How long to image the M53 with the Vaonis Vespera Pro
From a Bortle 6 suburban sky, the Vaonis Vespera Pro needs about 1 h 19 min (473 subs of 10 s) for a solid image of the M53. A quick look takes 20 min; a showpiece 5 h 15 min. Under a Bortle 3 rural sky the solid figure drops to 36 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 13% 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 | 8 min48 subs | 32 min192 subs | 2 h 08 min768 subs |
| Bortle 2Typical dark site | 8 min51 subs | 33 min201 subs | 2 h 14 min803 subs |
| Bortle 3Rural | 9 min55 subs | 36 min217 subs | 2 h 25 min868 subs |
| Bortle 4Rural / suburban transition | 11 min65 subs | 43 min257 subs | 2 h 51 min1,026 subs |
| Bortle 5Suburban | 13 min80 subs | 53 min320 subs | 3 h 33 min1,277 subs |
| Bortle 6Bright suburban | 20 min119 subs | 1 h 19 min473 subs | 5 h 15 min1,892 subs |
| Bortle 7Suburban / urban transition | 32 min192 subs | 2 h 08 min766 subs | 8 h 31 min3,064 subs |
| Bortle 8City | 51 min306 subs | 3 h 23 min1,221 subs | 14 h4,883 subs |
| Bortle 9Inner city | 1 h 31 min548 subs | 6 h 05 min2,191 subs | 24 h8,764 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 42 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.
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 Vespera Pro →
How it frames
The M53 is 13′ across. The Vespera Pro frames 1.62° × 1.62° at 1.65″ per pixel, so it fills 13% 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 | 36 min217 subs | 53 min320 subs | 2 h 08 min766 subs |
| 20 s | 31 min93 subs | 48 min144 subs | 2 h 02 min367 subs |
| 30 s | 29 min58 subs | 46 min93 subs | 2 h241 subs |
About the M53
A distant globular in Coma Berenices, one of the outer halo clusters. Modest but easy.
NGC 5024 · Globular cluster in Coma Berenices · magnitude 7.6 · 13′ · best in Mar, Apr, May. 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 M53 from a Vespera Pro? Email it with your total time and sky to [email protected] and it goes here, credited.
Same target, other telescopes
- M53 with the ZWO Seestar S50: 35 min from Bortle 6
- M53 with the ZWO Seestar S50 Pro: 39 min from Bortle 6
- M53 with the ZWO Seestar S30: 37 min from Bortle 6
- M53 with the ZWO Seestar S30 Pro: 41 min from Bortle 6
- M53 with the DwarfLab DWARF 3: 52 min from Bortle 6
- M53 with the DwarfLab DWARF mini: 35 min from Bortle 6
- M53 with the DwarfLab Draco: 29 min from Bortle 6
- M53 with the DwarfLab DWARF II: 1 h 59 min from Bortle 6
- M53 with the Vaonis Vespera II: 35 min from Bortle 6
- M53 with the Vaonis Vespera 3: 34 min from Bortle 6
- M53 with the Vaonis Vespera Pro 2: 1 h 15 min from Bortle 6
- M53 with the Unistellar eQuinox 2: 31 min from Bortle 6
- M53 with the Unistellar Odyssey: 2 h 24 min from Bortle 6
- M53 with the Celestron Origin: 9 min from Bortle 6
- M53 with the Celestron Origin Mark II: 13 min from Bortle 6
All telescopes for the M53 · All targets for the Vespera Pro