1825 Klare
{{Short description|Background asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1825 Klare
| background = #D6D6D6
| image = 001825-asteroid shape model (1825) Klare.png
| image_scale =
| caption = Shape model of Klare from its lightcurve
| discovered = 31 August 1954
| discoverer = K. Reinmuth
| discovery_site = Heidelberg Obs.
| mpc_name = (1825) Klare
| alt_names = 1954 QH{{·}}1934 CH
{{mp|1952 DW|2}}{{·}}1954 SB
1954 SF{{·}}{{mp|1954 UF|1}}
1969 AV
| named_after = Gerhard Klare {{small|(German astronomer)}}
| mp_category = main-belt{{·}}{{small|(middle)}}
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 83.12 yr (30,360 days)
| aphelion = 2.9839 AU
| perihelion = 2.3702 AU
| semimajor = 2.6771 AU
| eccentricity = 0.1146
| period = 4.38 yr (1,600 days)
| mean_anomaly = 71.010°
| mean_motion = {{Deg2DMS|0.2250|sup=ms}} / day
| inclination = 4.0342°
| asc_node = 288.67°
| arg_peri = 142.57°
| dimensions = {{val|14.69|0.82}} km
19.21 km {{small|(calculated)}}
| rotation = {{val|4.7410|0.0001}} h{{efn|name=Hamanowa}}
{{val|4.74173|0.00007}} h
{{val|4.7421|0.0001}} h
{{val|4.74288|0.00005}} h
{{val|4.742885|0.000001}} h
{{val|4.7429|0.0003}} h
{{val|4.7431|0.0001}} h
{{val|4.744|}} h
| albedo = 0.10 {{small|(assumed)}}
{{val|0.167|0.021}}
| spectral_type = S/C
| abs_magnitude = 11.7{{·}}11.80{{·}}{{val|11.91|0.24}}
}}
1825 Klare (prov. designation: {{mp|1954 QH}}) is a background asteroid from the central region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 31 August 1954, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. The asteroid was named after Heidelberg astronomer Gerhard Klare.
Orbit and classification
The presumably stony asteroid orbits the Sun in the central main-belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,600 days). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic. First identified as {{mp|1934 CH}} at Uccle Observatory in 1934, Klare{{'}}s observation arc begins 20 years prior to its official discovery observation.
Naming
Klare was named after Gerhard Klare (born 1932), an observing astronomer at Heidelberg Observatory since 1960, whose fields of interest include minor planets. He is also known for his numerous contributions in the yearbook series "Reviews in Modern Astronomy" of the Astronomische Gesellschaft. The official {{MoMP|1825|naming citation}} was published by the Minor Planet Center on 18 April 1977 ({{small|M.P.C. 4156}}).
Physical characteristics
= Rotation period =
Klare has been the subject of multiple photometric lightcurve studies, which gave a well-determined rotation period between 4.741 and 4.744 hours with a brightness variation between 0.70 and 0.90 magnitude ({{small|U=3/n.a.}}). Measurements have also been used as the basis for generating a three-dimensional model of its shape. The Collaborative Asteroid Lightcurve Link (CALL) adopts a period 4.744 hours with an amplitude of 0.70 magnitude ({{small|U=3}}).
= Diameter and albedo =
According to the survey carried out by the Japanese Akari satellite, Klare measures 14.69 kilometers in diameter, and its surface has an albedo of 0.167, while CALL assumes an albedo of 0.10 – a compromise value for asteroids with a semi-major axis between 2.6 and 2.7 AU, for which neither a S (0.20) nor a C (0.057) type has been determined – and calculates a diameter of 19.21 kilometers with an absolute magnitude of 11.7.
Notes
{{notelist|refs=
{{efn|name=Hamanowa|1=Hamanowa 2011, web publication, summary figures given in the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1825%7CKlare Light Curve Data Base – (1825) Klare]}}
}}
References
{{reflist|30em|refs=
|type = 2017-03-29 last obs.
|title = JPL Small-Body Database Browser: 1825 Klare (1954 QH)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001825
|publisher = Jet Propulsion Laboratory
|accessdate = 8 June 2017}}
|title = Dictionary of Minor Planet Names – (1825) Klare
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 146
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_1826 |chapter = (1825) Klare }}
|title = 1825 Klare (1954 QH)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1825
|accessdate = 15 December 2016}}
|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008)
|chapter = Appendix – Publication Dates of the MPCs
|last = Schmadel |first=Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 221
|isbn = 978-3-642-01964-7
|doi = 10.1007/978-3-642-01965-4}}
|title = Asteroids and comets rotation curves – (1825) Klare
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page4cou.html#001825
|accessdate = 15 December 2016}}
|title = LCDB Data for (1825) Klare
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1825%7CKlare
|accessdate = 15 December 2016}}
|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=1825 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
|author = Pray, Donald P.
|date = June 2004
|title = Lightcurve analysis of asteroids 110, 196, 776, 804, and 1825
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004MPBu...31...34P
|journal = The Minor Planet Bulletin
|volume = 31
|issue = 2
|pages = 34–36
|issn = 1052-8091
|bibcode = 2004MPBu...31...34P
|access-date= 15 December 2016}}
|author = Clark, Maurice
|date = September 2006
|title = Lightcurve results for 383 Janina, 899 Jokaste, 1825 Klare, 2525 O'Steen 5064 Tanchozuru, and (17939) 1999 HH8
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...53C
|journal = The Minor Planet Bulletin
|volume = 33
|issue = 3
|pages = 53–56
|issn = 1052-8091
|bibcode = 2006MPBu...33...53C
|access-date= 15 December 2016}}
|author = Galad, Adrian
|date = September 2008
|title = Part of Simple Lightcurves from Modra (October 2007- February 2008)
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..128G
|journal = The Minor Planet Bulletin
|volume = 35
|issue = 3
|pages = 128–132
|issn = 1052-8091
|bibcode = 2008MPBu...35..128G
|access-date= 15 December 2016}}
|first1 = Mahfuz |last1 = Krueng
|first2 = Maurice |last2 = Clark
|date = April 2014
|title = Shaping a 3-D Model of Asteroid 1825 Klare
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41...86K
|journal = The Minor Planet Bulletin
|volume = 41
|issue = 2
|pages = 86–89
|issn = 1052-8091
|bibcode = 2014MPBu...41...86K
|access-date= 15 December 2016}}
|display-authors = 6
|first1 = J. |last1 = Hanus
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|bibcode = 2016A&A...586A.108H
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|arxiv = 1510.07422}}
|first1 = J. |last1 = Durech
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|access-date= 15 December 2016}}
|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
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|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= 15 December 2016}}
}}
External links
- [http://www.phys.ttu.edu/~ozprof/mahfuz_project.pptx PowerPoint presentation] – Asteroid 1825 Klare, by Mahfuz Krueng
- [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/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|1825}}
- {{JPL small body}}
{{Minor planets navigator |1824 Haworth |number=1825 |1826 Miller}}
{{Small Solar System bodies}}
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{{DEFAULTSORT:Klare}}