1119 Euboea
{{Short description|Background asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1119 Euboea
| background = #D6D6D6
| image = 001119-asteroid shape model (1119) Euboea.png
| image_scale =
| caption = Shape model of Euboea from its lightcurve
| discoverer = K. Reinmuth
| discovery_site = Heidelberg Obs.
| discovered = 27 October 1927
| mpc_name = (1119) Euboea
| alt_names = 1927 UB
| pronounced = {{IPAc-en|j|uː|ˈ|b|iː|ə}}
| named_after = Euboea {{small|(Greek island)}}
| mp_category = {{plainlist|
- main-belt{{·}}{{small|(middle)}}
- background}}
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 90.10 yr (32,908 days)
| aphelion = 3.0172 AU
| perihelion = 2.2036 AU
| semimajor = 2.6104 AU
| eccentricity = 0.1558
| period = 4.22 yr (1,540 days)
| mean_anomaly = 190.40°
| mean_motion = {{Deg2DMS|0.2337|sup=ms}} / day
| inclination = 7.8583°
| asc_node = 57.381°
| arg_peri = 230.16°
| dimensions = {{val|18.37|4.84}} km
{{val|25.10|8.95}} km
{{val|29.443|0.279}} km
31.46 km {{small|(derived)}}
{{val|31.881|0.199}} km
{{val|31.90|0.38}} km
| rotation = {{val|11.396|0.001}} h
{{val|11.3981|0.0005}} h
{{val|11.39823|0.00001}} h
{{val|11.41|0.01}} h
| albedo = 0.0539 {{small|(derived)}}
{{val|0.0576|0.0081}}
{{val|0.058|0.002}}
{{val|0.09|0.06}}
{{val|0.15|0.07}}
{{val|0.213|0.044}}
| spectral_type = S {{small|(assumed)}}
| abs_magnitude = 11.20{{·}}11.30{{·}}11.32
}}
1119 Euboea ({{IPAc-en|j|uː|ˈ|b|iː|ə}}; prov. designation: {{mp|1927 UB}}) is a background asteroid from the central region of the asteroid belt. It was discovered on 27 October 1927, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid has a rotation period of 11.4 hours and measures approximately {{convert|30|km|mi|abbr=off|sp=us}} in diameter. It was named for the Greek island of Euboea.
Orbit and classification
Euboea is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the central asteroid belt at a distance of 2.2–3.0 AU once every 4 years and 3 months (1,540 days; semi-major axis of 2.61 AU). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic. The body's observation arc begins with a recovered observation from the Lowell Observatory in April 1930, more than 2 years after to its official discovery observation.
Naming
This minor planet was named after Euboea, also known as "Negropont", the largest island of Greece in the Aegean Sea. The {{MoMP|1119|naming}} was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 105}}).
Physical characteristics
Euboea is an assumed stony S-type asteroid.
= Rotation period and poles =
In October 2007, a first rotational lightcurve of Euboea was obtained from photometric observations by astronomers at the Oakley Southern Sky Observatory in Australia. Lightcurve analysis gave a rotation period of 11.41 hours with a brightness variation of 0.50 magnitude ({{small|U=3}}). In April 2010, a similar period of 11.396 hours and an amplitude of 0.46 magnitude was measured by French amateur astronomer Pierre Antonini ({{small|U=3}}).
In 2016, two modeled lightcurves were published using photometric data from the Lowell Photometric Database and other sources. They gave a concurring sidereal period of 11.3981 and 11.39823 hours, respectively. Each study also determined two respective spin axes of (79.0°, 75.0°) and (282.0°, 55.0°), and (71.0°, 61.0°) and (280.0°, 54.0°) in ecliptic coordinates (λ, β).
= 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, Euboea measures between 18.37 and 31.90 kilometers in diameter and its surface has an albedo between 0.0576 and 0.213. The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0539 – typical for carbonaceous C-type asteroids – and a diameter of 31.46 kilometers based on an absolute magnitude of 11.3.
References
{{reflist|30em|refs=
|type = 2017-12-01 last obs.
|title = JPL Small-Body Database Browser: 1119 Euboea (1927 UB)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001119
|publisher = Jet Propulsion Laboratory
|accessdate = 25 January 2018}}
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|title = 1119 Euboea (1927 UB)
|work = Minor Planet Center
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|title = Asteroid 1119 Euboea
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1119+Euboea
|accessdate = 13 March 2020}}
|title = Asteroid 1119 Euboea – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1119
|access-date= 28 October 2019}}
}}
External links
- [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at www.minorplanet.info
- [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] – Geneva Observatory, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|1119}}
- {{JPL small body}}
{{Minor planets navigator |1118 Hanskya |number=1119 |1120 Cannonia}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Euboea}}