:4176 Sudek

{{Infobox planet

| minorplanet = yes

| name = 4176 Sudek

| background = #D6D6D6

| image =

| image_size =

| caption =

| discovery_ref =

| discoverer = A. Mrkos

| discovery_site = Kleť Obs.

| discovered = 24 February 1987

| mpc_name = (4176) Sudek

| alt_names = 1987 DS{{·}}{{mp|1949 FF|1}}
1952 VC{{·}}{{mp|1974 TC|1}}
{{mp|1979 SX|5}}{{·}}1982 FO

| pronounced =

| named_after = Josef Sudek
{{small|(Czech photographer)}}

| mp_category = main-belt{{·}}{{small|(outer)}}
Themis

| orbit_ref =

| epoch = 23 March 2018 (JD 2458200.5)

| uncertainty = 0

| observation_arc = 64.97 yr (23,731 d)

| aphelion = 3.5436 AU

| perihelion = 2.6582 AU

| semimajor = 3.1009 AU

| eccentricity = 0.1428

| period = 5.46 yr (1,994 d)

| mean_anomaly = 275.67°

| mean_motion = {{Deg2DMS|0.1805|sup=ms}} / day

| inclination = 2.5994°

| asc_node = 114.33°

| arg_peri = 356.06°

| mean_diameter = {{val|14.51|3.83|ul=km}}
{{val|15.86|u=km}} {{small|(calculated)}}
{{val|17.87|0.77|u=km}}
{{val|17.96|2.11|u=km}}
{{val|18.858|0.243|u=km}}

| rotation = {{val|8.164|0.0092|ul=h}}

| albedo = {{val|0.08}} {{small|(assumed)}}
{{val|0.095|0.019}}
{{val|0.095|0.033}}
{{val|0.097|0.009}}
{{val|0.12|0.11}}

| spectral_type = C {{small|(assumed)}}

| abs_magnitude = 11.8
11.90
{{val|11.909|0.002}} {{small|(R)}}
12.0
{{val|12.19|0.18}}
12.36

}}

4176 Sudek, provisional designation {{mp|1987 DS}}, is a Themistian asteroid from the outer regions of the asteroid belt, approximately {{convert|17|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 24 February 1987, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. The presumed C-type asteroid has a rotation period of 8.16 hours. It was named in memory of Czech photographer Josef Sudek.

Orbit and classification

Sudek is a Themistian asteroid that belongs to the Themis family ({{small|602}}), a very large family of carbonaceous asteroids, named after 24 Themis.

It orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 6 months (1,994 days; semi-major axis of 3.1 AU). Its orbit has an eccentricity of 0.14 and an inclination of 3° with respect to the ecliptic. The asteroid was first observed as {{mp|1949 FF|1}} at Simeiz Observatory in March 1949. The body's observation arc begins with its observation as {{mp|1952 VC}} at Goethe Link Observatory in November 1952.

= Occultation =

On 21 January 2014 Sudek, at magnitude 15.5, occulted the star 2UCAC 39655315 in the constellation Gemini during which the magnitude dropped from 11.8 (star) to 15.5 (asteroid). This event was visible over parts of Japan and China.

Physical characteristics

Sudek is an assumed carbonaceous C-type asteroid, in line with the Themis family's overall spectral type.{{rp|23}}

= Rotation period =

In September 2012, a rotational lightcurve of Sudek was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 8.164 hours with a brightness amplitude of 0.32 magnitude ({{small|U=2}}).

= Diameter and albedo =

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Sudek measures between 14.51 and 18.858 kilometers in diameter and its surface has an albedo between 0.095 and 0.12.

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 15.86 kilometers based on an absolute magnitude of 12.36.

Naming

Based on a proposal by Miloš Tichý, this minor planet was named after Czech photographer Josef Sudek (1896–1976), known for his black-and-white series of still lifes and panoramas of Prague. The official naming citation was published by the Minor Planet Center on 11 February 1998 ({{small|M.P.C. 31295}}).

References

{{reflist|30em|refs=

{{cite web

|type = 2017-11-02 last obs.

|title = JPL Small-Body Database Browser: 4176 Sudek (1987 DS)

|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004176

|archive-url = https://web.archive.org/web/20200916070446/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004176

|archive-date = 16 September 2020

|publisher = Jet Propulsion Laboratory

|access-date = 27 April 2018}}

{{cite web

|title = 4176 Sudek (1987 DS)

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=4176

|access-date = 27 April 2018}}

{{cite web

|title = MPC/MPO/MPS Archive

|work = Minor Planet Center

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

|access-date = 27 April 2018}}

{{cite journal

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|first3 = T. |last3 = Grav

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|bibcode = 2011ApJ...741...68M

|doi = 10.1088/0004-637X/741/2/68

|arxiv = 1109.4096

}}

{{cite web

|title = (4176) Sudek – asteroid occultation

|first1 = Steve

|last1 = Preston

|website = www.asteroidoccultation.com

|url = http://www.asteroidoccultation.com/2014_01/0121_4176_34119.htm

|archive-url = https://web.archive.org/web/20140201155302/http://www.asteroidoccultation.com/2014_01/0121_4176_34119.htm

|archive-date= 1 February 2014}}

{{cite web

|title = Asteroid 4176 Sudek – Nesvorny HCM Asteroid Families V3.0

|work = Small Bodies Data Ferret

|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4176+Sudek#Asteroid%204176%20SudekEAR-A-VARGBDET-5-NESVORNYFAM-V3.0

|access-date = 27 October 2019}}

{{Cite book

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|date = December 2014

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|pages = 297–321

|bibcode = 2015aste.book..297N

|doi = 10.2458/azu_uapress_9780816532131-ch016

|arxiv = 1502.01628

|isbn = 9780816532131

}}

{{cite web

|title = LCDB Data for (4176) Sudek

|publisher = Asteroid Lightcurve Database (LCDB)

|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4176%7CSudek

|access-date = 27 April 2018}}

{{cite journal

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|date = October 2011

|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey

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|doi-access= free

}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=4176 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])

{{cite journal

|display-authors = 6

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|date = December 2015

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{{cite journal

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{{cite journal

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{{cite journal

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{{cite journal

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|first1 = Peter |last1 = Veres

|first2 = Robert |last2 = Jedicke

|first3 = Alan |last3 = Fitzsimmons

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|first6 = Bryce |last6 = Bolin

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}}

External links

[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
[https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
{{AstDys|4176}}
{{JPL small body}}

{{Minor planets navigator |4175 Billbaum |number=4176 |4177 Kohman}}

004176

Category:Discoveries by Antonín Mrkos

Category:Named minor planets

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