SUNSET: 
0
Photographer:
Jon Greif
Location of Photo:
Anza Borrego State Park, Borrego, CA USA
Date/Time of photo:
October 17, 2025, at 7 pm PDT
Equipment:
SeeStar S50 "Smart Scope." Processing with Pixinsight 1.8.9 software.
Description:
This is Comet C/2025 R2 (SWAN), imaged with our SeeStar S50 telescope low in the southwestern sky in the early evening October 17, from our campground in Anza Borrego State Park. Comet C/2025 R2 (SWAN) was discovered just a few weeks earlier, September 11, 2025, by Ukrainian amateur astronomer Vladimir Bezugly using the Solar Wind Anisotropies (SWAN) instrument aboard NASA-ESA’s Solar and Heliospheric Observatory (SOHO) spacecraft, marking the 20th comet discovered through SWAN imagery. Ground-based confirmation came from Czech astronomer Martin Mašek using the FRAM telescope in Chile, who was “very pleasantly surprised by such a bright comet”. Between October 18–21, SWAN passed just 23 million miles from Earth.
