Wikipedia Description:
The Medusa Nebula is a planetary nebula in the constellation of Gemini. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell, who classified it as an old planetary nebula.[4] With the computation of expansion velocities and the thermal character of the radio emission, Soviet astronomers in 1971 concluded that it was most likely a planetary nebula.[4] As the nebula is so large, its surface brightness is very low, with surface magnitudes of between +15.99 and +25 reported.[citation needed]
The central star of the planetary nebula is an PG 1159 star.[5]
Acquisition Details:
| Telescope | Takahashi TSA-120 |
| Optics | None |
| Filter | IDAS NB12 Dual Band Filter |
| Camera | ASI2600MC Pro OSC |
| Integration Time | Unknown |
| Subframes | Unknown |
| Date | March 26, 2024 |
| Location | Carlsbad, California |