketch congrats.

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CarlosEH
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Re: Saturn Observation (April 28, 2011) new [Re: Tommy5]
      #4590728 - 05/19/11 01:55 PM

Tommy,

Thank you for the compliment on my Saturn observation. The best of luck in your own observations of Saturn and other objects.

Carlos


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rolandlinda3
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Re: Saturn Observation (April 28, 2011) new [Re: CarlosEH]
      #4591736 - 05/19/11 11:43 PM

Carlos, that is one fine series. I will take your sketches before a picture any day.

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