I accidentally captured asteroid Myrrha while capturing Leo Triplet. This is the first time I captured an asteroid. While I was checking the light frames using the Blink tool in PixInsight, I realized something moving in the middle of the images.

It wasn't easy to identify the object. I tried Astrometrica but couldn't manage to work it. So, I manually calculated the location of the object in Stellarium and using this information I found it on the MPC database.

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"381 Myrrha is a very large main-belt asteroid that was discovered by _French astronomer Auguste Charlois on January 10, 1894, in Nice. It is classified as a C-type asteroid and is probably composed of carbonaceous material.

Photometric observations of this asteroid at the Oakley Observatory in Terre Haute, Indiana during 2006 gave a light curve with a period of 6.572 ± 0.002 hours and a brightness variation of 0.34 ± 0.05 in magnitude.

10µ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 126 km. The occultation of Alhena (γ Geminorum) by Myrrha was observed in Japan and China on January 13, 1991, allowing the size and shape of Myrrha to be clarified."

(WikiPedia)

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Captured: 25.01.2015 00:08 - 01:52 UTC, Kocaeli, TURKEY

Optic: C11 EdgeHD on CGEM DX

Camera: Canon Rebel T2i (Hutech Modified)

Software: PixInsight 1.8

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IAU Minor Planet Center Info:

(381) Myrrha = A894AS

Discovered at Nice on 1894-01-10 by A. Charlois.

Orbit type: Main Belt

epoch: 2014-12-09.0

epoch JD: 2457000.5

perihelion date: 2016-09-17.72384

perihelion JD: 2457649.22384

argument of perihelion (°): 141.74925

ascending node (°): 125.12381

inclination (°): 12.56132

eccentricity: 0.0900209

perihelion distance (AU): 2.9379871

Tisserand w.r.t. Jupiter: 3.1

ΔV w.r.t. Earth (km/sec): 11.3

semimajor axis (AU): 3.2286315

mean anomaly (°): 249.78620

mean daily motion (°/day): 0.16989330

aphelion distance (AU): 3.519

period (years): 5.8

absolute magnitude: 8.25

phase slope: 0.15

Average orbital speed: 16.6 km/s

Dimensions: 147.2×126.6 km 123.41 ± 6.30 km

Mean density: 9.32 ± 1.64[2] g/cm3

Orbital period: 2109.318 d (5.77 a)

Animation link: Asteroid Myrrha in Leo Triplet