M92
NGC 6341 · Globular cluster in Hercules
- Magnitude
- 6.4
- Size
- 14′
- Effective surface brightness
- 20.5 mag/arcsec²
- Best months
- May, Jun, Jul
- Declination
- +43°
- Filter
- None (broadband target)
Hercules' other globular, overshadowed by M13 but nearly as good. Circumpolar from the UK.
Reachable from mid-northern latitudes (UK, northern US, central Europe) and from the south.
How long with each smart telescope
| Telescope | In frame | Bortle 3 (rural) | Bortle 5 (suburban) | Bortle 7 (urban edge) |
|---|---|---|---|---|
| ZWO Seestar S5010 s subs | 33% | 5 min30 subs | 5 min30 subs | 9 min55 subs |
| ZWO Seestar S50 Pro10 s subs | 17% | 5 min30 subs | 5 min30 subs | 10 min60 subs |
| ZWO Seestar S3010 s subs | 20% | 5 min30 subs | 5 min30 subs | 9 min57 subs |
| ZWO Seestar S30 Pro10 s subs | 10% | 5 min30 subs | 5 min30 subs | 11 min64 subs |
| DwarfLab DWARF 315 s subs | 14% | 8 min30 subs | 8 min30 subs | 14 min55 subs |
| DwarfLab DWARF mini15 s subs | 20% | 8 min30 subs | 8 min30 subs | 9 min37 subs |
| DwarfLab Draco30 s subs | 19% | 15 min30 subs | 15 min30 subs | 15 min30 subs |
| DwarfLab DWARF II15 s subs | 13% | 12 min48 subs | 15 min60 subs | 28 min114 subs |
| Vaonis Vespera II10 s subs | 16% | 5 min30 subs | 5 min30 subs | 9 min55 subs |
| Vaonis Vespera Pro10 s subs | 14% | 7 min44 subs | 10 min58 subs | 20 min120 subs |
| Vaonis Vespera 310 s subs | 16% | 5 min30 subs | 5 min30 subs | 9 min53 subs |
| Vaonis Vespera Pro 210 s subs | 14% | 7 min42 subs | 9 min56 subs | 19 min114 subs |
| Unistellar eQuinox 24 s subs | 41% | 3 min50 subs | 4 min60 subs | 7 min105 subs |
| Unistellar Odyssey4 s subs | 42% | 16 min240 subs | 18 min278 subs | 29 min443 subs |
| Celestron Origin10 s subs | 27% | 5 min30 subs | 5 min30 subs | 5 min30 subs |
| Celestron Origin Mark II10 s subs | 31% | 5 min30 subs | 5 min30 subs | 5 min30 subs |
Imaging the globular cluster
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.
Per-telescope pages
- How long to image the M92 with the ZWO Seestar S50
- How long to image the M92 with the ZWO Seestar S50 Pro
- How long to image the M92 with the ZWO Seestar S30
- How long to image the M92 with the ZWO Seestar S30 Pro
- How long to image the M92 with the DwarfLab DWARF 3
- How long to image the M92 with the DwarfLab DWARF mini
- How long to image the M92 with the DwarfLab Draco
- How long to image the M92 with the DwarfLab DWARF II
- How long to image the M92 with the Vaonis Vespera II
- How long to image the M92 with the Vaonis Vespera Pro
- How long to image the M92 with the Vaonis Vespera 3
- How long to image the M92 with the Vaonis Vespera Pro 2
- How long to image the M92 with the Unistellar eQuinox 2
- How long to image the M92 with the Unistellar Odyssey
- How long to image the M92 with the Celestron Origin
- How long to image the M92 with the Celestron Origin Mark II