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

About 13 min of total integration for a solid image, or 50 min for a showpiece. A quick look takes 3 min.

How many subs is that on the Origin?

At the default 10 s sub length, 76 subs for a solid image from Bortle 6 and 30 from Bortle 3.

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

Yes. It is an emission-line object; from Bortle 6 the filter cuts the solid-image time from 13 min to 7 min.

How long to image the Tarantula Nebula with the Celestron Origin

From a Bortle 6 suburban sky, the Celestron Origin needs about 13 min (76 subs of 10 s) for a solid image of the Tarantula Nebula. A quick look takes 3 min; a showpiece 50 min. Under a Bortle 3 rural sky the solid figure drops to 5 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 78% of the frame’s short side.

Tarantula 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 min10 subs	5 min30 subs	15 min92 subs
Bortle 2Typical dark site	2 min10 subs	5 min30 subs	16 min99 subs
Bortle 3Rural	2 min10 subs	5 min30 subs	18 min111 subs
Bortle 4Rural / suburban transition	2 min10 subs	6 min35 subs	23 min140 subs
Bortle 5Suburban	2 min12 subs	8 min47 subs	31 min187 subs
Bortle 6Bright suburban	3 min19 subs	13 min76 subs	50 min301 subs
Bortle 7Suburban / urban transition	5 min33 subs	22 min130 subs	1 h 26 min519 subs
Bortle 8City	9 min54 subs	36 min215 subs	2 h 23 min857 subs
Bortle 9Inner city	16 min99 subs	1 h 06 min395 subs	4 h 23 min1,579 subs

Adjust in the calculator

Power and kit for this session

Allowing for slewing, focusing and rejected subs, that is about 16 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, and 30% off the battery for a December night.)

portable power station 300W AC outletRuns the supplied 12 V adapter in the field; the dew shield and heater are already built in.
Amazon UK Amazon US Jackery UK
red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
Amazon UK Amazon US
hand warmers long lastingAir-activated packs give hours of heat for the person; winter nights are long and you spend most of them standing still.
Amazon UK Amazon US

Affiliate links: the retailer pays us a small commission and you pay the same price. These are search links to the named product, not endorsements of a particular listing; check the listing matches your model.

Everything that fits the Origin →

How it frames

The Tarantula Nebula is 40′ × 25′ across. The Origin frames 1.27° × 0.85° at 1.48″ per pixel, so it fills 78% 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	5 min30 subs	8 min47 subs	22 min130 subs
15 s	8 min30 subs	8 min30 subs	21 min86 subs
30 s	15 min30 subs	15 min30 subs	21 min43 subs

With and without the dual-band filter

Solid quality, default sub length.
Filter	Bortle 3	Bortle 5	Bortle 7
No filter	5 min30 subs	8 min47 subs	22 min130 subs
dual-band (Nebula Filter), drawer	5 min30 subs	6 min35 subs	10 min60 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 Tarantula Nebula

The giant star-forming region in the Large Magellanic Cloud, bright enough to see naked-eye from another galaxy. Far south only.

NGC 2070, Caldwell 103, 30 Doradus · Emission nebula in Dorado · magnitude 8.0 · 40′ × 25′ · best in Nov, Dec, Jan. Southern hemisphere only.

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.

Where to buy the OriginAmazon UK Amazon USAffiliate links: As an Amazon Associate I earn from qualifying purchases, at no cost to you.

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

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