How long to image the M110 with the Celestron Origin Mark II
From a Bortle 6 suburban sky, the Celestron Origin Mark II needs about 1 h 22 min (491 subs of 10 s) for a solid image of the M110. A quick look takes 20 min; a showpiece 5 h 27 min. Under a Bortle 3 rural sky the solid figure drops to 23 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.
| Sky | Quick lookTarget obvious, still noisy | SolidClean enough to share | ShowpieceSmooth faint detail, print-worthy |
|---|---|---|---|
| Bortle 1Excellent dark site | 4 min27 subs | 17 min105 subs | 1 h 10 min420 subs |
| Bortle 2Typical dark site | 5 min30 subs | 19 min117 subs | 1 h 18 min467 subs |
| Bortle 3Rural | 6 min35 subs | 23 min140 subs | 1 h 33 min557 subs |
| Bortle 4Rural / suburban transition | 8 min49 subs | 32 min194 subs | 2 h 09 min774 subs |
| Bortle 5Suburban | 12 min70 subs | 47 min280 subs | 3 h 06 min1,119 subs |
| Bortle 6Bright suburban | 20 min123 subs | 1 h 22 min491 subs | 5 h 27 min1,964 subs |
| Bortle 7Suburban / urban transition | 37 min224 subs | 2 h 29 min894 subs | 9 h 56 min3,575 subs |
| Bortle 8City | 1 h 03 min380 subs | 4 h 13 min1,519 subs | 17 h6,076 subs |
| Bortle 9Inner city | 1 h 59 min714 subs | 7 h 55 min2,853 subs | 32 h11,411 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 46 min of run time. The Origin Mark II’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.)
- portable power station 300W AC outletRuns the supplied 12 V adapter off-grid; dew shield and heater are built in.
- red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
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 Mark II →
How it frames
The M110 is 22′ × 11′ across. The Origin Mark II frames 1.32° × 0.75° at 1.23″ 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. Celestron warns the f/2.2 optics saturate quickly without the filter. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 23 min140 subs | 47 min280 subs | 2 h 29 min894 subs |
| 15 s | 23 min91 subs | 46 min185 subs | 2 h 28 min594 subs |
| 30 s | 22 min45 subs | 46 min92 subs | 2 h 28 min296 subs |
About the M110
Andromeda's larger, diffuse elliptical companion. Low surface brightness; it fades into the background in short stacks.
NGC 205 · Galaxy in Andromeda · magnitude 8.1 · 22′ × 11′ · best in Sep, Oct, Nov. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
Galaxies are broadband targets: their light is mostly starlight spread across the spectrum, so a dual-band filter throws most of it away and makes things slower, not faster. Shoot without a filter (or with a plain UV/IR cut) and rely on total time and a dark sky. The core of a galaxy is usually many times brighter than its outer disc, so a short stack shows the nucleus long before the arms; the figures here are for the arms and disc, not the core.
Field rotation in Alt-Az mode crops the edges of the stack over a long session, so on a big galaxy re-centre now and then or use EQ mode where your scope supports it.
About the Celestron Origin Mark II
The Origin Mark II (late 2025): the same 6-inch f/2.2 RASA with an 8 MP IMX678 in place of the original 6 MP IMX178. Smaller pixels for finer detail, a quieter sensor, and still the fastest system here by a wide margin.
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. Celestron warns the f/2.2 optics saturate quickly without the filter. 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.
Have an image of the M110 from a Origin Mark II? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- M110 with the ZWO Seestar S50: 3 h 46 min from Bortle 6
- M110 with the ZWO Seestar S50 Pro: 4 h 08 min from Bortle 6
- M110 with the ZWO Seestar S30: 3 h 58 min from Bortle 6
- M110 with the ZWO Seestar S30 Pro: 4 h 23 min from Bortle 6
- M110 with the DwarfLab DWARF 3: 5 h 28 min from Bortle 6
- M110 with the DwarfLab DWARF mini: 3 h 45 min from Bortle 6
- M110 with the DwarfLab Draco: 3 h 06 min from Bortle 6
- M110 with the DwarfLab DWARF II: 13 h from Bortle 6
- M110 with the Vaonis Vespera II: 3 h 46 min from Bortle 6
- M110 with the Vaonis Vespera Pro: 8 h 28 min from Bortle 6
- M110 with the Vaonis Vespera 3: 3 h 36 min from Bortle 6
- M110 with the Vaonis Vespera Pro 2: 8 h 04 min from Bortle 6
- M110 with the Unistellar eQuinox 2: 3 h 28 min from Bortle 6
- M110 with the Unistellar Odyssey: 16 h from Bortle 6
- M110 with the Celestron Origin: 1 h from Bortle 6
All telescopes for the M110 · All targets for the Origin Mark II