Contains:Minor planet
Asteroid Myrrha in Leo Triplet, 


        Ahmet Kale

Asteroid Myrrha in Leo Triplet

Technical card

Resolution: 2420x1675

Dates: Jan. 25, 2015

Frames: Astronomik CLS CCD clip in: 31x150" ISO800

Integration: 1.3 hours

Darks: ~20

Flats: ~20

Bias: ~50

Avg. Moon age: 5.58 days

Avg. Moon phase: 31.33%

Locations: Home, Kocaeli, Turkey

Data source: Unknown


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.
"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."
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
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



Ahmet Kale
License: Attribution-NonCommercial-ShareAlike Creative Commons


  • Asteroid Myrrha in Leo Triplet, 


        Ahmet Kale
  • Asteroid Myrrha in Leo Triplet, 


        Ahmet Kale
  • Final
    Asteroid Myrrha in Leo Triplet, 


        Ahmet Kale


Asteroid Myrrha in Leo Triplet, 


        Ahmet Kale

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