How long to image the M10 with the Vaonis Vespera Pro
From a Bortle 6 suburban sky, the Vaonis Vespera Pro needs about 1 h 01 min (367 subs of 10 s) for a solid image of the M10. A quick look takes 15 min; a showpiece 4 h 05 min. Under a Bortle 3 rural sky the solid figure drops to 28 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 21% 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 | 6 min38 subs | 25 min151 subs | 1 h 40 min603 subs |
| Bortle 2Typical dark site | 7 min40 subs | 26 min158 subs | 1 h 45 min630 subs |
| Bortle 3Rural | 7 min43 subs | 28 min170 subs | 1 h 53 min680 subs |
| Bortle 4Rural / suburban transition | 8 min51 subs | 33 min201 subs | 2 h 14 min802 subs |
| Bortle 5Suburban | 10 min63 subs | 41 min249 subs | 2 h 46 min995 subs |
| Bortle 6Bright suburban | 15 min92 subs | 1 h 01 min367 subs | 4 h 05 min1,468 subs |
| Bortle 7Suburban / urban transition | 25 min149 subs | 1 h 39 min593 subs | 6 h 35 min2,370 subs |
| Bortle 8City | 39 min236 subs | 2 h 37 min943 subs | 10 h3,770 subs |
| Bortle 9Inner city | 1 h 10 min423 subs | 4 h 41 min1,689 subs | 19 h6,756 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 19 min of run time. The Vespera Pro’s battery (rated about 11 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.)
- USB-C PD power bank 20000mAh 30WExtends the 11 h battery; 30 W PD per Vaonis.
- red LED head torchRed light keeps your night vision; white light costs you twenty minutes of dark adaptation every time.
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Everything that fits the Vespera Pro →
How it frames
The M10 is 20′ across. The Vespera Pro frames 1.62° × 1.62° at 1.65″ per pixel, so it fills 21% of the frame’s short side.
Longer subs
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only, no EQ mode. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 28 min170 subs | 41 min249 subs | 1 h 39 min593 subs |
| 20 s | 24 min73 subs | 37 min112 subs | 1 h 35 min284 subs |
| 30 s | 23 min46 subs | 36 min72 subs | 1 h 33 min187 subs |
About the M10
A bright globular in Ophiuchus, three degrees from its twin M12. Both fit a short session.
NGC 6254 · Globular cluster in Ophiuchus · magnitude 6.6 · 20′ · best in May, Jun, Jul. Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
Globular clusters are point sources packed tight, so they come quickly: the core resolves into stars within a handful of minutes on any smart scope. More time deepens the halo and pulls in the faint outer members. Use short subs so the core does not saturate into a white blob, and no filter.
About the Vaonis Vespera Pro
The square-sensor Vespera with 2 µm pixels. Higher resolution than the II, and correspondingly slower per pixel: expect around double the time for the same per-pixel SNR. Run-out in 2026 and replaced by the Vespera Pro 2.
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only, no EQ mode. Optional clip-on Vaonis filters: dual-band, light-pollution (CLS) and solar.
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 M10 from a Vespera Pro? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- M10 with the ZWO Seestar S50: 27 min from Bortle 6
- M10 with the ZWO Seestar S50 Pro: 30 min from Bortle 6
- M10 with the ZWO Seestar S30: 29 min from Bortle 6
- M10 with the ZWO Seestar S30 Pro: 32 min from Bortle 6
- M10 with the DwarfLab DWARF 3: 40 min from Bortle 6
- M10 with the DwarfLab DWARF mini: 27 min from Bortle 6
- M10 with the DwarfLab Draco: 23 min from Bortle 6
- M10 with the DwarfLab DWARF II: 1 h 33 min from Bortle 6
- M10 with the Vaonis Vespera II: 27 min from Bortle 6
- M10 with the Vaonis Vespera 3: 26 min from Bortle 6
- M10 with the Vaonis Vespera Pro 2: 58 min from Bortle 6
- M10 with the Unistellar eQuinox 2: 24 min from Bortle 6
- M10 with the Unistellar Odyssey: 1 h 51 min from Bortle 6
- M10 with the Celestron Origin: 7 min from Bortle 6
- M10 with the Celestron Origin Mark II: 10 min from Bortle 6
All telescopes for the M10 · All targets for the Vespera Pro