(457175) 2008 GO98

{{mp|2008 GO|98}} is classified as a member of the dynamical Hilda group, as well as a Jupiter family that shows clear cometary activity, which has also been described as a "quasi-Hilda comet". Orbital backward integration suggests that it might have been a centaur or trans-Neptunian object that ended its dynamical evolution as a quasi-Hilda comet. It may have reached the belt during the last few hundred years.{{cite journal | last1=de la Fuente Marcos |first1=Raúl |last2=de la Fuente Marcos |first2=Carlos |date=15 July 2022 |title=Recent arrivals to the main asteroid belt |journal=Celestial Mechanics and Dynamical Astronomy |volume= 134|issue= 5|page=38 |arxiv=2207.07013 |bibcode= 2022CeMDA.134...38D|doi=10.1007/s10569-022-10094-4 | doi-access=free }}

It orbits the Sun in the outer asteroid belt at a distance of 2.9–5.1 AU once every 7 years and 11 months (2,883 days; semi-major axis of 3.96 AU). Its orbit has an eccentricity of 0.28 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins with a precovery taken by the Sloan Digital Sky Survey in October 2001, more than 5 years prior to its official discovery observation by Spacewatch.

Although {{mp|2008 GO|98}} orbits in the asteroid belt, it has a Jupiter Tisserand's parameter (T_J) of 2.926, just below Jewitt's threshold of 3, which serves as a distinction between the main-belt asteroids (T_J larger than 3) and the Jupiter-family comets (T_J between 2 and 3).

This minor planet was numbered by the Minor Planet Center on 16 February 2016 ({{small|M.P.C. 98587}}). As of 2020, it has not been named.

{{mp|2008 GO|98}} is an assumed C-type asteroid.

In August 2017, a rotational lightcurve of {{mp|2008 GO|98}} was obtained from photometric observations by American astronomer Brian Warner at the Palmer Divide Station {{Obscode|U82}} in California. Lightcurve analysis gave a rotation period of {{val|10.74|0.01}} hours with a small brightness amplitude of 0.12 magnitude ({{small|U=2}}).{{efn|name=Lightcurve-plot-Warner}}

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous body of 0.057 and calculates a diameter of 14.64 kilometers based on an absolute magnitude of 12.9. Other estimates, taking into account several published magnitude measurements and a large range of albedo assumptions, estimate a diameter range of 5.5 to 24.7 kilometers.

{{notelist|refs=

{{efn|name=Lightcurve-plot-Warner|1=[http://www.planetarysciences.org/plots/BDW/457175_2008GO98_20170728.PNG Lightcurve plot of (457175) {{mp|2008 GO|98}}], by B. D Warner, at [http://planetarysciences.org/ CS3] (2017). Rotation period {{val|10.74|0.01}} hours with a brightness amplitude of {{val|0.12|0.02}} mag. Quality Code is 2. Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=457175%7C LCDB].}}

}}

{{reflist|30em|refs=

{{cite web

|type = 2017-11-02 last obs.

|title = JPL Small-Body Database Browser: 457175 (2008 GO98)

|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2457175

|publisher = Jet Propulsion Laboratory

|accessdate = 15 September 2018}}

{{cite web

|title = 457175 (2008 GO98)

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=457175

|accessdate = 12 December 2020}}

{{cite web

|title = MPC/MPO/MPS Archive

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html

|accessdate = 14 February 2018}}

{{cite web

|title = MPEC 2017-N50 : COMETARY ACTIVITY IN (457175) 2008 GO98

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/mpec/K17/K17N50.html

|accessdate = 14 February 2018}}

{{cite web

|title = 362P/2008 GO98

|publisher = Asteroid-Analytics

|date = 21 July 2017

|url = https://asteroidanalytics.com/2008go98/

|accessdate = 14 February 2018}}

{{Cite journal

|first1 = R. |last1 = Gil-Hutton

|first2 = E. |last2 = García-Migani

|date = May 2016

|title = Comet candidates among quasi-Hilda objects

|url = https://www.aanda.org/articles/aa/pdf/2016/06/aa28184-16.pdf

|journal = Astronomy and Astrophysics

|volume = 590

|page = 5

|bibcode = 2016A&A...590A.111G

|doi = 10.1051/0004-6361/201628184

|access-date= 14 February 2018|doi-access= free

}}

{{Cite web

|title = The Tisserand Parameter

|author = David Jewitt

|url = http://www2.ess.ucla.edu/~jewitt/tisserand.html

|accessdate = 15 September 2018}}

{{cite web

|title = LCDB Data for (457175)

|publisher = Asteroid Lightcurve Database (LCDB)

|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=457175%7C

|accessdate = 14 February 2018}}

}}

• [https://www.minorplanetcenter.net/mpec/K17/K17N50.html COMETARY ACTIVITY IN (457175) 2008 GO98], Minor Planet Electronic Circular, Minor Planet Center
• [https://catalina.lpl.arizona.edu/news/it%E2%80%99s-asteroid-it%E2%80%99s-comet-it%E2%80%99s%E2%80%A6well-both-now It's an Asteroid, It's a Comet, It's... well, Both for Now!], Catalina Sky Survey, Lunar and Planetary Laboratory
• [https://www.virtualtelescope.eu/2017/08/25/cometary-activity-457175-2008-go98-new-observations-23-aug-2017/ Cometary activity in (457175) 2008 GO98], The Virtual Telescope, 23 August 2017
• [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
• [https://www.minorplanetcenter.net/iau/lists/NumberedMPs455001.html Discovery Circumstances: Numbered Minor Planets (455001)-(460000)] – Minor Planet Center
• {{AstDys|457175}}
• {{JPL small body|id=2457175}}

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