How long to image the Southern Pinwheel with the Vaonis Vespera Pro 2
From a Bortle 6 suburban sky, the Vaonis Vespera Pro 2 needs about 1 h 40 min (598 subs of 10 s) for a solid image of the Southern Pinwheel. A quick look takes 25 min; a showpiece 6 h 38 min. Under a Bortle 3 rural sky the solid figure drops to 44 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 | 10 min59 subs | 39 min233 subs | 2 h 35 min932 subs |
| Bortle 2Typical dark site | 10 min62 subs | 41 min245 subs | 2 h 43 min977 subs |
| Bortle 3Rural | 11 min67 subs | 44 min266 subs | 2 h 57 min1,061 subs |
| Bortle 4Rural / suburban transition | 13 min80 subs | 53 min317 subs | 3 h 31 min1,266 subs |
| Bortle 5Suburban | 17 min100 subs | 1 h 06 min398 subs | 4 h 25 min1,592 subs |
| Bortle 6Bright suburban | 25 min150 subs | 1 h 40 min598 subs | 6 h 38 min2,389 subs |
| Bortle 7Suburban / urban transition | 41 min245 subs | 2 h 43 min978 subs | 11 h3,909 subs |
| Bortle 8City | 1 h 05 min392 subs | 4 h 21 min1,568 subs | 17 h6,269 subs |
| Bortle 9Inner city | 1 h 58 min707 subs | 7 h 51 min2,826 subs | 31 h11,302 subs |
Power and kit for this session
Allowing for slewing, focusing and rejected subs, that is about 2 h 09 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 Southern Pinwheel is 13′ × 12′ 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 | 44 min266 subs | 1 h 06 min398 subs | 2 h 43 min978 subs |
| 20 s | 38 min113 subs | 1 h179 subs | 2 h 36 min469 subs |
| 30 s | 35 min71 subs | 57 min115 subs | 2 h 34 min308 subs |
About the Southern Pinwheel
A bright barred spiral, superb from the southern hemisphere and a low-altitude struggle from northern Europe.
M83, NGC 5236 · Galaxy in Hydra · magnitude 7.6 · 13′ × 12′ · best in Mar, Apr, May. 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 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 Southern Pinwheel 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
- Southern Pinwheel with the ZWO Seestar S50: 47 min from Bortle 6
- Southern Pinwheel with the ZWO Seestar S50 Pro: 51 min from Bortle 6
- Southern Pinwheel with the ZWO Seestar S30: 49 min from Bortle 6
- Southern Pinwheel with the ZWO Seestar S30 Pro: 54 min from Bortle 6
- Southern Pinwheel with the DwarfLab DWARF 3: 1 h 08 min from Bortle 6
- Southern Pinwheel with the DwarfLab DWARF mini: 47 min from Bortle 6
- Southern Pinwheel with the DwarfLab Draco: 38 min from Bortle 6
- Southern Pinwheel with the DwarfLab DWARF II: 2 h 39 min from Bortle 6
- Southern Pinwheel with the Vaonis Vespera II: 47 min from Bortle 6
- Southern Pinwheel with the Vaonis Vespera Pro: 1 h 44 min from Bortle 6
- Southern Pinwheel with the Vaonis Vespera 3: 45 min from Bortle 6
- Southern Pinwheel with the Unistellar eQuinox 2: 42 min from Bortle 6
- Southern Pinwheel with the Unistellar Odyssey: 3 h 12 min from Bortle 6
- Southern Pinwheel with the Celestron Origin: 12 min from Bortle 6
- Southern Pinwheel with the Celestron Origin Mark II: 17 min from Bortle 6
All telescopes for the Southern Pinwheel · All targets for the Vespera Pro 2