S/2016 J 3

{{Short description|Outer moon of Jupiter}}

{{Use dmy dates|date=January 2023}}

{{Infobox planet

| name = S/2016 J 3

| image = 2016 J 3 DECam 2017-03-23 annotated.gif

| image_size =

| caption = {{nowrap|S/2016 J 3}} imaged by the Cerro Tololo Observatory's Dark Energy Camera on 23 March 2017

| discovery_ref =

| discoverer = Scott S. Sheppard

| discovery_site = Las Campanas Obs.

| discovered = 9 March 2016

| orbit_ref =

| epoch = 25 February 2023 (JD 2460000.5)

| observation_arc = 6.53 yr (2,384 d)

| earliest_precovery_date =

| semimajor = {{cvt|0.1484883|AU|km|lk=in}}

| eccentricity = 0.2360219

| period = –1.85 yr (–676.37 days)

| mean_anomaly = 1.36683°

| mean_motion = {{Deg2DMS|0.53225536|sup=ms}} / day

| inclination = 164.06576° {{small|(to ecliptic)}}

| asc_node = 130.09696°

| arg_peri = 192.07894°

| satellite_of = Jupiter

| group = Carme group

| mean_diameter = ≈{{val|2|u=km}}

| rotation =

| albedo = 0.04 {{small|(assumed)}}

| magnitude = 23.6

| abs_magnitude = 16.7

}}

S/2016 J 3 is a small outer natural satellite of Jupiter discovered by Scott S. Sheppard on 9 March 2016, using the 6.5-meter Magellan-Baade Telescope at Las Campanas Observatory, Chile. It was announced by the Minor Planet Center 7 years later on 5 January 2023, after observations were collected over a long enough time span to confirm the satellite's orbit.

S/2016 J 3 is part of the Carme group, a tight cluster of retrograde irregular moons of Jupiter that follow similar orbits to Carme at semi-major axes between {{convert|22–24|e6km|e6mi|abbr=unit}}, orbital eccentricities between 0.2–0.3, and inclinations between 163–166°. It has a diameter of about {{cvt|2|km|mi}} for an absolute magnitude of 16.7.