HCG 37
HCG37 - NGC 2783, IC2449
5’ x 5’ | 0.3”/px | 994 × 994 px
Cancer
RA 09h 13m 35.3s DEC +30° 01’ 25.5”
HCG37 is a compact quintet located in the constellation Cancer. The five galaxies have similar distances to Earth, in the range of approximately 300 million light-years. The brightest galaxy (a) is also known as NGC 2783. It has an angular size of 2.63’ x 1.58’ and an apparent magnitude of 13.9. Perhaps the most striking galaxy is the second brightest (b). An edge-on spiral galaxy with visible dust lane. The bright star at the bottom is TYC1957-223-1, a 9th magnitude star at a distance of 2951 light-years with no relationship to the galaxy group. Details of all five galaxies are listed in the table below.
Hickson classification: EII - Group diameter: 3.2’
Group diameter according to Hickson, horizontal bar is 1 arcmin
| Ltr | Primary Designation | Also Known As | Type | RA (J2000) | Dec (J2000) | Distance (Mly) | Angular Size | App. Mag. (B) |
|---|---|---|---|---|---|---|---|---|
| a | NGC 2783 | UGC 4859 · PGC 26013 | E | 09h 13m 39s | +29° 59′ 35″ | ~322 | 2.63′ × 1.58′ | 13.9 |
| b | UGC 4856 | IC 2449 · PGC 26012 | Sbc | 09h 13m 32s | +30° 00′ 00″ | ~325 | 1.89′ × 0.33′ | 15.2 |
| c | MCG +5-22-020 | PGC 26004 | S0a | 09h 13m 37s | +29° 59′ 58″ | ~350 | 0.44′ × 0.31′ | 16.5 |
| d | MCG +5-22-016 | PGC 26009 | S? | 09h 13m 34s | +30° 00′ 51″ | ~291 | 0.21′ × 0.15′ | 16.4 |
| e | MCG +5-22-018 | PGC 26006 | E-SO | 09h 13m 34s | +30° 02′ 23″ | ~306 | 0.35′ × 0.34′ | 17.0 |
Imaging
Visibility graph at location: Remote hosting facility Roboscopes in Fregenal de la Sierra, Spain (38°N 6°W)
| Telescope | Planewave CDK14 (2563mm @ f/7.2) |
| Mount | 10Micron GM2000HPS |
| Camera | Moravian C3-61000 Pro |
| Filters | Chroma 2" Luminance |
| Software | Voyager, MW4, PixInsight |
| Capture date(s) | 12 and 17 april 2026 |
| Settings | -10°C, gain 0, bin 1 |
| Exposure | 10 × 300s @ Gain 0 (50 min) |
| Filters | Chroma 2" Luminance |
| Processing | WBPP, DBE, BXT, MAS, NXT, invert, crop |