810 Atossa
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 810 Atossa
| background = #D6D6D6
| image = 000810-asteroid shape model (810) Atossa.png
| image_scale =
| caption = Shape model of Atossa from its lightcurve
| discoverer = M. F. Wolf
| discovery_site = Heidelberg Obs.
| discovered = 8 September 1915
| mpc_name = (810) Atossa
| alt_names = A915 RS{{·}}1931 PF
1934 NB{{·}}1947 PA
1915 XQ
| pronounced = {{IPAc-en|@|'|t|Q|s|@}}Noah Webster (1884) A Practical Dictionary of the English Language
| named_after = Atossa (550–475 BC)
{{small|(Persian queen)}}
| mp_category = {{plainlist|
- main-belt {{·}}{{small|(inner)}}
- {{nowrap|background {{·}}Flora }}
}}
| epoch = 31 May 2020 (JD 2459000.5)
| uncertainty = 0
| observation_arc = 104.41 yr (38,136 d)
| aphelion = 2.5717 AU
| perihelion = 1.7853 AU
| semimajor = 2.1785 AU
| eccentricity = 0.1805
| period = 3.22 yr (1,174 d)
| mean_anomaly = 198.29°
| mean_motion = {{Deg2DMS|0.3065|sup=ms}} / day
| inclination = 2.6122°
| asc_node = 152.69°
| arg_peri = 195.84°
| mean_diameter = {{val|8.104|0.119|ul=km}}
| rotation = {{val|4.3851|0.0004|ul=h}}
| pole_ecliptic_lat= {{plainlist|
}}
| albedo = {{val|0.224|0.046}}
| spectral_type = S {{small|(assumed)}}
| abs_magnitude = {{plainlist|
}}
810 Atossa (prov. designation: {{mp|A915 RS}} or {{mp|1915 XQ}}) is a bright and elongated background asteroid from the region of the Flora family, located in the inner portion of the asteroid belt. It was discovered on 8 September 1915, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southern Germany. The presumed S-type asteroid has a rotation period of 4.4 hours and measures approximately {{convert|8|km|mi|abbr=off|sigfig=1|sp=us}} in diameter. It was named after the ancient Persian queen Atossa (550–475 BC).
Orbit and classification
Atossa is a non-family asteroid of the main belt's background population when applying the synthetic hierarchical clustering method (HCM) by Nesvorný to its proper orbital elements. However, in an older HCM-analysis by Zappalà from 1995, this asteroid is considered a member of the Flora family ({{small|402}}), a giant asteroid family and the largest family of stony asteroids in the main-belt.{{rp|23}} In a third HCM-analysis by Milani and Knežević (AstDyS), it is also a background asteroid, as this analysis does not recognize the Flora asteroid clan as a proper family.
Atossa orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 3 months (1,174 days; semi-major axis of 2.18 AU). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic. The body's observation arc begins at Heidelberg Observatory with its official discovery observation on 8 September 1915.
Naming
This minor planet was named after Atossa (550–475 BC), an ancient Persian queen, daughter of Cyrus, wife of Darius. The {{MoMP|810|naming}} was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 80}}). The asteroids 7209 Cyrus and 7210 Darius were named after her father and husband, respectively.{{Citation needed|date=May 2024}}
Physical characteristics
Atossa is assumed to be a stony S-type asteroid, based on its high albedo (see below) and its proximity or potential membership to the stony Flora family.{{rp|23}}
File:810Atossa (Lightcurve Inversion).png-based 3D-model of Atossa]]
= Rotation period =
In August 2005, a rotational lightcurve of Atossa was obtained from photometric observations by French amateur astronomer Philippe Baudoin. Lightcurve analysis gave a well-defined rotation period of {{val|4.3851|0.0004}} hours with a high brightness variation of {{val|0.55|0.01}} magnitude, indicative of a non-spherical, elongated shape ({{small|U=3}}).
In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a sidereal period of {{val|4.38547|0.00005}} hours, as well as two spin axes at (12.0°, 67.0°) and (188.0°, 69.0°) in ecliptic coordinates (λ, β).
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Atossa measures {{val|8.104|0.119}} kilometers in diameter and its surface has an albedo of {{val|0.224|0.046}}. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a Florian asteroid of 0.24 and calculates a diameter of 8.58 kilometers based on an absolute magnitude of 12.5. Alternative mean diameter measurements published by the WISE team include ({{val|6.99|1.24|ul=km}}) and ({{val|8.356|0.053|u=km}}) with corresponding albedos of ({{val|0.35|0.17}}) and ({{val|0.2115|0.0097}}).
References
{{reflist|30em|refs=
|type = 2020-02-05 last obs.
|title = JPL Small-Body Database Browser: 810 Atossa (A915 RS)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000810
|archive-url = https://web.archive.org/web/20200319223405/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000810
|url-status = dead
|archive-date = 19 March 2020
|publisher = Jet Propulsion Laboratory
|access-date = 26 March 2020}}
|title = Dictionary of Minor Planet Names
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|chapter = (810) Atossa
|page = 75
|date = 2007
|doi = 10.1007/978-3-540-29925-7_811
|isbn = 978-3-540-00238-3}}
|title = 810 Atossa (A915 RS)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=810
|access-date = 26 March 2020}}
|title = Asteroids and comets rotation curves – (810) Atossa
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page3cou.html#000810
|access-date = 26 March 2020}}
|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}}
|title = LCDB Data for (810) Atossa
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=810
|access-date = 26 March 2020}}
|display-authors = 6
|first1 = A. K. |last1 = Mainzer
|first2 = J. M. |last2 = Bauer
|first3 = R. M. |last3 = Cutri
|first4 = T. |last4 = Grav
|first5 = E. A. |last5 = Kramer
|first6 = J. R. |last6 = Masiero
|first7 = C. R. |last7 = Nugent
|first8 = S. M. |last8 = Sonnett
|first9 = R. A. |last9 = Stevenson
|first10 = E. L. |last10 = Wright
|date = June 2016
|title = NEOWISE Diameters and Albedos V1.0
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab
|journal = NASA Planetary Data System
|bibcode = 2016PDSS..247.....M
|access-date= 26 March 2020}}
|display-authors = 6
|last1 = Hanuš |first1 = J.
|last2 = Ďurech |first2 = J.
|last3 = Brož |first3 = M.
|last4 = Warner |first4 = B. D.
|last5 = Pilcher |first5 = F.
|last6 = Stephens |first6 = R.
|last7 = Oey |first7 = J.
|last8 = Bernasconi |first8 = L.
|last9 = Casulli |first9 = S.
|last10 = Behrend |first10 = R.
|last11 = Polishook |first11 = D.
|last12 = Henych |first12 = T.
|last13 = Lehký |first13 = M.
|last14 = Yoshida |first14 = F.
|last15 = Ito |first15 = T.
|date = June 2011
|title = A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method
|journal = Astronomy and Astrophysics
|volume = 530
|page = A134
|bibcode = 2011A&A...530A.134H
|issn = 0004-6361
|doi = 10.1051/0004-6361/201116738
|arxiv = 1104.4114}}
|title = Asteroid 810 Atossa
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=810+Atossa
|access-date = 26 March 2020}}
|title = Asteroid 810 Atossa – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=810
|access-date= 26 March 2020}}
|last1 = Zappalà |first1 = V.
|last2 = Bendjoya |first2 = Ph.
|last3 = Cellino |first3 = A.
|last4 = Farinella |first4 = P.
|last5 = Froeschle |first5 = C.
|date = 1997
|title = Asteroid Dynamical Families
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_5_DDR_FAMILY_V4_1/data/family.tab
|journal = NASA Planetary Data System
|pages = EAR-A-5-DDR-FAMILY-V4.1
|access-date = 26 March 2020}}} ([https://sbn.psi.edu/pds/resource/family.html PDS main page])
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|title = Identification and Dynamical Properties of Asteroid Families
|journal = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628}}
}}
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
- [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|810}}
- {{JPL small body}}
{{Minor planets navigator |809 Lundia |number=810 |811 Nauheima}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Atossa}}