716 Berkeley
{{Short description|Background asteroid}}
{{Use dmy dates|date=June 2020}}
{{Infobox planet
| minorplanet = yes
| name = 716 Berkeley
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = J. Palisa
| discovery_site = Vienna Obs.
| discovered = 30 July 1911
| mpc_name = (716) Berkeley
| pronounced = {{IPAc-en|'|b|ɜːr|k|l|iː}}
| alt_names = A911 OC{{·}}1947 CH
1952 FA{{·}}A906 OB
1911 MD
| named_after = Berkeley
{{small|(U.S. City, California)}}
| mp_category = {{plainlist|
- {{nowrap|main-belt{{·}}{{small|(middle)}}}}
- background
}}
| epoch = 31 May 2020 (JD 2459000.5)
| uncertainty = 0
| observation_arc = 113.32 yr (41,390 d)
| aphelion = 3.0557 AU
| perihelion = 2.5682 AU
| semimajor = 2.8120 AU
| eccentricity = 0.0867
| period = 4.72 yr (1,722 d)
| mean_anomaly = 136.21°
| mean_motion = {{Deg2DMS|0.2090|sup=ms}} / day
| inclination = 8.4872°
| asc_node = 145.89°
| arg_peri = 56.811°
| mean_diameter = {{plainlist|
}}
| rotation = {{val|15.55|0.04|ul=h}}{{efn|name=lcdb-Garlitz-2011}}
| albedo = {{plainlist|
}}
| spectral_type = {{plainlist|
}}
| abs_magnitude = {{plainlist|
}}
716 Berkeley (prov. designation: {{mp|A911 OC}} or {{mp|1911 MD}}) is a background asteroid from the central regions of the asteroid belt. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 30 July 1911. The stony S-type asteroid has a rotation period of 15.6 hours and measures approximately {{convert|21|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was named after the city of Berkeley, California, where the discoverer's colleague Armin Otto Leuschner (1868–1953) was the director of the local observatory.
Orbit and classification
Berkeley is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the central asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 9 months (1,722 days; semi-major axis of 2.81 AU). Its orbit has an eccentricity of 0.09 and an inclination of 8° with respect to the ecliptic. The body's observation arc begins with its first observation at Heidelberg on 16 July 1906, five years prior to its official discovery observation by Johann Palisa at Vienna.
Naming
According to Alexander Schnell, this minor planet was named by the discoverer after the U.S. city of Berkeley in California, where American astronomer and colleague Armin Otto Leuschner (1868–1953) was a long-time director at the Leuschner Observatory (then called Students' Observatory). Known for his books Celestial Mechanics and The Minor Planets of the Hecuba Group, Leuschner worked on the orbit determination of 719 Albert, which was originally discovered by Palisa in 1911 but remained a lost asteroid until 2000. The naming citation was not mentioned in The Names of the Minor Planets by Paul Herget in 1955. Palisa also named asteroid 718 Erida after Leuschner's daughter. The lunar crater Leuschner and asteroid 1361 Leuschneria, discovered by Eugène Delporte in 1935, were later named directly after the American astronomer.
Physical characteristics
In both the Tholen and SMASS classification, Berkeley is a common, stony S-type asteroid. It is also an S-type in the Bus–DeMeo classification, while in the Tholen- and SMASS-like taxonomic variants of the Small Solar System Objects Spectroscopic Survey (S3OS2), this asteroid is a K-type and Sq-subtype which transitions to the uncommon Q-type, respectively.
= Rotation period =
In May 2009, a rotational lightcurve of Berkeley was obtained from photometric observations by American amateur astronomer Joe Garlitz at his Elgin Observatory in Oregon. Lightcurve analysis gave a rotation period of {{val|15.55|0.04}} hours with a brightness variation of {{val|0.25|0.03}} magnitude ({{small|U=2+}}).{{efn|name=lcdb-Garlitz-2011}} Lower rated lightcurves obtained by Claes-Ingvar Lagerkvist in 1977, and by David Romeuf in 2018, gave a divergent period of larger than {{val|17|u=h}} and {{val|34.3|0.6|u=h}} with an amplitude of larger than {{val|0.2}} and {{val|0.25|0.02}} magnitude, respectively ({{small|U=1/2}}).
= Diameter and albedo =
According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Berkeley measures ({{val|19.768|0.167}}), ({{val|21.28|1.5}}) and ({{val|21.55|0.57}}) kilometers in diameter and its surface has an albedo of ({{val|0.220|0.045}}), ({{val|0.1801|0.028}}) and ({{val|0.182|0.011}}), respectively.
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2027 and a diameter of 21.38 kilometers based on an absolute magnitude of 10.7. Alternative mean-diameters published by the WISE team include ({{val|21.519|0.054|u=km}}) and ({{val|21.89|0.78|u=km}}) with a corresponding albedo of ({{val|0.1808|0.0518}}) and ({{val|0.170|0.017}}).
Notes
{{notelist|refs=
{{efn|name=lcdb-Garlitz-2011|1=[https://users.eoni.com/~garlitzj/Asteroid_Occltn/716Berkeley.jpg Lightcurve plot of (716) Berkeley]. Rotation period {{val|15.577}} hours by Joe Garlitz (2009). Quality code is 2+. Summary figures at the [http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=716 LCDB] and [https://users.eoni.com/~garlitzj/ J. Garlitz] ([https://web.archive.org/web/20150307232555/http://users.eoni.com/~garlitzj/ archived]) websites.}}
}}
References
{{reflist|30em|refs=
|type = 2019-11-10 last obs.
|title = JPL Small-Body Database Browser: 716 Berkeley (A911 OC)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000716
|publisher = Jet Propulsion Laboratory
|access-date = 16 June 2020}}
|title = Dictionary of Minor Planet Names
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|chapter = (716) Berkeley
|page = 69
|date = 2007
|doi = 10.1007/978-3-540-29925-7_717
|isbn = 978-3-540-00238-3}}
|title = 716 Berkeley (A911 OC)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=716
|access-date = 16 June 2020}}
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = T. |last2 = Grav
|first3 = A. K. |last3 = Mainzer
|first4 = C. R. |last4 = Nugent
|first5 = J. M. |last5 = Bauer
|first6 = R. |last6 = Stevenson
|first7 = S. |last7 = Sonnett
|date = August 2014
|title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos
|journal = The Astrophysical Journal
|volume = 791
|issue = 2
|page = 11
|bibcode = 2014ApJ...791..121M
|doi = 10.1088/0004-637X/791/2/121
|arxiv = 1406.6645|s2cid = 119293330 }}
|title = LCDB Data for (716) Berkeley
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=716
|access-date = 16 June 2020}}
|title = Asteroids and comets rotation curves – (716) Berkeley
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page2cou.html#000716
|access-date = 15 June 2020}}
|display-authors = 6
|first1 = A. K. |last1 = Mainzer
|first2 = J. M. |last2 = Bauer
|first3 = R. M. |last3 = Cutri
|first4 = T. |last4 = Grav
|first5 = E. A. |last5 = Kramer
|first6 = J. R. |last6 = Masiero
|first7 = C. R. |last7 = Nugent
|first8 = S. M. |last8 = Sonnett
|first9 = R. A. |last9 = Stevenson
|first10 = E. L. |last10 = Wright
|date = June 2016
|title = NEOWISE Diameters and Albedos V1.0
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab
|journal = NASA Planetary Data System
|pages = EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 |bibcode = 2016PDSS..247.....M
|access-date= 16 June 2020}}
|display-authors = 6
|first1 = Fumihiko |last1 = Usui
|first2 = Daisuke |last2 = Kuroda
|first3 = Thomas G. |last3 = Müller
|first4 = Sunao |last4 = Hasegawa
|first5 = Masateru |last5 = Ishiguro
|first6 = Takafumi |last6 = Ootsubo
|first7 = Daisuke |last7 = Ishihara
|first8 = Hirokazu |last8 = Kataza
|first9 = Satoshi |last9 = Takita
|first10 = Shinki |last10 = Oyabu
|first11 = Munetaka |last11 = Ueno
|first12 = Hideo |last12 = Matsuhara
|first13 = Takashi |last13 = Onaka
|date = October 2011
|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
|journal = Publications of the Astronomical Society of Japan
|volume = 63
|issue = 5
|pages = 1117–1138
|bibcode = 2011PASJ...63.1117U
|doi = 10.1093/pasj/63.5.1117
|doi-access=
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=716 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
|first1 = E. F. |last1 = Tedesco
|first2 = P. V. |last2 = Noah
|first3 = M. |last3 = Noah
|first4 = S. D. |last4 = Price
|date = October 2004
|title = IRAS Minor Planet Survey V6.0
|url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab
|journal = NASA Planetary Data System
|volume = 12
|pages = IRAS-A-FPA-3-RDR-IMPS-V6.0
|bibcode = 2004PDSS...12.....T
|access-date = 16 June 2020}}
|author = Lagerkvist, C.-I.
|date = December 1977
|title = Photographic Photometry of the Asteroids 716 Berkeley and 1245 Calvinia
|journal = Astronomy and Astrophysics Supplement
|volume = 34
|pages = 203
|bibcode = 1978A&AS...34..203L}}
|title = Asteroid 716 Berkeley
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=716+Berkeley
|access-date = 16 June 2020}}
|title = Asteroid 716 Berkeley – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=716
|access-date= 16 June 2020}}
|last1 = Zappalà |first1 = V.
|last2 = Bendjoya |first2 = Ph.
|last3 = Cellino |first3 = A.
|last4 = Farinella |first4 = P.
|last5 = Froeschle |first5 = C.
|date = 1997
|title = Asteroid Dynamical Families
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_5_DDR_FAMILY_V4_1/data/family.tab
|journal = NASA Planetary Data System
|pages = EAR-A-5-DDR-FAMILY-V4.1
|access-date = 16 June 2020}}} ([https://sbn.psi.edu/pds/resource/family.html PDS main page])
|first1 = D. |last1 = Lazzaro
|first2 = C. A. |last2 = Angeli
|first3 = J. M. |last3 = Carvano
|first4 = T. |last4 = Mothé-Diniz
|first5 = R. |last5 = Duffard
|first6 = M. |last6 = Florczak
|date = November 2004
|title = S3OS2: the visible spectroscopic survey of 820 asteroids
|url = http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf
|journal = Icarus
|volume = 172
|issue = 1
|pages = 179–220
|bibcode = 2004Icar..172..179L
|doi = 10.1016/j.icarus.2004.06.006
|access-date= 16 June 2020}}
}}
External links
- [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at www.minorplanet.info
- [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] – Geneva Observatory, Raoul Behrend
- [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|716}}
- {{JPL small body}}
{{Minor planets navigator |715 Transvaalia |number=716 |717 Wisibada}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Berkeley}}