Giacobini
C/1905 F1 (Giacobini)
Where is it now
- Distance from Sun
- 17.77 AU
- True anomaly
- 157.11°
- As of
- 17 September 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
- 20h 59m 59s
- Declination
- +00° 00′ 33″
- Constellation
- Aquarius
- Distance from Earth
- 17 AU
- Elongation from the Sun
- 139.02° — well clear of the Sun
Visible from both hemispheres.
From your location
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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
- 23.561 AU
- Eccentricity
- 0.9528
- Inclination
- 40.07°
- Orbital period
- 114.4 years
- Perihelion
- 1.113 AU
- Aphelion
- 46.009 AU
- Longitude of ascending node
- 158.95°
- Argument of periapsis
- 358.16°
- Epoch · J2000
- 2416955.5
- Orbit class · HTC
- Halley-type comet
- Earth MOID · 47.8 LD
- 0.1227 AU
- Tisserand (Jupiter)
- 1.21
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 9).
- Observations used
- 5
- Data arc
- 25 days
- First observed
- 6 April 1905
- Last observed
- 1 May 1905
- Residual RMS
- 0.51 ″
- Solution · Otto Matic
- 12 April 2023
Discovery & classification
Also known as 1905 F1
Sources
- orbital elements: JPL SBDB