How long should I image the Eagle Nebula with the Origin from a Bortle 6 sky?

About 25 min of total integration for a solid image, or 1 h 41 min for a showpiece. A quick look takes 6 min.

How many subs is that on the Origin?

At the default 10 s sub length, 151 subs for a solid image from Bortle 6 and 52 from Bortle 3.

Does a dual-band filter help on the Eagle Nebula?

Yes. It is an emission-line object; from Bortle 6 the filter cuts the solid-image time from 25 min to 14 min.

How long to image the Eagle Nebula with the Celestron Origin

From a Bortle 6 suburban sky, the Celestron Origin needs about 25 min (151 subs of 10 s) for a solid image of the Eagle Nebula. A quick look takes 6 min; a showpiece 1 h 41 min. Under a Bortle 3 rural sky the solid figure drops to 9 min. At Bortle 6 the limit is skyglow, so a darker site or a filter helps more than longer subs. In this scope's field it fills 68% of the frame’s short side.

Eagle Nebula with the Celestron Origin: 10 s subs.
Sky	Quick lookTarget obvious, still noisy	SolidClean enough to share	ShowpieceSmooth faint detail, print-worthy
Bortle 1Excellent dark site	2 min11 subs	7 min42 subs	28 min168 subs
Bortle 2Typical dark site	2 min12 subs	8 min46 subs	30 min181 subs
Bortle 3Rural	2 min13 subs	9 min52 subs	34 min206 subs
Bortle 4Rural / suburban transition	3 min17 subs	11 min67 subs	45 min268 subs
Bortle 5Suburban	4 min23 subs	15 min92 subs	1 h 01 min365 subs
Bortle 6Bright suburban	6 min38 subs	25 min151 subs	1 h 41 min604 subs
Bortle 7Suburban / urban transition	11 min67 subs	44 min265 subs	2 h 56 min1,059 subs
Bortle 8City	18 min111 subs	1 h 14 min442 subs	4 h 54 min1,766 subs
Bortle 9Inner city	34 min205 subs	2 h 16 min819 subs	9 h 06 min3,274 subs

Adjust in the calculator

Power and kit for this session

Allowing for slewing, focusing and rejected subs, that is about 33 min of run time. The Origin’s battery (rated about 6 h) should cover it; a power bank still keeps the phone running the app alive. (Bortle 6, solid image; we allow 30% over the integration time.)

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How it frames

The Eagle Nebula is 35′ × 28′ across. The Origin frames 1.27° × 0.85° at 1.48″ per pixel, so it fills 68% of the frame’s short side.

Longer subs

10 s auto subs (15 s with the Nebula Filter); manual 1 to 30 s on the alt-az mount, longer only with the EQ wedge, and 60 s and up needs the StarSense Autoguider too. Time for a solid image by sub length:

Sub length	Bortle 3	Bortle 5	Bortle 7
10 s	9 min52 subs	15 min92 subs	44 min265 subs
15 s	8 min33 subs	15 min59 subs	44 min175 subs
30 s	15 min30 subs	15 min30 subs	43 min86 subs

With and without the dual-band filter

Solid quality, default sub length.
Filter	Bortle 3	Bortle 5	Bortle 7
No filter	9 min52 subs	15 min92 subs	44 min265 subs
dual-band (Nebula Filter), drawer	8 min51 subs	11 min64 subs	19 min117 subs

The Origin has no built-in dual-band filter. Filter drawer takes 1.25-inch or 2-inch filters, including dual-band; Celestron sells an optional Nebula Filter. On an emission target like this it is the single biggest upgrade you can make.

About the Eagle Nebula

Home of the Pillars of Creation. The cluster comes fast; the pillars and surrounding nebulosity need a dual-band filter and patience.

M16, NGC 6611, IC 4703 · Emission nebula in Serpens · magnitude 6.0 · 35′ × 28′ · best in Jun, Jul, Aug. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.

Emission nebulae glow in a few narrow lines, mostly hydrogen-alpha (deep red) and doubly ionised oxygen (teal). A dual-band filter passes those lines and blocks most skyglow, which is why it cuts the time needed from a suburban sky so dramatically. Use it. From a genuinely dark site the gain is smaller because there is less skyglow to block, and read noise becomes the limit, which is where longer subs (EQ mode, or Expert Mode on a Vespera) earn their keep.

Stars lose colour through a dual-band filter; a short broadband stack blended in fixes that if you care.

About the Celestron Origin

The first-generation Origin: a 6-inch f/2.2 RASA in a smart package and the fastest system here by a wide margin. Superseded by the Mark II in late 2025 and no longer sold new; Celestron offers a camera upgrade to the Mark II sensor.

10 s auto subs (15 s with the Nebula Filter); manual 1 to 30 s on the alt-az mount, longer only with the EQ wedge, and 60 s and up needs the StarSense Autoguider too. Filter drawer takes 1.25-inch or 2-inch filters, including dual-band; Celestron sells an optional Nebula Filter.

Longer subs matter most under dark skies, where read noise rather than skyglow sets the floor. From a city the difference between 10 s and 30 s subs is small; from a rural site it can halve the total time, especially with a dual-band filter in place.

Stack across nights. Every smart scope app can continue a stack or you can combine the saved frames on a computer; the figures here are totals, not single-session limits.

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Imaged the Eagle Nebula with your Origin? Did the solid figure match?Anonymous, one tap. It is how the model gets calibrated.

Have an image of the Eagle Nebula from a Origin? Email it with your total time and sky to [email protected] and it goes here, credited.

Same target, other telescopes

All telescopes for the Eagle Nebula · All targets for the Origin