6-21-25 (230) Athamantis in Sagittarius
60 images at 120s each for 2 hours total, 8 EdgeHD, Nikon D750, lights, flats and biases
(230) Athamantis in Sagittarius is a 10th magnitude main belt asteroid which orbits the Sun between Mars and Jupiter every 3.7 years at an average distance of 2.4 AU. It is 109 km in diameters.
"230 Athamantis is a fairly large main-belt asteroid that was discovered by the German-Austrian astronomer K. de Ball on September 3, 1882, in Bothkamp. It was his only asteroid discovery. The asteroid was named after Athamantis, daughter of Athamas the mythical Greek king of Orchomenus.
Photometric observations of this asteroid gave a light curve with a period of 23.99 hours and a brightness variation of more than 0.20 in magnitude. It has the spectrum of an S-type asteroid. During 1991, the asteroid was observed occulting a star. The resulting chords provided a cross-section diameter estimate of 101.8 km."
Stacked in Siril, notated and rotated by ASTAP. Shows the star field:
