# 1041 Asta

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{{Short description|Carbonaceous background asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
 | minorplanet     = yes
 | name            = 1041 Asta
 | background      = #D6D6D6
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="jpldata" />
 | discoverer      = [K. Reinmuth](/source/Karl_Reinmuth)
 | discovery_site  = [Heidelberg Obs.](/source/Heidelberg-K%C3%B6nigstuhl_State_Observatory)
 | discovered      = 22 March 1925
 | mpc_name        = (1041) Asta
 | alt_names       = 1925 FA{{·}}{{mp|1938 SJ|1}}<br />1949 UQ{{·}}1949 UX<br />{{mp|1951 CQ|1}}{{·}}1956 AT<br />A906 VA{{·}}A917 YB
 | pronounced      = 
 | named_after     = [Asta Nielsen](/source/Asta_Nielsen)<ref name="springer" /><br />{{small|(Danish actress)}}
 | mp_category     = [main-belt](/source/main-belt){{·}}{{small|([outer](/source/Kirkwood_gap))}}<ref name="lcdb" /><br />[background](/source/Background_asteroid)<ref name="Ferret" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 4 September 2017 ([JD](/source/Julian_day) 2458000.5)
 | uncertainty     = 0
 | observation_arc = 110.65 yr (40,416 days)
 | aphelion        = 3.5142 [AU](/source/Astronomical_unit)
 | perihelion      = 2.6335 AU
 | semimajor       = 3.0738 AU
 | eccentricity    = 0.1433
 | period          = 5.39 [yr](/source/Julian_year_(astronomy)) (1,968 days)
 | mean_anomaly    = 203.59[°](/source/Degree_(angle))
 | mean_motion     = {{Deg2DMS|0.1829|sup=ms}} / day
 | inclination     = 13.934°
 | asc_node        = 60.001°
 | arg_peri        = 343.95°
 | dimensions      = {{val|43.46|10.89}} km<ref name="Nugent-2015" /><br />{{val|44.05|11.20}} km<ref name="Nugent-2016" /><br />{{val|49.43|0.78}} km<ref name="Masiero-2012" /><br />57.16 km {{small|(derived)}}<ref name="lcdb" /><br />{{val|58.88|0.87}} km<ref name="AKARI" /><br />{{val|60.571|0.199}} km<ref name="Masiero-2014" /><br />{{val|61.852|1.162}} km<ref name="WISE" />
 | rotation        = {{val|7.554|0.001}} h<ref name="geneva-obs" /><br />{{val|7.99|0.02}} [h](/source/Hour)<ref name="Carbo-2009a" />
 | albedo          = {{val|0.0421|0.0028}}<ref name="WISE" /><br />{{val|0.047|0.002}}<ref name="AKARI" /><br />{{val|0.047|0.006}}<ref name="Masiero-2014" /><br />0.0493 {{small|(derived)}}<ref name="lcdb" /><br />{{val|0.066|0.010}}<ref name="Masiero-2012" /><br />{{val|0.07|0.04}}<ref name="Nugent-2015" /><br />{{val|0.08|0.06}}<ref name="Nugent-2016" />
 | spectral_type   = [SMASS](/source/SMASS_classification) {{=}} [C](/source/C-type_asteroid)<ref name="jpldata" /><ref name="lcdb" />{{·}}[C](/source/C-type_asteroid)<ref name="Veres-2015" />
 | abs_magnitude   = {{val|10.08|0.31}}<ref name="Veres-2015" />{{·}}10.10<ref name="jpldata" /><ref name="lcdb" /><ref name="Nugent-2015" /><ref name="AKARI" /><ref name="Masiero-2012" /><ref name="WISE" />{{·}}10.17<ref name="Nugent-2016" />
}}

'''1041 Asta''', provisional designation {{mp|1925 FA}}, is a carbonaceous background [asteroid](/source/asteroid) from the outer regions of the [asteroid belt](/source/asteroid_belt), approximately 57 kilometers in diameter. It was discovered on 22 March 1925, by German astronomer [Karl Reinmuth](/source/Karl_Reinmuth) at the [Heidelberg Observatory](/source/Heidelberg_Observatory) in southwest Germany.<ref name="MPC-object" /> The asteroid was likely named after Danish actress [Asta Nielsen](/source/Asta_Nielsen).

== Orbit and classification ==

''Asta'' is a non-[family](/source/Asteroid_family) asteroid from the main belt's [background population](/source/Background_asteroid).<ref name="Ferret" /> It orbits the Sun in the [outer](/source/Kirkwood_gap) main-belt at a distance of 2.6–3.5&nbsp;[AU](/source/Astronomical_unit) once every 5 years and 5 months (1,968 days; [semi-major axis](/source/semi-major_axis) of 3.07&nbsp;AU). Its orbit has an [eccentricity](/source/orbital_eccentricity) of 0.14 and an [inclination](/source/orbital_inclination) of 14[°](/source/Degree_(angle)) with respect to the [ecliptic](/source/ecliptic).<ref name="jpldata" /> The asteroid was first observed as {{mp|A906 VA}} at Heidelberg in November 1906, where the body's [observation arc](/source/observation_arc) begins one month later in December 1906.<ref name="MPC-object" />

== Physical characteristics ==

In the [SMASS classification](/source/SMASS_classification), ''Asta'' is a carbonaceous [C-type asteroid](/source/C-type_asteroid).<ref name="jpldata" /> [Pan-STARRS](/source/Pan-STARRS) photometric survey also characterizes the asteroid as a C-type.<ref name="Veres-2015" />

=== Rotation period ===

[Photometric](/source/Photometry_(astronomy)) observations of ''Asta'' collected at the Australian [Oakley Southern Sky Observatory](/source/Oakley_Southern_Sky_Observatory) and the U.S. [Oakley Observatory](/source/Oakley_Observatory) in October 2008 show a [rotation period](/source/rotation_period) of 7.99 hours with a brightness variation of 0.22 [magnitude](/source/Magnitude_(astronomy)) ({{small|[U=2+](/source/LCDB_quality_code)}}).<ref name="Carbo-2009a" /> In February 2010, a refined [lightcurve](/source/lightcurve) with a period of 7.554 hours and an amplitude of 0.14 magnitude was obtained by French amateur astronomer [Pierre Antonini](/source/Pierre_Antonini), who also mentioned the possibility of an alternative period solution ({{small|[U=3-](/source/LCDB_quality_code)}}).<ref name="geneva-obs" />

=== Diameter and albedo ===

According to the surveys carried out by the Japanese [Akari satellite](/source/Akari_(satellite)) and the [NEOWISE](/source/NEOWISE) mission of NASA's [Wide-field Infrared Survey Explorer](/source/Wide-field_Infrared_Survey_Explorer), ''Asta'' measures between 43.46 and 61.852 kilometers in diameter and its surface has an [albedo](/source/astronomical_albedo) between 0.0421 and 0.08.<ref name="Nugent-2015" /><ref name="Nugent-2016" /><ref name="Masiero-2012" /><ref name="AKARI" /><ref name="Masiero-2014" /><ref name="WISE" />

The ''Collaborative Asteroid Lightcurve Link'' derives an albedo of 0.0493 and a diameter of 57.16 kilometers based on an [absolute magnitude](/source/absolute_magnitude) of 10.1.<ref name="lcdb" />

== Naming ==

This [minor planet](/source/minor_planet) was likely named after Danish actress [Asta Nielsen](/source/Asta_Nielsen) (1881–1972), according to research by the author of the ''Dictionary of Minor Planet Names'', [Lutz Schmadel](/source/Lutz_Schmadel) (LDS). The naming was proposed by [ARI-](/source/Astronomical_Calculation_Institute_(Heidelberg_University))astronomer [Gustav Stracke](/source/Gustav_Stracke).<ref name="springer" />

== References ==
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
  |type       = 2017-07-05 last obs.
  |title      = JPL Small-Body Database Browser: 1041 Asta (1925 FA)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001041
  |publisher  = [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory)
  |accessdate = 10 January 2018}}</ref>

<ref name="springer">{{cite book
  |title      = Dictionary of Minor Planet Names – (1041) Asta
  |last       = Schmadel | first = Lutz D.
  |publisher  = [Springer Berlin Heidelberg](/source/Springer_Berlin_Heidelberg)
  |page       = 89
  |date       = 2007
  |isbn       = 978-3-540-00238-3
  |doi       = 10.1007/978-3-540-29925-7_1042 |chapter       = (1041) Asta }}</ref>

<ref name="MPC-object">{{cite web
  |title      = 1041 Asta (1925 FA)
  |work       = [Minor Planet Center](/source/Minor_Planet_Center)
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=1041
  |accessdate = 10 January 2018}}</ref>

<ref name="geneva-obs">{{cite web
  |title      = Asteroids and comets rotation curves – (1041) Asta
  |last       = Behrend |first = Raoul
  |publisher  = Geneva Observatory
  |url        = http://obswww.unige.ch/~behrend/page3cou.html#001041
  |accessdate = 10 January 2018}}</ref>

<ref name="Masiero-2014">{{cite journal
  |display-authors = 6
  |first1     = Joseph R. |last1 = Masiero
  |first2     = T. |last2 = Grav
  |first3     = A. K. |last3 = Mainzer
  |first4     = C. R. |last4 = Nugent
  |first5     = J. M. |last5 = Bauer
  |first6     = R. |last6 = Stevenson
  |first7     = S. |last7 = Sonnett
  |date       = August 2014
  |title      = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos
  |journal    = The Astrophysical Journal
  |volume     = 791
  |issue      = 2
  |page       = 11
  |bibcode    = 2014ApJ...791..121M
  |doi        = 10.1088/0004-637X/791/2/121
  |arxiv      = 1406.6645|s2cid = 119293330 }}</ref>

<ref name="Ferret">{{cite web
  |title      = Asteroid 1041 Asta – Nesvorny HCM Asteroid Families V3.0
  |work       = Small Bodies Data Ferret
  |url        = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1041+Asta
  |accessdate = 24 October 2019}}</ref>

<ref name="lcdb">{{cite LCDB|number = 1041
  |accessdate = 10 January 2018}}</ref>

<ref name="AKARI">{{cite journal
  |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=1041 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>

<ref name="WISE">{{cite journal
  |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 }}</ref>

<ref name="Masiero-2012">{{cite journal
  |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= 10 January 2018}}</ref>

<ref name="Nugent-2015">{{cite journal
  |display-authors = 6
  |first1     = C. R. |last1 = Nugent
  |first2     = A. |last2 = Mainzer
  |first3     = J. |last3 = Masiero
  |first4     = J. |last4 = Bauer
  |first5     = R. M. |last5 = Cutri
  |first6     = T. |last6 = Grav
  |first7     = E. |last7 = Kramer
  |first8     = S. |last8 = Sonnett
  |first9     = R. |last9 = Stevenson
  |first10    = E. L. |last10 = Wright
  |date       = December 2015
  |title      = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N
  |journal    = The Astrophysical Journal
  |volume     = 814
  |issue      = 2
  |page       = 13
  |bibcode    = 2015ApJ...814..117N
  |doi        = 10.1088/0004-637X/814/2/117
  |arxiv      = 1509.02522
  |s2cid = 9341381 |access-date= 10 January 2018}}</ref>

<ref name="Nugent-2016">{{cite journal
  |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 }}</ref>

<ref name="Carbo-2009a">{{Cite journal
  |display-authors = 6
  |first1     = Landy |last1 = Carbo
  |first2     = Katherine |last2 = Kragh
  |first3     = Jonathan |last3 = Krotz
  |first4     = Andrew |last4 = Meiers
  |first5     = Nelson |last5 = Shaffer
  |first6     = Steven |last6 = Torno
  |first7     = Jason |last7 = Sauppe
  |first8     = Richard |last8 = Ditteon
  |date       = July 2009
  |title      = Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36...91C
  |journal    = The Minor Planet Bulletin
  |volume     = 36
  |issue      = 3
  |pages      = 91–94
  |issn       = 1052-8091
  |bibcode    = 2009MPBu...36...91C
  |access-date= 10 January 2018}}</ref>

<ref name="Veres-2015">{{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= 10 January 2018}}</ref>

}} <!-- end of reflist -->

== 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|1041}}
* {{JPL small body}}

{{Minor planets navigator |1040 Klumpkea |number=1041 |1042 Amazone}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:Asta}}
001041
Category:Discoveries by Karl Wilhelm Reinmuth
Category:Named minor planets
001041
19250322

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Adapted from the Wikipedia article [1041 Asta](https://en.wikipedia.org/wiki/1041_Asta) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/1041_Asta?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.