Messier 105 - Elliptical Galaxy

Messier 105, also known as NGC 3379, is an elliptical galaxy 36.6 million light-years away froom in the constellation of Leo. It is the biggest elliptical galaxy in the Messier catalogue that is not in the Virgo cluster. It was discovered by Pierre Méchain in 1781, just a few days after he discovered the nearby galaxies Messier 95 and Messier 96. This galaxy is one of a few not object-verified by Messier so omitted in the editions of his Catalogue of his era. It was appended when Helen S. Hogg found a letter by Méchain locating and describing this object which matched those aspects under its first-published name, NGC 3379.

Messier 105 has a classification as a standard elliptical galaxy with a small flattening of 10%. Messier 105 is known to have a supermassive black hole at its core whose mass is estimated to be between 140 million and 200 million solar masses. The galaxy has a weak active galactic nucleus.

Messier 105 is one of several galaxies within the Messier 96 Group (also known as the Leo I Group), a group of galaxies in the constellation Leo, the other Messier objects of which are Messier 95 and Messier 96. It is one of the richest group of galaxies in the Local Volume, and unlike the our Local Group, it is dominated by not one but several galaxies.

Equipment:
OTA: SVBONY SV503 70ED 70mm Refractor f/6
Reducer: SVBONY SV193 0.8x reducer f/4.8
Filter: SVBONY CLS City Light Suppression filter
Camera: ZWO ASI183MC Pro Cooled Color Camera (20.1 mp) Mount: Explore Scientific EX02GT with PMC8
120x30s subs (1 hour) stacked in SharpCap 4.1 with darks & flats
Processed with GraXpert, Topaz AI Denoise, and Siril.