Terasako is a comet in the Comet orbit class. Its orbit takes it from 0.39 AU to 164 AU from the Sun; one orbit takes 745.2 years. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 59.751 AU
- True anomaly
- 172.58°
- Distance from Earth
- 59.457 AU
- As of
- 24 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
- 07h 05m 46s
- Declination
- +27° 45′ 46″
- Constellation
- Gemini
- Distance from Earth
- 59.45 AU
- Elongation from the Sun
- 107.36° — well clear of the Sun
Favours the northern hemisphere; low or below the horizon from far south.
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
- 82.194 AU
- Eccentricity
- 0.9952
- Inclination
- 40.86°
- Orbital period
- 745.2 years
- Perihelion
- 0.393 AU
- Aphelion
- 163.995 AU
- Longitude of ascending node
- 97.7°
- Argument of periapsis
- 195.27°
- Epoch · J2000
- 2446833.5
- Orbit class · COM
- Comet
- Earth MOID · 232.2 LD
- 0.5968 AU
- Tisserand (Jupiter)
- 0.65
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 49
- Data arc
- 39 days
- First observed
- 26 January 1987
- Last observed
- 6 March 1987
- Residual RMS
- 0.93 ″
- Solution · Otto Matic
- 15 April 2021
Discovery & classification
Also known as 1987 B2
Sources
- orbital elements: JPL SBDB