1604 Tombaugh
{{Short description|Type Eos asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1604 Tombaugh
| background = #D6D6D6
| image = 001604-asteroid shape model (1604) Tombaugh.png
| image_scale =
| caption = Shape model of Tombaugh from its lightcurve
| discovered = 24 March 1931
| discoverer = C. O. Lampland
| discovery_site = Lowell Obs.
| mpc_name = (1604) Tombaugh
| alt_names = 1931 FH{{·}}1930 DX
{{mp|1933 SA|1}}{{·}}1936 FA
1937 JH{{·}}1941 CF
1943 OE{{·}}1948 ME
{{mp|1949 ST|1}}{{·}}A920 EC
| named_after = Clyde Tombaugh
{{small|(astronomer)}}
| mp_category = main-belt{{·}}Eos
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 96.51 yr (35,252 days)
| aphelion = 3.3309 AU
| perihelion = 2.7161 AU
| semimajor = 3.0235 AU
| eccentricity = 0.1017
| period = 5.26 yr (1,920 days)
| mean_anomaly = 359.39°
| mean_motion = {{Deg2DMS|0.1875|sup=ms}} / day
| inclination = 9.3941°
| asc_node = 309.10°
| arg_peri = 38.199°
| dimensions = {{val|28.78|0.53}} km
32.25 km {{small|(derived)}}
{{val|32.33|2.2}} km {{small|(IRAS:3)}}
| rotation = {{val|6.15}} h {{small|(dated)}}
{{val|7.04}} h {{small|(dated)}}
{{val|7.047|0.004}} h
{{val|7.056|0.001}} h
{{val|8.2}} h {{small|(dated)}}
| albedo = 0.0933 {{small|(derived)}}
{{val|0.1038|0.016}} {{small|(IRAS:3)}}
{{val|0.138|0.006}}
| spectral_type = B–V = 0.751
U–B = 0.373
XSCU {{small|(Tholen)}}{{·}}Xc {{small|(SMASS)}}{{·}}X
| abs_magnitude = 10.4{{·}}10.53{{·}}10.65{{·}}{{val|10.93|0.15}}
}}
1604 Tombaugh, provisional designation {{mp|1931 FH}}, is a rare-type Eos asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 24 March 1931, by American astronomer Carl Otto Lampland at Lowell Observatory in Flagstaff, Arizona, in the United States. It was named after the discoverer of Pluto, Clyde Tombaugh.
Classification and orbit
Tombaugh is a member of the Eos family that orbits the Sun in the outer main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,920 days). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. Its observation arc begins at Flagstaff, one year prior to its official discovery observation at Lowell Observatory. It had been previously identified at Heidelberg as {{mp|A920 EC}} in 1920, and as {{mp|1930 DX}} in 1930.
Physical characteristics
Tombaugh is classified as an X-type asteroid. It is also classified as a rare XSCU type in the Tholen, and as a transitional Xc type in the SMASS taxonomy.
= Rotation period =
In April 2010 and November 2012, rotational lightcurves of Tombaugh were obtained from photometric observations at Oakley Southern Sky Observatory, Australia, and at Bassano Bresciano Observatory, Italy. Lightcurve analysis gave a rotation period of 7.047 and 7.056 hours with a brightness variation of 0.16 and 0.35 magnitude, respectively ({{small|U=2+/2+}}).
These periods supersede previous results obtained by astronomers Claes-Ingvar Lagerkvist (1975), Richard P. Binzel (1984) and Krisztián Sárneczky ({{small|U=1/2/2}}).
= Diameter and albedo =
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Tombaugh measures 28.78 and 32.33 kilometers in diameter, and its surface has an albedo of 0.138 and 0.104, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0933 and a diameter of 32.25 kilometers with an absolute magnitude of 10.65.
Naming
This minor planet was named for American astronomer Clyde Tombaugh (1906–1997), famous for his discovery of Pluto in 1930. The discovering Lowell Observatory named this asteroid on the occasion of a symposium on Pluto, held in 1980. When Tombaugh examined the photographic plates during the trans-Saturnian search program at the Lowell Observatory, he also marked over 4,000 minor planets on these plates. The approved naming citation was published by the Minor Planet Center on 1 April 1980 ({{small|M.P.C. 5280}}).
References
{{reflist|refs=
|type = 2016-09-14 last obs.
|title = JPL Small-Body Database Browser: 1604 Tombaugh (1931 FH)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001604
|publisher = Jet Propulsion Laboratory
|accessdate = 30 June 2017}}
|title = Dictionary of Minor Planet Names – (1604) Tombaugh
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 127
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_1605 |chapter = (1604) Tombaugh }}
|title = 1604 Tombaugh (1931 FH)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1604
|accessdate = 29 December 2016}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = 29 December 2016}}
|title = LCDB Data for (1604) Tombaugh
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1604%7CTombaugh
|accessdate = 29 December 2016}}
|first1 = E. F. |last1 = Tedesco
|first2 = P. V. |last2 = Noah
|first3 = M. |last3 = Noah
|first4 = S. D. |last4 = Price
|date = October 2004
|title = IRAS Minor Planet Survey V6.0
|url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab
|journal = NASA Planetary Data System
|volume = 12
|pages = IRAS-A-FPA-3-RDR-IMPS-V6.0
|bibcode = 2004PDSS...12.....T
|accessdate = 22 October 2019}}
|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= free
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1604 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
|author = Lagerkvist, C.-I.
|date = March 1978
|title = Photographic photometry of 110 main-belt asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978A&AS...31..361L
|journal = Astronomy and Astrophysics Supplement Series
|volume = 31
|pages = 361–381
|bibcode = 1978A&AS...31..361L
|access-date= 29 December 2016}}
|author = Binzel, R. P.
|date = October 1987
|title = A photoelectric survey of 130 asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B
|journal = Icarus
|volume = 72
|issue = 1
|pages = 135–208
|issn = 0019-1035
|bibcode = 1987Icar...72..135B
|doi = 10.1016/0019-1035(87)90125-4
|access-date= 29 December 2016}}
|first1 = K. |last1 = Sárneczky
|first2 = Gy. |last2 = Szabó
|first3 = L. L. |last3 = Kiss
|date = June 1999
|title = CCD observations of 11 faint asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999A&AS..137..363S
|journal = Astronomy and Astrophysics Supplement
|volume = 137
|issue = 2
|pages = 363–368
|bibcode = 1999A&AS..137..363S
|doi = 10.1051/aas:1999251
|access-date= 29 December 2016|doi-access= free
}}
|display-authors = 6
|first1 = Kenda |last1 = Albers
|first2 = Katherine |last2 = Kragh
|first3 = Adam |last3 = Monnier
|first4 = Zachary |last4 = Pligge
|first5 = Kellen |last5 = Stolze
|first6 = Josh |last6 = West
|first7 = Arnold |last7 = Yim
|first8 = Richard |last8 = Ditteon
|date = October 2010
|title = Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..152A
|journal = The Minor Planet Bulletin
|volume = 37
|issue = 4
|pages = 152–158
|issn = 1052-8091
|bibcode = 2010MPBu...37..152A
|access-date= 29 December 2016}}
|first1 = Luca |last1 = Strabla
|first2 = Ulisse |last2 = Quadri
|first3 = Robert |last3 = Girelli
|date = April 2013
|title = Asteroid Observed from Bassano Bresciano Observatory 2012 August-September
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40...83S
|journal = The Minor Planet Bulletin
|volume = 40
|issue = 2
|pages = 83–84
|issn = 1052-8091
|bibcode = 2013MPBu...40...83S
|access-date= 29 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
|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= 29 December 2016}}
}}
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
- [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|1604}}
- {{JPL small body}}
{{Minor planets navigator |1603 Neva |number=1604 |1605 Milankovitch}}
{{Small Solar System bodies}}
{{Authority control}}
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