Schaer is a comet in the Comet orbit class. Its orbit takes it from 1.05 AU to 150.64 AU from the Sun; one orbit takes 660.5 years. Orbit from the JPL solution of 20 February 2024.
Where is it now
- Distance from Sun
- 109.225 AU
- True anomaly
- 174.08°
- Distance from Earth
- 109.667 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
- 17h 59m 41s
- Declination
- -54° 00′ 32″
- Constellation
- Ara
- Distance from Earth
- 109.68 AU
- Elongation from the Sun
- 62.81° — well clear of the Sun
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
- 75.845 AU
- Eccentricity
- 0.9861
- Inclination
- 140.53°
- Orbital period
- 660.5 years
- Perihelion
- 1.051 AU
- Aphelion
- 150.639 AU
- Longitude of ascending node
- 224.3°
- Argument of periapsis
- 132.47°
- Epoch · J2000
- 2417185.5
- Orbit class · COM
- Comet
- Earth MOID · 84.5 LD
- 0.2173 AU
- Tisserand (Jupiter)
- -0.909
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 32
- Data arc
- 34 days
- First observed
- 20 November 1905
- Last observed
- 24 December 1905
- Residual RMS
- 1.32 ″
- Solution · Otto Matic
- 20 February 2024
Discovery & classification
Also known as 1905 W1
Sources
- orbital elements: JPL SBDB