MPEC 2026-G52 : S/2017 J 18 (original) (raw)

The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but mustnot otherwise be redistributed electronically.

A form allowing access to any MPEC is atthe bottom of this page.

Read MPEC 2026-G51 Read MPEC 2026-G53

M.P.E.C. 2026-G52 Issued 2026 April 9, 01:18 UT

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

Prepared using the Tamkin Foundation Computer Network

URL https://www.minorplanetcenter.net/ ISSN 1523-6714

S/2017 J 18 Satellite of Jupiter

Observations: SK17J180 5C2017 02 24.56197 13 20 19.514-07 05 14.50 23.9 rcEG052568 SK17J180 5C2017 02 24.62272 13 20 18.528-07 05 07.30 23.7 rcEG052568 SK17J180.C2017 03 23.24858 13 10 16.266-05 52 31.43 23.9 rcEG052807* SK17J180 .C2017 03 23.27130 13 10 15.596-05 52 27.30 23.8 rcEG052807 SK17J180 .C2017 03 26.28417 13 08 50.089-05 42 31.59 24.0 rcEG052807 SK17J180 .C2017 03 26.32711 13 08 48.790-05 42 22.82 23.9 rcEG052807 SK17J180 C2017 04 22.22854 12 55 47.035-04 13 15.21 23.8 rcEG052304 SK17J180 C2017 04 22.26145 12 55 46.106-04 13 09.44 23.8 rcEG052304 SK17J180 C2017 04 23.22524 12 55 20.190-04 10 14.73 23.7 rcEG052304 SK17J180 C2017 04 23.24803 12 55 19.546-04 10 10.86 23.8 rcEG052304 SK17J180 .C2018 05 11.16318 15 12 49.496-16 26 51.57 23.7 rUEG052807 SK17J180 .C2018 05 11.18342 15 12 48.848-16 26 49.19 23.6 rUEG052807 SK17J180 .C2018 05 12.15229 15 12 18.209-16 25 06.97 23.6 rUEG052807 SK17J180 .C2018 05 12.17423 15 12 17.525-16 25 04.69 23.6 rUEG052807 SK17J180 C2018 05 19.24631 15 08 35.419-16 12 42.80 23.9 rUEG052304 SK17J180 C2018 05 19.26791 15 08 34.757-16 12 40.41 23.9 rUEG052304 SK17J180 5C2024 12 02.58694 05 08 04.419+21 54 02.74 23.2 rVEG052T09 SK17J180 5C2024 12 02.59306 05 08 04.229+21 54 02.61 23.1 rVEG052T09 SK17J180 5C2024 12 03.56426 05 07 32.733+21 53 49.75 23.4 rVEG052T09 SK17J180 5C2024 12 03.56578 05 07 32.700+21 53 49.58 23.4 rVEG052T09 SK17J180 5C2024 12 03.57037 05 07 32.529+21 53 49.57 23.4 rVEG052T09 SK17J180 5C2024 12 03.57189 05 07 32.501+21 53 49.47 23.4 rVEG052T09

Observer details: 304 Las Campanas Observatory. Observer S. S. Sheppard. 6.5-m Magellan-Baade telescope + CCD. 568 Maunakea. Observer S. S. Sheppard. 8.2-m Subaru Telescope + CCD. 807 Cerro Tololo Observatory, La Serena. Observer S. S. Sheppard. 4.0-m CTIO reflector + CCD. T09 Subaru Telescope, Maunakea. Observers S. S. Sheppard, D. J. Tholen. Measurer S. S. Sheppard. 8.2-m Subaru reflector + CCD.

Orbital elements: S/2017 J 18 Epoch 2025 Nov. 21.0 TT = JDT 2461000.5 Alexandersen M 176.09386 (2000.0) P Q n 0.53733075 Peri. 334.18055 -0.98470633 -0.15374085 a 0.1475518 Node 162.43285 -0.07032984 +0.78116602 e 0.3538371 Incl. 164.24381 -0.15939621 +0.60509784 P 1.83 H 16.8 P/d 669.98 From 22 observations 2017 Feb. 24-2024 Dec. 03, mean residual 0".20

Residuals in seconds of arc 170224 568 0.1- 0.3- 170423 304 0.0 0.1+ 241202 T09 0.2- 0.0 170224 568 0.0 0.4- 170423 304 0.3- 0.1- 241202 T09 0.0 0.0 170323 807 0.2+ 0.2+ 180511 807 0.2+ 0.1- 241203 T09 0.1- 0.2+ 170323 807 0.1- 0.1- 180511 807 0.3+ 0.2+ 241203 T09 0.1+ 0.0 170326 807 0.1- 0.1- 180512 807 0.3- 0.1- 241203 T09 0.1- 0.1+ 170326 807 0.7- 0.0 180512 807 0.0 0.1- 241203 T09 0.2+ 0.0 170422 304 0.5+ 0.2+ 180519 304 0.3- 0.1- 170422 304 0.2+ 0.0 180519 304 0.1+ 0.0

M. P. C. Staff (C) Copyright 2026 MPC M.P.E.C. 2026-G52

---

Read MPEC 2026-G51 Read MPEC 2026-G53

---

*** 1997-B01 (the full form)** *** J97B01 (the packed version of the full form)** *** B01 (the abbreviated form)**