11118 Modra
{{Short description|Main-belt Flora asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 11118 Modra
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovered = 9 August 1996
| discoverer = A. Galád
D. Kalmančok
| discovery_site = Modra Obs.
| mpc_name = (11118) Modra
| alt_names = 1996 PK{{·}}{{mp|1991 FL|1}}
| named_after = Modra
{{small|(town and observatory)}}
| mp_category = main-belt{{·}}Flora
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 25.44 yr (9,291 days)
| aphelion = 2.5052 AU
| perihelion = 2.1225 AU
| semimajor = 2.3139 AU
| eccentricity = 0.0827
| period = 3.52 yr (1,286 days)
| mean_anomaly = 139.39°
| mean_motion = {{Deg2DMS|0.2800|sup=ms}} / day
| inclination = 3.0326°
| asc_node = 7.4717°
| arg_peri = 204.63°
| dimensions = 3.74 km {{small|(calculated)}}
{{val|8.69|3.13}} km
| rotation = {{val|27.12|0.02}} h
{{val|27.1481|0.0409}} h
| albedo = {{val|0.054|0.105}}
0.24 {{small|(assumed)}}
| abs_magnitude = 14.3{{·}}{{val|14.211|0.005}} {{small|(R)}}{{·}}{{val|14.17|0.36}}{{·}}14.10
}}
11118 Modra (provisional designation {{mp|1996 PK}}) is a Flora asteroid of uncertain composition from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.
It was discovered on 9 August 1996, by Slovak astronomers Adrián Galád and Dušan Kalmančok at the Modra Observatory in Slovakia, and named for the town Modra where the discovering observatory is located.
Classification and orbit
Modra is a member of the Flora family, one of the largest families of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 2.1–2.5 AU once every 3 years and 6 months (1,286 days). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic. A first precovery was taken at ESO's La Silla Observatory in 1991, extending the asteroid's observation arc by 5 years prior to its discovery.
Rotation period
In September 2010, a photometric lightcurve analysis of Modra by American astronomer Brian Warner at his Palmer Divide Observatory, Colorado, rendered an unambiguous period of {{val|27.12|0.02}} hours with a brightness variation of 0.53 in magnitude ({{small|U=3}}). A second lightcurve obtained during the wide-field survey at the U.S. Palomar Transient Factory in August 2010, and gave a period of {{val|27.1481|0.0409}} hours with an amplitude of 0.42 ({{small|U=2}}).
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the asteroid has a low albedo of 0.05. In agreement, the large-scale survey by Pan-STARRS (PS1) rates it as a dark carbonaceous body. However, the Collaborative Asteroid Lightcurve Link (CALL) assumes a much higher albedo of 0.24 – derived from 8 Flora, the orbital family's largest member and namesake – and groups it to the S-type asteroid. The different albedos of the two spectral classes also translate into divergent estimates for the body's diameter. While CALL calculates 3.7 kilometers, NASA's space-based survey inferred a much larger diameter of 8.7 kilometers.
Naming
This minor planet was named after both the small historical town of Modra, located in the Bratislava Region of Slovakia, and the Modra Observatory of the Institute of Astronomy at Comenius University, where this asteroid had been discovered. The approved naming citation was published by the Minor Planet Center on 28 September 1999 ({{small|M.P.C. 36130}}).
References
{{reflist|30em|refs=
|type = 2016-08-23 last obs.
|title = JPL Small-Body Database Browser: 11118 Modra (1996 PK)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011118
|publisher = Jet Propulsion Laboratory
|accessdate = 5 July 2017}}
|title = Dictionary of Minor Planet Names – (11118) Modra
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 753
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_8231 |chapter = (11118) Modra }}
|title = 11118 Modra (1996 PK)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=11118
|accessdate = 25 January 2016}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = 17 May 2016}}
|title = LCDB Data for (11118) Modra
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=11118%7CModra
|accessdate = 17 May 2016}}
|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= 17 May 2016}}
|author = Warner, Brian D.
|date = April 2011
|title = Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 September-December
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...82W
|journal = The Minor Planet Bulletin
|volume = 38
|issue = 2
|pages = 82–86
|issn = 1052-8091
|bibcode = 2011MPBu...38...82W
|access-date= 17 May 2016}}
|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= 17 May 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
|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= 17 May 2016}}
}}
External links
- {{YouTube|id=3Kn3s98KRYw|title=The Palmer Divide Observatory: Tour given by Brian Warner}} {{small|(time 4:03 min.)}}
- [http://www.minorplanetobserver.com/pdolc/A11118_2010.HTM Lightcurve plot of 11118 Modra], Palmer Divide Observatory, B. D. Warner (2010)
- [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/NumberedMPs010001.html Discovery Circumstances: Numbered Minor Planets (10001)-(15000)] – Minor Planet Center
- {{AstDys|11118}}
- {{JPL small body}}
{{Minor planets navigator |(11117) 1996 LP1 |number=11118 |11119 Taro}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Modra}}
Category:Discoveries by Adrián Galád