View source for S/2003 J 16

{{Short description|Moon of Jupiter}}
{{Infobox planet
| name            = S/2003 J 16
| image           = 2003 J 16 CFHT recovery full.gif
| image_scale      =
| caption         = Recovery images of S/2003 J 16 taken by the [[Canada-France-Hawaii Telescope]] in September 2010
| discovery_ref   = &thinsp;<ref name="MPEC-2003-G18"/>
| discoverer      = [[Brett J. Gladman]]<br/>[[John J. Kavelaars]]<br/>[[Jean-Marc Petit]]<br/>Lynne Allen
| discovery_site  = [[Mauna Kea Observatory|Mauna Kea Obs.]]
| discovered      = 6 February 2003
| orbit_ref       = &thinsp;<ref name="MPEC-2020-V10"/>
| epoch           = 17 December 2020 ([[Julian day|JD]] 2459200.5)
| observation_arc = 15.26 [[Julian year (astronomy)|yr]] (5,574 [[day|d]])
| semimajor       = {{cvt|0.1371176|AU|km|lk=in}}
| eccentricity    = 0.3330999
| period          = –1.64 yr (–600.18 d)
| mean_anomaly    = 88.24314[[Degree (angle)|°]]
| mean_motion     = {{Deg2DMS|0.59981685|sup=ms}} / day
| inclination     = 151.16323° {{small|(to [[ecliptic]])}}<br/>28.83677° {{small|(retrograde)}}
| asc_node        = 83.26365°
| arg_peri        = 86.51495°
| satellite_of    = [[Jupiter]]
| group           = [[Ananke group]]
| mean_diameter   = ≈{{val|2|u=km}}<ref name="SheppardMoons"/>
| rotation        = 
| albedo          = 0.04 {{small|(assumed)}}<ref name="SheppardMoons"/>
| magnitude       = 23.3<ref name="SheppardMoons"/>
| abs_magnitude   = 16.3<ref name="MPEC-2020-V10"/>
}}

'''{{nowrap|S/2003 J 16}}''' is a [[natural satellite]] of [[Jupiter]]. It was discovered by a team of astronomers led by [[Brett J. Gladman]] in 2003.<ref>[http://cbat.eps.harvard.edu/iauc/08100/08116.html IAUC 8116: ''Satellites of Jupiter and Saturn''] {{webarchive|url=https://web.archive.org/web/20060505210146/http://cfa-www.harvard.edu/iauc/08100/08116.html |date=2006-05-05 }} 2003  April (discovery)</ref><ref name="MPEC-2003-G18"/>

{{nowrap|S/2003 J 16}} is about 2 kilometres in diameter, and orbits Jupiter at an average distance of {{cvt|0.137|AU|Gm}} in 600 days, at an [[inclination]] of 151° to the [[ecliptic]] (149° to Jupiter's equator), in a [[retrograde motion|retrograde]] direction and with an [[eccentricity (orbit)|eccentricity]] of 0.333. It belongs to the [[Ananke group]] of retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.<ref name="SheppardMoons"/>

[[File:2003 J 16 CFHT recovery image.png|thumb|left|Recovery image of S/2003 J 16 on 8 September 2010 (circled)]]

This moon was once considered [[lost asteroid|lost]]<ref>{{cite web |url=http://www.skyandtelescope.com/astronomy-news/outer-planet-moons-found-and-lost/ |title=Outer-Planet Moons Found — and Lost |last=Beatty |first=Kelly |date=4 April 2012 |website=www.skyandtelescope.com |publisher=Sky & Telescope |access-date=27 June 2017}}</ref><ref name="SheppardMoons">{{cite web |url=http://home.dtm.ciw.edu/users/sheppard/satellites/jup2017.html |title=New Moons of Jupiter Announced in 2017 |last=Sheppard |first=Scott S. |date=2017 |website=home.dtm.ciw.edu |access-date=27 June 2017 |quote=We likely have all of the lost moons in our new observations from 2017, but to link them back to the remaining lost 2003 objects requires more observations a year later to confirm the linkages, which will not happen until early 2018. ...  There are likely a few more new moons as well in our 2017 observations, but we need to reobserve them in 2018 to determine which of the discoveries are new and which are lost 2003 moons. |archive-date=10 June 2017 |archive-url=https://web.archive.org/web/20170610075918/http://home.dtm.ciw.edu/users/sheppard/satellites/jup2017.html |url-status=dead }}</ref> until September 2010, when it was recovered by Christian Veillet with [[Canada-France-Hawaii Telescope]] (CFHT).<ref name="Jacobson2012"/><ref name="Brozovic2017"/> However, the recovery observations of S/2003 J 16 were not reported by the [[Minor Planet Center]] until 2020, when Ashton et al. independently identified the moon in the same CFHT images taken by Veillet back in September 2010.<ref name="Ashton2020"/> S/2003 J 16 was also identified in observations by [[Scott Sheppard]] from March 2017 to May 2018, cumulating a long [[observation arc]] of 5,574 days (15 years) since its discovery. The recovery of S/2003 J 16 was formally announced by the Minor Planet Center on 4 November 2020.<ref name="Ashton2020"/><ref name="MPEC-2020-V10"/>

{{clear|left}}

==References==
{{reflist|

<ref name="MPEC-2003-G18">{{cite web
  |title      = MPEC 2003-G18 : S/2003 J 16
  |url        = https://minorplanetcenter.net//iau/mpec/K03/K03G18.html
  |work       = Minor Planet Electronic Circular
  |publisher  = Minor Planet Center
  |date       = 3 April 2003}}</ref>

<ref name="MPEC-2020-V10">{{cite web
  |title      = MPEC 2020-V10 : S/2003 J 16
  |url        = https://minorplanetcenter.net/mpec/K20/K20V10.html
  |work       = Minor Planet Electronic Circular
  |publisher  = Minor Planet Center
  |date       = 4 November 2020
  |accessdate = 4 November 2020}}</ref>

<ref name="Jacobson2012">{{cite journal |last1=Jacobson |first1=B. |last2=Brozović |first2=M. |first3=B. |last3=Gladman |first4=M. |last4=Alexandersen |first5=P. D. |last5=Nicholson |first6=C. |last6=Veillet |date=28 September 2012 |title=Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011 |journal=The Astronomical Journal |volume=144 |issue=5 |pages=132 |doi=10.1088/0004-6256/144/5/132 |bibcode = 2012AJ....144..132J |s2cid=123117568 |doi-access=free }}</ref>

<ref name="Brozovic2017">{{cite journal |last1=Brozović |first1=Marina |last2=Jacobson |first2=Robert A. |date=9 March 2017 |title=The Orbits of Jupiter's Irregular Satellites |journal=The Astronomical Journal |volume=153 |issue=4 |pages=147 |doi=10.3847/1538-3881/aa5e4d|bibcode = 2017AJ....153..147B |doi-access=free }}</ref>

<ref name="Ashton2020">{{cite journal|title = The Population of Kilometer-scale Retrograde Jovian Irregular Moons |first1 = Edward |last1 = Ashton |first2 = Matthew |last2 = Beaudoin |first3 = Brett |last3 = Gladman |authorlink3 = Brett J. Gladman |date = September 2020 |journal = The Planetary Science Journal |volume = 1 |issue = 2 |pages = 52 |doi = 10.3847/PSJ/abad95 |arxiv = 2009.03382 |bibcode = 2020PSJ.....1...52A|s2cid = 221534456 |doi-access = free }}</ref>

}}

{{Moons of Jupiter}}

{{DEFAULTSORT:S 2003 J 16}}
[[Category:Ananke group]]
[[Category:Moons of Jupiter]]
[[Category:Irregular satellites]]
[[Category:Astronomical objects discovered in 2003|20030206]]
[[Category:Discoveries by Brett J. Gladman]]
[[Category:Discoveries by Jean-Marc Petit]]
[[Category:Discoveries by John J. Kavelaars]]
[[Category:Discoveries by Rhiannon Lynne Allen]]
[[Category:Moons with a retrograde orbit]]
[[Category:Recovered astronomical objects]]