102P/Shoemaker

For other comets discovered by Carolyn and Eugene Shoemaker, see Comet Shoemaker.

102P/Shoemaker
Discovery
Discovered byCarolyn S. Shoemaker
Eugene Merle Shoemaker
Discovery date27 September 1984
Designations
P/1984 S2
P/1991 L2
  • Shoemaker 1
  • 1984 XVI, 1991 XXIII
  • 1984q, 1991p
Orbital characteristics[2][3]
Epoch21 November 2025 (JD 2461000.5)
Observation arc37.35 years
Earliest precovery date1 September 1984
Number of
observations		529
Aphelion5.562 AU
Perihelion2.079 AU
Semi-major axis3.821 AU
Eccentricity0.45582
Orbital period7.468 years
Inclination25.846°
339.35°
Argument of
periapsis		20.708°
Mean anomaly232.94°
Last perihelion22 January 2021
Next perihelion10 July 2028[1]
TJupiter2.732
Earth MOID0.976 AU
Jupiter MOID0.191 AU
Physical characteristics[2]
Mean radius
0.208 km (0.129 mi)[4]
Comet total
magnitude (M1)		16.2

102P/Shoemaker, also known as Shoemaker 1, is a Jupiter-family comet with a 7.47-year orbit around the Sun. It was first seen in 1984 and then again in 1991. Images taken of it in 1999 were not recognized until 2006 when it was once again observed. It was unexpectedly dim in each of these returns.

References

  1. ^ "Horizons Batch for 102P/Shoemaker 1 (90000944) on 2028-Jul-10" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 13 September 2021. (JPL K213/2 Soln.date: 2022-Feb-06)
  2. ^ a b "102P/Shoemaker 1 – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 14 January 2026.
  3. ^ "102P/Shoemaker Orbit". Minor Planet Center. Retrieved 17 June 2014.
  4. ^ M. L. Paradowski (2022). "A New Indirect Method of Determining Density of Cometary Nuclei" (PDF). Acta Astronomica. 72 (2): 141–159. Bibcode:2022AcA....72..141P. doi:10.32023/0001-5237/72.2.4. ISSN 0001-5237.



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