15268 Wendelinefroger

The S-type asteroid orbits the Sun in the inner main-belt at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,329 days). Its orbit has an eccentricity of 0.23 and an inclination of 3° with respect to the ecliptic. It was first identified as {{mp|1979 WA|7}} at Crimea–Nauchnij in 1979, extending the asteroid's observation arc by 11 years prior to its discovery.

In October 2008, a rotational lightcurve was obtained from photometric observations at the Leura Observatory ({{small|E17}}), Australia. It gave a rotation period of 2.422 hours with a low brightness variation of 0.07 magnitude, which indicates that the asteroid is of nearly spheroidal shape ({{small|U=3}}). The Collaborative Asteroid Lightcurve Link (CALL) assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.4 kilometer with an absolute magnitude of 14.7.

During the photometric observations in 2008, a minor-planet moon was also discovered, orbiting Wendelinefroger every {{val|25.07|0.02}} hours at a distance of 8.7 kilometers. Based on mutual occultations of Wendelinefroger and its moon, the diameter ratio for the two bodies is at least 0.24 (i.e. secondary-to-primary mean diameter ratio),{{efn|name=CBAT}} which translates into an estimated diameter of 0.8 kilometer or more for the asteroid's moon, using CALL's calculated diameter for the primary.

This minor planet is named in honour of Belgian female singer Wendeline Froger (born 1948), who has a soprano voice and performs at church celebrations, weddings and for selected audiences at her residence. She has a preference to sing Lieder by Robert Schumann, after whom the minor planet 4003 Schumann is named. The approved naming citation was published by the Minor Planet Center on 12 December 2008 ({{small|M.P.C. 64563}}).

{{notelist|refs=

{{efn|name=CBAT|1=Central Bureau for Astronomical Telegrams - No.1542, 20 October 2008
Photometric observations obtained between 24 September and 9 October 2008, showed that {{mp|15268 Wendelinefroger}} is a binary system with an orbital period of {{val|25.07|0.02}} hours. The primary has a rotation period of {{val|2.4224|0.0001}} hours, with a lightcurve brightness variation of 0.07 magnitude, indicating a nearly spheroidal shape. Mutual eclipse/occultation events give a lower limit on the D_s/D_p of 0.27 (i.e. a secondary-to-primary mean-diameter ratio).
Reported by – J. Oey, Leura Observatory, N.S.W., Australia; P. Pravec, P. Kusnirak, and K. Hornoch, Ondrejov Observatory; R. Stephens, Goat Mountain Astronomical Research Station, Yucca Valley, CA, U.S.A.; S. Gajdos and L. Kornos, Modra Observatory; and V. Chiorny, Institute of Astronomy, Kharkiv National University, {{URL|1=http://www.cbat.eps.harvard.edu/iau/cbet/001500/CBET001542.txt |2=Electronic Telegram No. 1542}}}}

}}

{{reflist|30em|refs=

{{cite web

|type = 2017-03-01 last obs.

|title = JPL Small-Body Database Browser: 15268 Wendelinefroger (1990 WF3)

|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015268

|publisher = Jet Propulsion Laboratory

|accessdate = 5 July 2017}}

{{cite book

|title = Dictionary of Minor Planet Names, Addendum to Fifth Edition: 2003–2005 – (15268) Wendelinefroger

|last = Schmadel | first = Lutz D.

|publisher = Springer Berlin Heidelberg

|page = 69

|date = 2009

|url = https://books.google.com/books?id=Ad4_AAAAQBAJ&pg=PA69

|isbn = 978-3-642-01964-7

}}

{{cite web

|title = 15268 Wendelinefroger (1990 WF3)

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=15268

|accessdate = 11 November 2016}}

{{cite web

|title = MPC/MPO/MPS Archive

|work = Minor Planet Center

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

|accessdate = 11 November 2016}}

{{cite web

|last1 = Johnston |first1=Robert

|title = (15268) Wendelinefroger

|url = http://www.johnstonsarchive.net/astro/astmoons/am-15268.html

|website = johnstonsarchive.net

|accessdate = 29 May 2015}}

{{cite web

|title = LCDB Data for (15268) Wendelinefroger

|publisher = Asteroid Lightcurve Database (LCDB)

|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=15268%7CWendelinefroger

|accessdate = 11 November 2016}}

{{Cite journal

|display-authors = 6

|first1 = J. |last1 = Oey

|first2 = P. |last2 = Pravec

|first3 = P. |last3 = Kusnirak

|first4 = K. |last4 = Hornoch

|first5 = R. |last5 = Stephens

|first6 = S. |last6 = Gajdos

|first7 = L. |last7 = Kornos

|first8 = V. |last8 = Chiorny

|date = October 2008

|title = (15268) 1990 WF3

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008CBET.1542....1O

|journal = Central Bureau Electronic Telegrams

|volume = 1542 |issue = 1542

|page = 1 |bibcode = 2008CBET.1542....1O

|access-date= 11 November 2016}}

{{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

|s2cid = 53493339 |access-date= 11 November 2016}}

}}

• [http://www.cbat.eps.harvard.edu/iau/cbet/001500/CBET001542.txt CBET 1542], Central Bureau for Astronomical Telegrams, 20 October 2008
• [http://www.johnstonsarchive.net/astro/asteroidmoons.html Asteroids with Satellites], Robert Johnston, johnstonsarchive.net
• [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/NumberedMPs015001.html Discovery Circumstances: Numbered Minor Planets (15001)-(20000) – Minor Planet Center]
• {{AstDys|15268}}
• {{JPL small body}}

{{Minor planets navigator |15267 Kolyma |number=15268 | }}

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015268

Category:Discoveries by Eric Walter Elst

Category:Named minor planets

015268

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