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

About 51 min of total integration for a solid image, or 3 h 24 min for a showpiece. A quick look takes 13 min.

How many subs is that on the Origin?

At the default 10 s sub length, 307 subs for a solid image from Bortle 6 and 99 from Bortle 3.

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

Yes. It is an emission-line object; from Bortle 6 the filter cuts the solid-image time from 51 min to 26 min.

How long to image the Helix Nebula with the Celestron Origin

From a Bortle 6 suburban sky, the Celestron Origin needs about 51 min (307 subs of 10 s) for a solid image of the Helix Nebula. A quick look takes 13 min; a showpiece 3 h 24 min. Under a Bortle 3 rural sky the solid figure drops to 16 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 49% of the frame’s short side.

Helix 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	3 min20 subs	13 min79 subs	52 min314 subs
Bortle 2Typical dark site	4 min22 subs	14 min86 subs	57 min342 subs
Bortle 3Rural	4 min25 subs	16 min99 subs	1 h 06 min395 subs
Bortle 4Rural / suburban transition	5 min33 subs	22 min131 subs	1 h 27 min523 subs
Bortle 5Suburban	8 min46 subs	30 min182 subs	2 h 01 min727 subs
Bortle 6Bright suburban	13 min77 subs	51 min307 subs	3 h 24 min1,226 subs
Bortle 7Suburban / urban transition	23 min137 subs	1 h 31 min545 subs	6 h 03 min2,177 subs
Bortle 8City	38 min229 subs	2 h 32 min914 subs	10 h3,654 subs
Bortle 9Inner city	1 h 11 min426 subs	4 h 43 min1,701 subs	19 h6,804 subs

Adjust in the calculator

Power and kit for this session

Allowing for slewing, focusing and rejected subs, that is about 1 h 06 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 Helix Nebula is 25′ × 22′ across. The Origin frames 1.27° × 0.85° at 1.48″ per pixel, so it fills 49% 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	16 min99 subs	30 min182 subs	1 h 31 min545 subs
15 s	15 min61 subs	29 min117 subs	1 h 29 min358 subs
30 s	15 min30 subs	28 min56 subs	1 h 28 min177 subs

With and without the dual-band filter

Solid quality, default sub length.
Filter	Bortle 3	Bortle 5	Bortle 7
No filter	16 min99 subs	30 min182 subs	1 h 31 min545 subs
dual-band (Nebula Filter), drawer	16 min94 subs	20 min120 subs	38 min231 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 Helix Nebula

The nearest bright planetary nebula, half the Moon's width but spread thin. Low from the UK; dual-band and a couple of hours make the eye appear.

NGC 7293, Caldwell 63 · Planetary nebula in Aquarius · magnitude 7.3 · 25′ × 22′ · best in Aug, Sep, Oct. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.

Planetary nebulae are small but intensely bright per pixel in OIII and H-alpha, so they respond very well to a dual-band filter and do not need much time for the main shell. The faint outer halos most of them have are a different proposition and need hours. Keep subs short if the central region saturates.

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

Have an image of the Helix 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 Helix Nebula · All targets for the Origin