Object of the Week November 4th, 2018 – NGC 1535 Cleopatras Eye

[Dragan]

NGC 1535

PK 206-40 1


Planetary Nebula


Eridanus


RA 04 14 15.8
DEC -12 44 22


Mag: 9.4


CS Mag: 12.2


Size: 20”

Discovered by William Herschel on February 1st, 1785 and noted as being a remarkable object even by his standards, NGC 1535 is very reminiscent of our beloved Eskimo Nebula. Located approximately 6000ly towards Eridanus, NGC 1535 can be spotted in all manner of scopes.


Similar in shape and color, NGC 1535 is a beautiful blueish well-defined ball that takes magnification very well. Although it’ll appear stellar in small scopes, higher power in larger scopes show an oval inner ring that lends itself to the objects namesake. Mottling can be seen towards the center, inner shell while the outer shell tends to be a bit less detailed. Both shells of this planetary are readily visible.


If you have the skies and equipment, crank up the power. Much like other bright nebulae, this object responds will to magnification.


And as always,
Give it a go and let us know!

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Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona

[Raul Leon]

Hi ,
Here's my observation from 2017: bright planetary with fairly bright central star, slightly green color observed, dim star in outer halo observed on nights of good seeing, I used a 4.5 Delos at 352x magnification with my 14.5 Starstructure Dob f/4.3 3248

[Bertrand Laville]

Hi All,

Great choice, and great PN.
Here is what I 've seen with a 25" Dobson Obsession, Southern Alps, SQM 21.4, NLEM 6.4, good seeing.

X520 Ethos 6mm without filter

This is the best G, the NP can be analyzed. She is beautiful, with deep colors, but not completely saturated.
The halo is L5 (on a scale of brightness from 0 none to 9 brightest), color C120 / S40, the ring is L7, C120 / S60. Moreover, and this is very clear, the outer edge of the ring is very sharp, on the L5-L7 halo, while its internal limit weakens progressively, L3 to L1. The halo and the ring are not exactly round but a / b ~ 1.10, in the AP 60 °.

CS * is almost a lighthouse, C120, m12-13v. The star in the halo is easy (although this was not the case at LX254), although significantly lower than CS *. It is C120.
NGC 1535 is a beautiful PN, bright, colorful, slightly blue green, with a double halo; it is part of beautiful NP, not all best but close.
For more details: http://www.deepsky-drawings.com/ngc-1535/dsdlang/fr

Clear skies
Bertrand
http://www.deepsky-drawings.com

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[Howard B]

Hi have two sketches of 1535, the first is the view through my 28-inch in 2008:

"It's been awhile since I've had a look at this little brother to the Eskimo. It has a gorgeous blue color at 105x but the detail shown in the sketch is seen at 408x. The blue color is dimmed but still evident at high power - a great sight. 21.95 SQM"

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Then in 2013 I was treated to a view through Jimi's 48-inch:

"Beautiful view all the way to 1200x - terrific! The bright inner annulus is roughly shaped like a rugby ball with its inner perimeter showing some inward spikes pointing toward the center. I didn't see any radial lines in the larger, fainter circular glow. No color seen, but at the high powers we're using that's no surprise. 21.40 SQM"

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[Uwe Glahn]

Just visited NGC 1535 with my 4-inch binocular last days. Nice little disk with a central stellar peak. I guess the spot was the brighter middle part and not the CS.

With 8-inch the CS was finally visible. The inner part could be separated from the fainter outer disk.

With 16-inch under very good transparency and seeing I could detect the first sights of the irregular inner disk but could not hold any detail steadily.

With 27-inch finally I could pick up four bridges from the CS due to the inner disk.

sketch: 27", 837x, no filter, NELM 7m0+, Seeing I
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