6433 Enya
{{Short description|Stony background asteroid from the inner regions of the asteroid belt}}
{{Use dmy dates|date=July 2018}}
{{Infobox planet
| minorplanet = yes
| name = 6433 Enya
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovered = 18 November 1978
| discoverer = A. Mrkos
| discovery_site = Kleť Obs.
| mpc_name = (6433) Enya
| alt_names = 1978 WC{{·}}1952 UH
{{mp|1989 WZ|4}}
| pronounced =
| named_after = Enya {{small|(Irish musician)}}
| mp_category = main-belt{{·}}{{small|(inner)}}
background
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 64.53 yr (23,568 days)
| aphelion = 2.9085 AU
| perihelion = 1.8673 AU
| semimajor = 2.3879 AU
| eccentricity = 0.2180
| period = 3.69 yr (1,348 days)
| mean_anomaly = 191.23°
| mean_motion = {{Deg2DMS|0.2671|sup=ms}} / day
| inclination = 8.6309°
| asc_node = 87.329°
| arg_peri = 317.28°
| dimensions = 3.68 km {{small|(calculated)}}
{{val|6.69|0.97}} km
{{val|7.08|1.79}} km
{{val|7.416|0.165}} km
| rotation = {{val|7.400|0.0064}} h
| albedo = {{val|0.06|0.04}}
{{val|0.081|0.012}}
{{val|0.090|0.025}}
0.20 {{small|(assumed)}}
| spectral_type = S
| abs_magnitude = 14.0{{·}}{{val|14.00|0.55}}{{·}}{{val|14.087|0.003}} {{small|(R)}}{{·}}14.10{{·}}14.3{{·}}14.37{{·}}14.54
}}
6433 Enya, provisional designation {{mp|1978 WC}}, is a stony background asteroid from the inner regions of the asteroid belt, approximately {{convert|7|km|mi|abbr=off|sp=us}} in diameter. It was discovered on 18 November 1978, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. It was named for Irish musician Enya.
Orbit and classification
Enya is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,348 days). Its orbit has an eccentricity of 0.22 and an inclination of 9° with respect to the ecliptic. Enya was first identified as {{mp|1952 UH}} at Goethe Link Observatory in 1952. The body's observation arc, however, begins with its official discovery observation at Kleť in 1978.
Physical characteristics
Enya is a presumed S-type asteroid.
= Rotation period =
In March 2013, a fragmentary rotational lightcurve of Enya was obtained from photometric observations at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 7.4 hours with a brightness variation of 0.08 magnitude ({{small|U=1}}).
As of 2017, no other lightcurve has since been obtained from Enya.
= Diameter and albedo =
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Enya measures between 6.69 and 7.416 kilometers in diameter, and its surface has an albedo between 0.012 and 0.090.
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.68 kilometers with an absolute magnitude of 14.54.
Naming
This minor planet was named after Eithne Pádraigín Ní Bhraonáin (born 1961), known as Enya, an Irish singer, songwriter, musician, and producer. Naming was proposed by G. V. Williams and published on 20 June 1997 ({{small|M.P.C. 30099}}).
References
{{reflist|30em|refs=
|type = 2017-05-02 last obs.
|title = JPL Small-Body Database Browser: 6433 Enya (1978 WC)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006433
|publisher = Jet Propulsion Laboratory
|access-date = 21 June 2017}}
|title = Dictionary of Minor Planet Names – (6433) Enya
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 532
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_5865 |chapter = (6433) Enya }}
|title = 6433 Enya (1978 WC)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=6433
|access-date = 15 March 2017}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 15 March 2017}}
|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 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T. IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
|s2cid = 118745497 |access-date= 15 March 2017}}
|title = LCDB Data for (6433) Enya
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=6433%7CEnya
|access-date = 15 March 2017}}
|display-authors = 6
|first1 = A. |last1 = Mainzer
|first2 = T. |last2 = Grav
|first3 = J. |last3 = Masiero
|first4 = E. |last4 = Hand
|first5 = J. |last5 = Bauer
|first6 = D. |last6 = Tholen
|first7 = R. S. |last7 = McMillan
|first8 = T. |last8 = Spahr
|first9 = R. M. |last9 = Cutri
|first10 = E. |last10 = Wright
|first11 = J. |last11 = Watkins
|first12 = W. |last12 = Mo
|first13 = C. |last13 = Maleszewski
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 25
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|arxiv = 1109.6407|s2cid = 35447010 }}
|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
|s2cid = 46350317 |access-date= 15 March 2017}}
|display-authors = 6
|first1 = C. R. |last1 = Nugent
|first2 = A. |last2 = Mainzer
|first3 = J. |last3 = Bauer
|first4 = R. M. |last4 = Cutri
|first5 = E. A. |last5 = Kramer
|first6 = T. |last6 = Grav
|first7 = J. |last7 = Masiero
|first8 = S. |last8 = Sonnett
|first9 = E. L. |last9 = Wright
|date = September 2016
|title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos
|journal = The Astronomical Journal
|volume = 152
|issue = 3
|page = 12
|bibcode = 2016AJ....152...63N
|doi = 10.3847/0004-6256/152/3/63
|arxiv = 1606.08923
|doi-access = free }}
|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
|s2cid = 8342929 |access-date= 15 March 2017}}
|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= 15 March 2017}}
}}
External links
- [https://www.minorplanetcenter.net/iau/special/rocknroll/0006433.html About (6433) Enya], Rock & Roll Minor Planets, Minor Planet Center
- [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|6433}}
- {{JPL small body}}
{{Minor planets navigator |6432 Temirkanov |number=6433 |6434 Jewitt}}
{{Small Solar System bodies}}
{{Enya}}
{{Authority control}}
{{DEFAULTSORT:Enya}}