# 1145 Robelmonte

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> Markdown URL: https://mediated.wiki/source/1145_Robelmonte.md
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> Source revision: 1346046761
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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=July 2018}}
{{Infobox planet
 | minorplanet     = yes
 | name            = 1145 Robelmonte
 | background      = #D6D6D6
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="jpldata" />
 | discoverer      = [E. Delporte](/source/Eug%C3%A8ne_Delporte)
 | discovery_site  = [Uccle Obs.](/source/Royal_Observatory_of_Belgium)
 | discovered      = 3 February 1929
 | mpc_name        = (1145) Robelmonte
 | alt_names       = 1929 CC{{·}}A915 RN
 | pronounced      = 
 | named_after     = [Robelmont](/source/Robelmont)<ref name="springer" /><br />{{small|(birthplace of [Sylvain Arend](/source/Sylvain_Arend))}}
 | mp_category     = [main-belt](/source/main-belt){{·}}[Vestian](/source/Vesta_family)<ref name="lcdb" /><ref name="Ferret" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 4 September 2017 ([JD](/source/Julian_day) 2458000.5)
 | uncertainty     = 0
 | observation_arc = 86.87 yr (31,730 days)
 | aphelion        = 2.7112 [AU](/source/Astronomical_unit)
 | perihelion      = 2.1363 AU
 | semimajor       = 2.4238 AU
 | eccentricity    = 0.1186
 | period          = 3.77 [yr](/source/Julian_year_(astronomy)) (1,378 days)
 | mean_anomaly    = 68.012[°](/source/Degree_(angle))
 | mean_motion     = {{Deg2DMS|0.2612|sup=ms}} / day
 | inclination     = 6.2071°
 | asc_node        = 346.82°
 | arg_peri        = 267.51°
 | dimensions      = {{val|18.85|5.08}} km<ref name="Nugent-2015" /><br />{{val|19.13|5.00}} km<ref name="Nugent-2016" /><br />{{val|22.23|0.39}} km<ref name="Masiero-2012" /><br />23.16 km {{small|(derived)}}<ref name="lcdb" /><br />{{val|24.029|0.129}} km<ref name="Masiero-2012" /><br />{{val|24.07|0.37}} km<ref name="AKARI" /><br />{{val|24.757|0.541}} km<ref name="WISE" />
 | rotation        = {{val|7.582|0.0027}} h<ref name="Waszczak-2015" /><br />{{val|8.002|0.002}} h<ref name="Mansego-2016" /><br />{{val|9.01|0.01}} h<ref name="Gartrelle-2012" /><br />{{val|21|}} [h](/source/Hour)<ref name="geneva-obs" />
 | albedo          = 0.0994 {{small|(derived)}}<ref name="lcdb" /><br />{{val|0.1046|0.0175}}<ref name="WISE" /><br />{{val|0.108|0.020}}<ref name="Masiero-2012" /><br />{{val|0.113|0.004}}<ref name="AKARI" /><br />{{val|0.128|0.006}}<ref name="Masiero-2014" /><br />{{val|0.15|0.09}}<ref name="Nugent-2016" /><br />{{val|0.16|0.08}}<ref name="Nugent-2015" />
 | spectral_type   = [S](/source/S-type_asteroid)<ref name="lcdb" />
 | abs_magnitude   = 11.10<ref name="AKARI" /><ref name="WISE" />{{·}}{{val|11.157|0.001}} {{small|(R)}}<ref name="Waszczak-2015" />{{·}}11.30<ref name="lcdb" /><ref name="Nugent-2015" /><ref name="Masiero-2012" />{{·}}{{val|11.37|0.27}}<ref name="Veres-2015" />{{·}}11.4<ref name="jpldata" />{{·}}11.44<ref name="Nugent-2016" />
}}

'''1145 Robelmonte''', provisional designation {{mp|1929 CC}}, is a Vestian [asteroid](/source/asteroid) from the inner regions of the [asteroid belt](/source/asteroid_belt), approximately 23 kilometers in diameter.

It was discovered on 3 February 1929, by Belgian astronomer [Eugène Delporte](/source/Eug%C3%A8ne_Delporte) at the [Royal Observatory of Belgium](/source/Royal_Observatory_of_Belgium) in Uccle.<ref name="MPC-object" /> Through a glitch in the naming process, the asteroid received the name "Robelmonte" instead of "Mimi" as originally intended by the discoverer.<ref name="springer" />

== Orbit and classification ==

''Robelmonte'' is a member of the [Vesta family](/source/Vesta_family) ({{small|[401](/source/FIN_tbl)}}),<ref name="lcdb" /><ref name="Ferret" /> the main-belt's second-largest [asteroid family](/source/asteroid_family) by number of members.<ref name="Nesvorny-2014" />{{rp|23}} Vestian asteroids have a composition akin to the [HED meteorite](/source/HED_meteorite)s and are thought to have originated deep within [4&nbsp;Vesta](/source/4%26nbsp%3BVesta)'s crust, possibly from [Rheasilvia](/source/Rheasilvia), a large [impact crater](/source/impact_crater) on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision.<ref name="Kelley-2003" /> Vesta is the main belt's [second-largest](/source/List_of_exceptional_asteroids) and [second-most-massive](/source/List_of_exceptional_asteroids) body after [Ceres](/source/Ceres_(dwarf_planet)).

''Robelmonte''  orbits the Sun in the [inner](/source/Kirkwood_gap) main-belt at a distance of 2.1–2.7&nbsp;[AU](/source/Astronomical_unit) once every 3 years and 9 months (1,378 days). Its orbit has an [eccentricity](/source/orbital_eccentricity) of 0.12 and an [inclination](/source/orbital_inclination) of 6[°](/source/Degree_(angle)) with respect to the [ecliptic](/source/ecliptic).<ref name="jpldata" /> The asteroid was first identified as {{mp|A915 RN}} at [Simeiz Observatory](/source/Simeiz_Observatory) in September 1915. Its [observation arc](/source/observation_arc) begins at [Algiers Observatory](/source/Algiers_Observatory) in August 1930, more than a year after its official discovery observation at Uccle.<ref name="MPC-object" />

== Physical characteristics ==

''Robelmonte'' is an assumed stony [S-type asteroid](/source/S-type_asteroid),<ref name="lcdb" /> despite its relatively low albedo.

=== Rotation period ===

In March 2016, the best-rated rotational [lightcurve](/source/lightcurve) of ''Robelmonte'' was obtained from photometric observations by the  Spanish amateur astronomer group OBAS (Observadores de Asteroides – Asteroid Observers). Lightcurve analysis gave a [rotation period](/source/rotation_period) of 8.002 hours with a brightness variation of 0.13 [magnitude](/source/Magnitude_(astronomy)) ({{small|[U=3-](/source/LCDB_quality_code)}}).<ref name="Mansego-2016" /> Previous observations gave a divergent period of 7.582, 9.01 and 21 hours, respectively ({{small|[U=2/2/1](/source/LCDB_quality_code)}}).<ref name="Waszczak-2015" /><ref name="Gartrelle-2012" /><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), ''Robelmonte'' measures between 18.85 and 24.757 kilometers in diameter  and its surface has an [albedo](/source/astronomical_albedo) between 0.1046 and 0.16.<ref name="Nugent-2015" /><ref name="Nugent-2016" /><ref name="Masiero-2012" /><ref name="AKARI" /><ref name="WISE" /><ref name="Masiero-2014" />

The ''Collaborative Asteroid Lightcurve Link'' derives a low albedo of 0.0994 and a diameter of 23.16 kilometers based on an [absolute magnitude](/source/absolute_magnitude) of 11.3.<ref name="lcdb" />

== Naming ==

This [minor planet](/source/minor_planet) was named after [Robelmont](/source/Robelmont), the birthplace of Belgian astronomer [Sylvain Arend](/source/Sylvain_Arend) (Robelmonte is the feminine form). Through an error, the names intended for [1127&nbsp;Mimi](/source/1127%26nbsp%3BMimi) (wife of Delporte) and 1145&nbsp;Robelmonte (birthplace of Arend) had been switched, and each name had been proposed by the discoverer of the other asteroid. The official naming citation was mentioned in ''[The Names of the Minor Planets](/source/The_Names_of_the_Minor_Planets)'' by [Paul Herget](/source/Paul_Herget) in 1955 ({{small|[H 107](/source/Herget's_discovery_circumstances)}}).<ref name="springer" />

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

<ref name="jpldata">{{cite web
  |type       = 2017-07-05 last obs.
  |title      = JPL Small-Body Database Browser: 1145 Robelmonte (1929 CC)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001145
  |publisher  = [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory)
  |accessdate = 8 September 2017}}</ref>

<ref name="springer">{{cite book
  |last       = Schmadel | first = Lutz D.
  |title = Dictionary of Minor Planet Names |publisher  = [Springer Berlin Heidelberg](/source/Springer_Berlin_Heidelberg)
  |page       = 97
  |date       = 2007
  |isbn       = 978-3-540-00238-3
  |doi       = 10.1007/978-3-540-29925-7_1146 |chapter       = (1145) Robelmonte }}</ref>

<ref name="MPC-object">{{cite web
  |title      = 1145 Robelmonte (1929 CC)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=1145
  |accessdate = 8 September 2017}}</ref>

<ref name="geneva-obs">{{cite web
  |title      = Asteroids and comets rotation curves – (1145) Robelmonte
  |last       = Behrend |first = Raoul
  |publisher  = [Geneva Observatory](/source/Geneva_Observatory)
  |url        = http://obswww.unige.ch/~behrend/page3cou.html#001145
  |accessdate = 8 September 2017}}</ref>

<ref name="Masiero-2014">{{cite journal
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<ref name="lcdb">{{cite LCDB|number = 1145
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<ref name="Masiero-2012">{{cite journal
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<ref name="Nugent-2016">{{cite journal
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<ref name="AKARI">{{cite journal
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  |first1     = Fumihiko |last1 = Usui
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  |first8     = Hirokazu |last8 = Kataza
  |first9     = Satoshi |last9 = Takita
  |first10    = Shinki |last10 = Oyabu
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  |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
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  |bibcode    = 2011PASJ...63.1117U
  |doi        = 10.1093/pasj/63.5.1117
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  }} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1145 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>

<ref name="WISE">{{cite journal
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  |volume     = 741
  |issue      = 2
  |page       = 25
  |bibcode    = 2011ApJ...741...90M
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  |arxiv      = 1109.6407}}</ref>

<ref name="Gartrelle-2012">{{Cite journal
  |author     = Gartrelle, Gordon M.
  |date       = April 2012
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  |journal    = The Minor Planet Bulletin
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<ref name="Waszczak-2015">{{cite journal
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<ref name="Mansego-2016">{{Cite journal
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<ref name="Veres-2015">{{cite journal
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<ref name="Ferret">{{cite web
  |title      = Asteroid 1145 Robelmonte – Nesvorny HCM Asteroid Families V3.0
  |work       = Small Bodies Data Ferret
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<ref name="Nesvorny-2014">{{Cite book
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  |bibcode    = 2015aste.book..297N
  |doi        = 10.2458/azu_uapress_9780816532131-ch016
  |arxiv      = 1502.01628
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<ref name="Kelley-2003">{{cite journal
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  |bibcode    = 2003Icar..165..215K
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  |accessdate = 8 September 2017}}</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|1145}}
* {{JPL small body}}

{{Minor planets navigator |1144 Oda |number=1145 |1146 Biarmia}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:Robelmonte}}
001145
Category:Discoveries by Eugène Joseph Delporte
Category:Named minor planets
19290203

---
Adapted from the Wikipedia article [1145 Robelmonte](https://en.wikipedia.org/wiki/1145_Robelmonte) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/1145_Robelmonte?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.