The Rho Ophiuchi cloud complex is a complex of interstellar clouds with different nebulae in the constellation Ophiuchus. At an estimated distance of 460 light years, it is one of the closest star-forming regions to the Solar System.
On this image we see ρ Ophiuchi at the center of the large blue area (IC 4604).
| Object | IC 4604 – Blue Nebula of Rho Ophiuchi |
| Constellation: | Scorpio |
| Position: |
RA 16h 24m 16s Dec -23° 38' 38'' |
| Apparent Size: | 2° x 1.5° |
| Apparent Magnitude: | |
| Distance in light years: | 480 ly |
| Photo Data | |
| Date of Expose: | 15./16./17./18./20./25.06./ 11./12./17.07.2023 |
| Location: | Heaven's Mirror Observatory Australia Yass, NSW 2582, Australia, ASL 530m GPS: -34.8285 N, 148.8413 W |
| Telescope: | AUS-2_CMOS: Takahashi FSQ-106ED f3.6/382mm |
| Camera: | QHY 600M Pro, 3.76μm, 9576px x 6382px, @ T sensor = -10°C |
| Field of View: | 233'x155' |
| Pixel Scale/Resolution: | 1.46 arcsec/px |
| Expose frames/times: | L 45x300s, R 46x300s, G 38x300s, B 36x300s |
| Total expose: | 10h 55min |
| Filter: | Astrodon Luminance, Red, Green, Blue |
| Mount: | Paramount MX+ |
| Software: | Siril 1.4, Photoshop CC |
| Remarks: |
© 2025 Peter Cerveny