{{Short description|Main-belt asteroid}} {{Distinguish|236305 Adamriess}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 7655 Adamries | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = <ref name="jpldata" /> | discovered = 28 December 1991 | discoverer = F. Börngen | discovery_site = {{nowrap|Karl Schwarzschild Obs.}} | mpc_name = (7655) Adamries | alt_names = {{mp|1991 YM|1}}{{·}}1977 BW | named_after = Adam Ries<br />{{small|(mathematician)}}<ref name="springer" /> | mp_category = main-belt{{·}}Nysa<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 39.60 yr (14,464 days) | aphelion = 2.7494 AU | perihelion = 2.0848 AU | semimajor = 2.4171 AU | eccentricity = 0.1375 | period = 3.76 yr (1,373 days) | mean_anomaly = 289.57° | mean_motion = {{Deg2DMS|0.2623|sup=ms}} / day | inclination = 4.0156° | asc_node = 103.41° | arg_peri = 8.9941° | dimensions = 3.60 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|4.21|0.96}} km<ref name="Masiero-2012" /> | rotation = {{val|22.8758|0.1133}} h<ref name="Waszczak-2016" /> | albedo = 0.21 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.250|0.124}}<ref name="Masiero-2012" /> | spectral_type = C<ref name="Veres-2015" />{{·}}S<ref name="lcdb" /> | abs_magnitude = 14.00<ref name="Masiero-2012" />{{·}}{{val|14.081|0.004}} {{small|(R)}}<ref name="Waszczak-2016" />{{·}}14.1<ref name="jpldata" />{{·}}14.53<ref name="lcdb" />{{·}}{{val|14.56|0.26}}<ref name="Veres-2015" /> }}
'''7655 Adamries''', provisional designation {{mp|1991 YM|1}}, is a Nysa asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 28 December 1991, by German astronomer Freimut Börngen at Karl Schwarzschild Observatory in Tautenburg, eastern Germany.<ref name="MPC-Adamries" /> It was named after mathematician Adam Ries.<ref name="springer" />
== Classification and orbit ==
''Adamries'' is a member of the Nysa family, one of the prominent families of the inner main-belt, named after its namesake 44 Nysa. It orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,373 days). Its orbit has an eccentricity of 0.14 and an inclination of 4° with respect to the ecliptic.<ref name="jpldata" /> ''Adamries'' was first identified as {{mp|1977 BW}} at CrAO/Nauchnyj in 1977, extending the asteroid's observation arc by 15 years prior to its official discovery observation.<ref name="MPC-Adamries" />
== Physical characteristics ==
''Adamries'' has been characterized as a carbonaceous C-type asteroid by Pan-STARRS{{'}} photometric survey.<ref name="Veres-2015" /> It is also an assumed stony S-type asteroid.<ref name="lcdb" />
=== Lightcurve ===
In September 2013, rotational lightcurve of ''Adamries'' was obtained from photometric observation by astronomers at the Palomar Transient Factory in California. It showed a longer-than-average rotation period of {{val|22.8758}} hours with a brightness variation of 0.33 magnitude ({{small|U=2}}).<ref name="Waszczak-2016" />
=== Diameter and albedo ===
According to the survey carried out by NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, ''Adamries'' measures 4.2 kilometers in diameter and its surface has an albedo of 0.25, which is typical for stony asteroids.<ref name="Masiero-2012" /> CALL assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 3.6 kilometers with an absolute magnitude of 14.53.<ref name="lcdb" />
== Naming ==
This minor planet was named in honor of famous German mathematician Adam Ries (1492–1559), who wrote the first German arithmetic book in the 16th century, explaining in simple terms to the common people how to do arithmetic.<ref name="springer" />
At the time, this was considered to be difficult. This minor planet was the 100th numbered discovery of astronomer Freimut Börngen.<ref name="springer" /> The approved naming citation was published by the Minor Planet Center on 18 August 1997 {{small|(M.P.C. 30478)}}.<ref name="MPC-Circulars-Archive" /> This minor planet should not be confused with 236305 Adamriess, named after American astronomer and 2011 Nobel Prize winner Adam Riess.
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2016-08-27 last obs. |title = JPL Small-Body Database Browser: 7655 Adamries (1991 YM1) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007655 |publisher = Jet Propulsion Laboratory |access-date = 4 July 2017}}</ref>
<ref name="springer">{{cite book |title = Dictionary of Minor Planet Names – (7655) Adamries |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 608 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_6601 |chapter = (7655) Adamries }}</ref>
<ref name="MPC-Adamries">{{cite web |title = 7655 Adamries (1991 YM1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=7655 |access-date = 29 April 2016}}</ref>
<ref name="lcdb">{{cite LCDB|number = 7655 |access-date = 29 April 2016}}</ref>
<ref name="MPC-Circulars-Archive">{{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |access-date = 29 April 2016}}</ref>
<ref name="Masiero-2012">{{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. K. |last2 = Mainzer |first3 = T. |last3 = Grav |first4 = J. M. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = C. |last6 = Nugent |first7 = M. S. |last7 = Cabrera |date = November 2012 |title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M |journal = The Astrophysical Journal Letters |volume = 759 |issue = 1 |page = 5 |bibcode = 2012ApJ...759L...8M |doi = 10.1088/2041-8205/759/1/L8 |arxiv = 1209.5794 |access-date= 29 April 2016}}</ref>
<ref name="Waszczak-2016">{{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 29 April 2016}}</ref>
<ref name="Veres-2015">{{cite journal |display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 29 April 2016}}</ref>
}} <!-- end of reflist -->
== External links == * [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://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books * [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend * [https://www.minorplanetcenter.net/iau/lists/NumberedMPs005001.html Discovery Circumstances: Numbered Minor Planets (5001)-(10000)] – Minor Planet Center * {{AstDys|7655}} * {{JPL small body}}
{{Minor planets navigator |(7654) 1991 VV3 |number=7655 |7656 Joemontani}} {{Small Solar System bodies}} {{Authority control}}
{{DEFAULTSORT:Adamries}} 007655 Category:Discoveries by Freimut Börngen Category:Named minor planets 19911228