| 词条 | 1161 Thessalia |
| 释义 |
| minorplanet = yes | name = 1161 Thessalia | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discoverer = K. Reinmuth | discovery_site = Heidelberg Obs. | discovered = 29 September 1929 | mpc_name = (1161) Thessalia | alt_names = 1929 SF{{·}}1931 BB | pronounced = | named_after = {{nowrap|Thessaly {{small|(Greek region)}}[2]}} | mp_category = main-belt{{·}}{{small|(outer)}} | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 87.76 yr (32,056 days) | aphelion = 3.4488 AU | perihelion = 2.8975 AU | semimajor = 3.1732 AU | eccentricity = 0.0869 | period = 5.65 yr (2,065 days) | mean_anomaly = 213.02° | mean_motion = {{Deg2DMS|0.1744|sup=ms}} / day | inclination = 9.3913° | asc_node = 72.567° | arg_peri = 309.20° | dimensions = {{val|21.498|0.184}} km[4] | rotation = | albedo = {{val|0.065|0.010}}[5] | spectral_type = | abs_magnitude = 11.2 }}1161 Thessalia, provisional designation {{mp|1929 SF}}, is a dark background asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 29 September 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory.[7] It was named for the Greek region Thessaly.[2] Orbit and classificationThessalia is not a member of any known asteroid family.[9] It orbits the Sun in the outer main-belt at a distance of 2.9–3.4 AU once every 5 years and 8 months (2,065 days). Its orbit has an eccentricity of 0.09 and an inclination of 9° with respect to the ecliptic. The body's observation arc begins at Heidelberg, five weeks after its official discovery observation.[7]Physical characteristicsDiameter and albedoAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thessalia measures 21.498 kilometers in diameter and its surface has an albedo of 0.065.[4][5] LightcurvesAs of 2017, no rotational lightcurve of Thessalia has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.[14] NamingThis minor planet was named for the Thessaly region in eastern Greece. The subsequently numbered minor planet 1162 Larissa was named after the region's capital. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 108}}).[2] References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1161) Thessalia |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 98 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1162 |chapter = (1161) Thessalia }} [1][2][3][4][5][6]2. ^1 2 {{cite web |title = 1161 Thessalia (1929 SF) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1161 |accessdate = 7 September 2017}} 3. ^1 2 {{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 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M |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 |access-date= 7 September 2017}} 4. ^1 2 {{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 |access-date= 7 September 2017}} 5. ^1 {{cite web |title = Small Bodies Data Ferret |work = Nesvorny HCM Asteroid Families V3.0 |url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |accessdate = 7 September 2017}} 6. ^1 {{cite web |title = LCDB Data for (1161) Thessalia |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1161%7CThessalia |accessdate = 7 September 2017}} }} External links
5 : Background asteroids|Discoveries by Karl Wilhelm Reinmuth|Minor planets named for places|Named minor planets|Astronomical objects discovered in 1929 |
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