132P/Helin–Roman–Alu

Jupiter-family comet 117P/Helin–Roman–Alu September 2026 132P/Helin-Roman-Alu 132P 2021-10-04 image ZTF-sso-397-zi-fov-7.0arcmin.png Comet Helin–Roman–Alu 2 imaged from the Zwicky Transient Facility on 4 October 2021 IAUC_4886 Eleanor F. Helin Brian P. Roman Jeff Alu 26 October 1989 P/1989 U1, P/1997 N2 Helin–Roman–Alu 2nasa-pds 1989 XVI, 1989y jpldata MPC 21 November 2025 (JD 2461000.5) 32.43 yearsobs_arc 1,566 1.698 AU 6.088 AU 3.893 AU 0.56380 7.681 years 5.376° 173.97° 216.52° 188.53° 2.759 0.699 AU 0.015 AU jpldata 0.89 km miFernandez_2013 410 60 kg/m3Paradowski_2022 10.2 15.1 13 November 2021 19 July 2029Horizons2029 132P/Helin–Roman–Alu, also known as Helin–Roman–Alu 2, is a Jupiter-family comet with a 7.68-year orbit around the Sun. It is the third of three comets co-discovered by Eleanor F. Helin, Brian P. Roman, and Jeff Alu.comet_h-r-a See also Comet Helin Notes "comet_h-r-a" The other two comets discovered by the three astronomers were C/1989 T1 (Helin–Roman–Alu) and 117P/Helin–Roman–Alu respectively. "obs_arc" Observation arc from the Minor Planet Center database covering dates from 26 October 1989 until 2 April 2022. References Y. R. Fernández M. S. P. Kelley P. L. Lamy etal Thermal properties, sizes, and size distribution of Jupiter-family cometary nuclei Icarus 2013 226 1 1138–1170 2013Icar..226.1138F 1307.6191 10.1016/j.icarus.2013.07.021 Horizons Batch for 132P/Helin-Roman-Alu 2 (90001044) on 2029-Jul-19 JPL Horizons Perihelion occurs when rdot flips from negative to positive https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D132P%3BCAP%27&START_TIME=%272029-Jul-16%27&STOP_TIME=%272029-Jul-22%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27 2022-06-22 (JPL#K212/19 Soln.date: 2022-Oct-12) E. F. Helin J. Alu B. P. Roman etal D. W. Green Comet 1989y http://www.cbat.eps.harvard.edu/iauc/04800/04886.html IAU Circular 1989-10-30 4886 1 1989IAUC.4886....1H 132P/Helin–Roman–Alu – JPL Small-Body Database Lookup https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=132P ssd.jpl.nasa.gov Jet Propulsion Laboratory 2026-09-20 132P/Helin–Roman–Alu Orbit http://www.minorplanetcenter.net/db_search/show_object?object_id=132P Minor Planet Center 2019-02-25 Periodic Comet Names and Designations https://pds-smallbodies.astro.umd.edu/data_sb/resources/periodic_comets.shtml Planetary Data System: Small Body Node NASA 2026-09-20 M. L. Paradowski A New Indirect Method of Determining Density of Cometary Nuclei https://acta.astrouw.edu.pl/Vol72/n2/pdf/pap_72_2_4.pdf Acta Astronomica 2022 72 2 141–159 2022AcA....72..141P 0001-5237 10.32023/0001-5237/72.2.4 free External links 1000133 132P 132P/Helin–Roman–Alu at the Minor Planet Center database 132P/Helin–Roman–Alu at Gary W. Kronk's Cometography 132P/Helin–Roman–Alu at Seiichi Yoshida's website 131P/Mueller 133P/Elst–Pizarro Category:Periodic comets 0132 0132 132P 132P 132P 132P * *