NGC 3532 (Caldwell 91), also commonly known as the Pincushion Cluster, Football Cluster, the Black Arrow Cluster, or the Wishing Well Cluster,is an open cluster in the constellation Carina. Its population of approximately 150 stars of 7th magnitude or fainter includes seven red giants and seven white dwarfs.
| Object | NGC3532 Open Star Cluster |
| Constellation: | Carina |
| Position: | RA 11h 05m 39s Dec -58° 45' 00'' |
| Apparent Size: | 30 arcmins |
| Apparent Magnitude: | |
| Distance in light years: | 1300 ly |
| Photo Data | |
| Date: | 22 Mar 2021 |
| Location: |
El Sauce Observatory Chile (2500m ASL) GPS: 47°36’13“ N, 10°11’24“ E |
| Telescope: | CHI-2-CCD: ASA500N f3.8/1900mm |
| Camera: | FLI PL16803 / 9μm 4096x4096px @ T sensor = -35.0°C |
| Field of View: | 1.1° x 1.1° |
| Pixel Scale/Resolution: | 0.98 arcsec/px |
| Expose frames/times: | L 2x300s, R 2x300s, G 2x300s, B 2x300s |
| Total expose: | 0h 40min |
| Filter: | Astrodon LRGB |
| Mount: | ASA DDM85 equatorial mount with direct drives |
| Software: | Siril 1.4, Photoshop CC |
| Remarks: |
© 2025 Peter Cerveny