(532037) 2013 FY27#Satellite

File:2013 FY27-orbit.png

{{mp|2013 FY|27}} orbits the Sun once every 449 years. It will come to perihelion around November 2202,{{efn| The uncertainty in the time of perihelion passage is ≈1 month (1-sigma) or 3.6 months (3-sigma).}} at a distance of about 35.6 AU. It is currently near aphelion, 80 AU from the Sun, and, as a result, it has an apparent magnitude of 22. Its orbit has a significant inclination of 33°.

The sednoid {{mpl|2012 VP|113}} and the scattered-disc object {{mpl|2013 FZ|27}} were discovered by the same survey as {{mp|2013 FY|27}} and were announced within about a week of one another.

{{mp|2013 FY|27}} has a diameter of about {{convert|740|km|mi}}, placing it at a transition zone between medium-sized and large TNOs. Using the Atacama Large Millimeter Array and Magellan Telescopes, its albedo was found to be 0.17, and its colour to be moderately red. {{mp|2013 FY|27}} is one of the largest moderately red TNOs. The physical processes that lead to a lack of such moderately red TNOs larger than {{convert|800|km|mi}} are not yet well understood.

The brightness of {{mp|2013 FY|27}} varies by less than {{val|0.06|u=mag}} over hours and days, suggesting that it either has a very long rotation period, an approximately spheroidal shape, or a rotation axis pointing towards Earth.

{{mp|2013 FY|27}} is a possible dwarf planet, though not a likely one. Grundy et al. calculate that bodies less than about 1000 km in diameter, with albedos less than ≈0.2 and densities less than ≈1.2 g/cm³, may retain a degree of porosity in their physical structure, having never collapsed into fully solid bodies, and therefore could not be dwarf planets.W.M. Grundy, K.S. Noll, M.W. Buie, S.D. Benecchi, D. Ragozzine & H.G. Roe, 'The Mutual Orbit, Mass, and Density of Transneptunian Binary Gǃkúnǁʼhòmdímà ({{mp|(229762) 2007 UK|126}})', Icarus [http://www2.lowell.edu/~grundy/abstracts/2019.G-G.html] {{Webarchive|url=https://web.archive.org/web/20190407045334/http://www2.lowell.edu/~grundy/abstracts/2019.G-G.html |date=7 April 2019 }} doi: 10.1016/j.icarus.2018.12.037, However, the albedo of {{mp|2013 FY|27}} may be around that limit, and there is no way to estimate its density.

{{mp|2013 FY|27}}'s surface area is likely similar to that of Texas. https://www.spacereference.org/asteroid/532037-2013-fy27

{{Infobox planet

| name =

| image = 2013FY27.gif

| caption = Animation of {{mp|2013 FY|27}} and its satellite, imaged by the Hubble Space Telescope from January to July 2018

| discovery_ref =

| discoverer = {{plainlist |

• Scott Sheppard
• Yanga R. Fernández
• Arielle Moullet

}}

| discovered = 15 January 2018

| mpc_name =

| pronounced =

| named_after =

| alt_names =

| adjectives =

| orbit_ref =

| epoch =

| semimajor = {{val|9800|40|p=> |u=km}}

| eccentricity =

| period = {{val|19|u=d|p=≈}} (for assumed density {{val|1.6|u=g/cm3}})

| inclination =

| satellite_of = {{mp|2013 FY|27}}

| mean_diameter = {{val|186|u=km|p=≈}} (assuming equal albedos)

| mass =

| density =

| albedo = {{val|0.170|0.045|0.030}} (assumed)

| spectral_type =

| magnitude = 25.5

| abs_magnitude = 6.15{{efn|Given the primary's absolute magnitude of H {{=}} 3.15 and a magnitude difference of Δm {{=}} 3.00 between the primary and satellite, the sum of those magnitudes is the satellite's absolute magnitude, 6.15.}}

}}

Using Hubble Space Telescope observations taken in January 2018, Scott Sheppard found a satellite around {{mp|2013 FY|27}}, that was 0.17 arcseconds away and {{val|3.0|0.2|u=mag}} fainter than its primary. The discovery was announced on 10 August 2018. The satellite does not have a provisional designation nor a proper name. Assuming the two components have equal albedos, they are about {{val|742|78|83|u=km}} and {{val|186|20|u=km}} in diameter, respectively. Follow-up observations were taken between May and July 2018 in order to determine the orbit of the satellite, but the results of these observations remain yet to be published {{as of|2022|lc=y}}. Once the orbit is known, the mass of the system can be determined.

• List of Solar System objects most distant from the Sun
• List of Solar System objects by size

{{notelist}}

{{reflist|refs=

{{cite web |type=last observation: 2022-01-09; arc: 10.82 years |title=JPL Small-Body Database Browser: (2013 FY27) |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2013FY27 |publisher=Jet Propulsion Laboratory |access-date=6 March 2023}}

{{cite web |title=MPEC 2014-F82 : 2013 FY27 |publisher=IAU Minor Planet Center |date=2014-03-31 |url=https://www.minorplanetcenter.net/mpec/K14/K14F82.html |access-date=2018-03-29}} (K13F27Y)

{{cite web |title=JPL Small-Body Database Search Engine: orbital class (TNO) and H < 3.2 (mag) |publisher=JPL Solar System Dynamics |url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;ast_orbit_class=TNO;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=Ai;c1_op=%3C;c1_value=3.2;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCjCpAi;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AiA |access-date=2019-06-01}}

{{cite journal |first1=Scott |last1=Sheppard |first2=Yanga |last2=Fernandez |first3=Arielle |last3=Moullet |title=The Albedos, Sizes, Colors and Satellites of Dwarf Planets Compared with Newly Measured Dwarf Planet 2013 FY27 |journal=The Astronomical Journal |volume=156 |issue=6 |pages=270 |date=6 September 2018 |arxiv=1809.02184 |doi=10.3847/1538-3881/aae92a |bibcode=2018AJ....156..270S|s2cid=119522310 |doi-access=free }}

{{cite web|title=CBET 4537: 2013 FY27|url=http://www.cbat.eps.harvard.edu/iau/cbet/004500/CBET004537.txt|first=Daniel W. E.|last=Green|work=Central Bureau Electronic Telegram|publisher=Central Bureau for Astronomical Telegrams |date=10 August 2018 |accessdate=9 September 2018}}

{{cite web |url=https://archive.stsci.edu/proposal_search.php?id=15460&mission=hst |title=The Orbit of the Newly Discovered Satellite around the Dwarf Planet 2013 FY27 - HST Proposal 15460 |author=Scott Sheppard |date=21 March 2018 |access-date=9 September 2018}}

{{cite web |url=https://archive.stsci.edu/proposal_search.php?id=15248&mission=hst |title=A Satellite Search of a Newly Discovered Dwarf Planet{{Snd}} HST Proposal 15248 |author=Scott Sheppard |date=7 April 2017 |access-date=9 September 2018}}

{{cite web |last = Lakdawalla | first = Emily |author-link = Emily Lakdawalla |title = More excitement in the outermost solar system: 2013 FY27, a new dwarf planet |work = www.planetary.org/blogs |publisher = The Planetary Society |date = 2014-04-02 |url = http://www.planetary.org/blogs/emily-lakdawalla/2014/04020847-2013-fy27.html |access-date = 18 January 2017}}

{{cite web |title=List Of Centaurs and Scattered-Disk Objects |publisher=Minor Planet Center |url=http://www.minorplanetcenter.org/iau/lists/Centaurs.html |access-date=2014-04-02}}

{{cite web

|title = (532037) 2013 FY27

|url = http://www.johnstonsarchive.net/astro/astmoons/am-532037.html

|first = Wm. Robert |last = Johnston

|work = Johnston's Archive

|date = 27 May 2019

|accessdate = 3 January 2023}}

{{cite web

|title = 532037 (2013 FY27)

|url = http://www2.lowell.edu/users/grundy/tnbs/532037_2013_FY27.html

|first = Will |last = Grundy

|website = Lowell Observatory

|date = 21 March 2022

|accessdate = 3 January 2023}}

}}

• [http://www.johnstonsarchive.net/astro/astmoons/am2013fy27.html 2013 FY27], Minor planets with Satellites Database, Johnston's Archive
• [http://astroblogger.blogspot.com.au/2014/04/celestia-files-of-recent-dwarf-planet.html Celestia Files of the recent Dwarf Planet finds] (Ian Musgrave: 6 April 2014)
• [https://www.newscientist.com/article/dn25351-gaggle-of-dwarf-planets-found-by-dark-energy-camera.html Gaggle of dwarf planets found by Dark Energy Camera] (Aviva Rutkin: 2 April 2014)
• {{AstDys|532037}}
• {{JPL small body}}

{{Minor planets navigator | |number=532037 |PageName={{mp|(532037) 2013 FY|27}} | }}

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