S/2007 S 2

{{Short description|Moon of Saturn}}

{{Infobox planet

| name = S/2007 S 2

| discovery_ref = Discovery Circumstances [http://ssd.jpl.nasa.gov/?sat_discovery from JPL]

| discoverer = Sheppard et al.

| discovered = 2007

| orbit_ref = {{cite web|url=https://sites.google.com/carnegiescience.edu/sheppard/moons/saturnmoons|last=Sheppard|first=S. S.|year=2019|title=Moons of Saturn, Carnegie Science, on line}}

| semimajor = {{val|15850000|u=km}}

| inclination = 176.6°

| eccentricity = 0.275

| period = −742.08 days

| satellite_of = Saturn

| group = Norse group

| physical_ref =

| mean_diameter = 5 km

| albedo = 0.06 (assumed)

| spectral_type = B–R = 1.37 ± 0.09{{Cite journal |last=Graykowski |first=Ariel |last2=Jewitt |first2=David |date=2018-04-05 |title=Colors and Shapes of the Irregular Planetary Satellites |url=https://iopscience.iop.org/article/10.3847/1538-3881/aab49b |journal=The Astronomical Journal |language=en |volume=155 |issue=4 |pages=184 |doi=10.3847/1538-3881/aab49b |issn=1538-3881 |doi-access=free|arxiv=1803.01907 }}

| magnitude = 24.4

| abs_magnitude = 15.3

}}

S/2007 S 2 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on May 1, 2007, from observations taken between January 18 and April 19, 2007. S/2007 S 2 is about 5 kilometres in diameter, and orbits Saturn at an average distance of 16,054,500 kilometres in 759.2 days, at an inclination of 176.65° to the ecliptic, in a retrograde direction and with an eccentricity of 0.237.{{cite web|url=https://www.minorplanetcenter.net/mpec/K19/K19TG5.html|title=MPEC 2019-T165 : S/2007 S 2|first=A. U.|last=Tomatic|work=Minor Planet Electronic Circular|publisher=Minor Planet Center|date=8 October 2019}} According to Denk et al. (2018), it is presumably at high risk of colliding with Phoebe in the future.{{cite book |last1=Denk |first1=Tilmann |url= |title=Enceladus and the Icy Moons of Saturn |last2=Mottola |first2=Stefano |last3=Tosi |first3=Frederico |last4=Bottke |first4=William F. |last5=Hamilton |first5=Douglas P. |publisher=The University of Arizona Press |year=2018 |isbn=9780816537075 |editor-last1=Schenk |editor-first1=Paul M. |series=Space Science Series |volume=322 |location=Tucson, AZ |pages=409–434 |chapter=The Irregular Satellites of Saturn |bibcode=2018eims.book..409D |doi=10.2458/azu_uapress_9780816537075-ch020 |editor-last2=Clark |editor-first2=Roger N. |editor-last3=Howett |editor-first3=Carly J. A. |editor-last4=Verbiscer |editor-first4=Anne J. |editor-last5=Waite |editor-first5=J. Hunter|chapter-url=https://tilmanndenk.de/wp-content/uploads/DenkEtAl2018_IrregularMoons.pdf}}

The moon was once considered lost in 2007 as it was not seen since its discovery.{{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}}{{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 }} The moon was later recovered and announced in October 2019.{{cite web|title=Saturn Surpasses Jupiter After The Discovery Of 20 New Moons And You Can Help Name Them!|url=https://carnegiescience.edu/news/saturn-surpasses-jupiter-after-discovery-20-new-moons-and-you-can-help-name-them|publisher=Carnegie Science|date=October 7, 2019}}{{cite web |last1=Sheppard |first1=Scott |title=Scott S. Sheppard - SaturnMoons |url=https://sites.google.com/carnegiescience.edu/sheppard/moons/saturnmoons |website=sites.google.com |access-date=7 October 2019}}