Mrkos is a comet in the Comet orbit class. Its orbit takes it from 0.35 AU to 1,071.97 AU from the Sun; one orbit takes 12,415.2 years. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 92.738 AU
- True anomaly
- 173.22°
- Distance from Earth
- 93.434 AU
- As of
- 25 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 15h 35m 44s
- Declination
- -53° 33′ 24″
- Constellation
- Norma
- Distance from Earth
- 93.44 AU
- Elongation from the Sun
- 45.26° — near the Sun — look low at dusk or dawn
Favours the southern hemisphere; low or below the horizon from far north.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 536.162 AU
- Eccentricity
- 0.9993
- Inclination
- 93.96°
- Orbital period
- 12,415.2 years
- Perihelion
- 0.355 AU
- Aphelion
- 1,071.969 AU
- Longitude of ascending node
- 68.32°
- Argument of periapsis
- 40.32°
- Epoch · J2000
- 2436272.5
- Orbit class · COM
- Comet
- Earth MOID · 202.8 LD
- 0.521 AU
- Tisserand (Jupiter)
- -0.041
Orbit quality
- Observations used
- 16
- Data arc
- 312 days
- First observed
- 31 August 1957
- Last observed
- 9 July 1958
- Residual RMS
- 0.2 ″
- Solution · Otto Matic
- 15 April 2021
Discovery & classification
Also known as 1957 P1
Sources
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB