How long to image the M53 with the Vaonis Vespera Pro 2
From a Bortle 6 suburban sky, the Vaonis Vespera Pro 2 needs about 1 h 15 min (451 subs of 10 s) for a solid image of the M53. A quick look takes 19 min; a showpiece 5 h 01 min. Under a Bortle 3 rural sky the solid figure drops to 34 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 min46 subs | 30 min182 subs | 2 h 01 min725 subs |
| Bortle 2Typical dark site | 8 min48 subs | 32 min190 subs | 2 h 06 min758 subs |
| Bortle 3Rural | 9 min52 subs | 34 min206 subs | 2 h 17 min821 subs |
| Bortle 4Rural / suburban transition | 10 min61 subs | 41 min244 subs | 2 h 42 min973 subs |
| Bortle 5Suburban | 13 min76 subs | 51 min304 subs | 3 h 22 min1,213 subs |
| Bortle 6Bright suburban | 19 min113 subs | 1 h 15 min451 subs | 5 h 01 min1,804 subs |
| Bortle 7Suburban / urban transition | 31 min184 subs | 2 h 02 min733 subs | 8 h 08 min2,930 subs |
| Bortle 8City | 49 min293 subs | 3 h 15 min1,170 subs | 13 h4,677 subs |
| Bortle 9Inner city | 1 h 28 min526 subs | 5 h 50 min2,101 subs | 23 h8,404 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 1 h 38 min of run time. The Vespera Pro 2’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 30WExternal bank extends the 11 h battery.
- 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 2 →
How it frames
The M53 is 13′ across. The Vespera Pro 2 frames 1.65° × 1.65° at 1.68″ 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; CovalENS mosaic gives 3.2° × 3.2° at 50 MP. Time for a solid image by sub length:
| Sub length | Bortle 3 | Bortle 5 | Bortle 7 |
|---|---|---|---|
| 10 s | 34 min206 subs | 51 min304 subs | 2 h 02 min733 subs |
| 20 s | 29 min88 subs | 46 min137 subs | 1 h 57 min352 subs |
| 30 s | 28 min56 subs | 44 min88 subs | 1 h 55 min231 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 2
The square-sensor 2026 Vespera with 2 µm pixels. Sharper than the Vespera 3 on small targets and correspondingly slower per pixel; the 12.5 MP square frame suits galaxies and planetaries.
10 s subs by default; Expert Mode manual targets allow 1 to 30 s. Alt-azimuth only; CovalENS mosaic gives 3.2° × 3.2° at 50 MP. 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 2? 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 Pro: 1 h 19 min from Bortle 6
- M53 with the Vaonis Vespera 3: 34 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 2