| 词条 | 6070 Rheinland |
| 释义 |
| minorplanet = yes | name = 6070 Rheinland | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = [1] | discoverer = F. Börngen | discovery_site = {{nowrap|Karl Schwarzschild Obs.}} | discovered = 10 December 1991 | mpc_name = (6070) Rheinland | alt_names = {{mp|1991 XO|1}}{{·}}{{mp|1950 TW|1}} 1983 NW | pronounced = | named_after = Rhineland [1] {{small|(German region)}} | mp_category = main-belt [1]{{·}}{{small|(inner)}} Nysa [5] | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 67.36 yr (24,605 d) | aphelion = 2.8917 AU | perihelion = 1.8824 AU | semimajor = 2.3870 AU | eccentricity = 0.2114 | period = 3.69 yr (1,347 d) | mean_anomaly = 96.675° | mean_motion = {{Deg2DMS|0.2672|sup=ms}} / day | inclination = 3.1297° | asc_node = 83.948° | arg_peri = 292.67° | mean_diameter = {{val|4.36|ul=km}} {{small|(derived)}}[7] {{val|4.4|0.6|u=km}}[8] | rotation = {{val|4.27333|0.00005|ul=h}}[9] {{val|4.2735|0.0003|u=h}}{{efn|name=lcdb-Pravec-2011}} {{val|4.27371|0.00005|u=h}}[10] {{val|4.2737137|0.0000005|u=h}}[8] {{val|4.273715|0.000003|u=h}}[12] {{val|4.287|0.0015|u=h}}[13] {{val|4.482|0.001|u=h}}[14] | albedo = {{val|0.20|0.05}}[8] | spectral_type = S/Q [16]{{·}}S {{small|(SDSS-MFB)}}[7]{{efn|name=SDSS-MFB}} V–R {{=}} {{val|0.490|0.050}}[8] | abs_magnitude = {{val|13.67|0.02}} {{small|(R)}}[8] {{val|13.68|0.02}} {{small|(R)}}{{efn|name=lcdb-Pravec-2011}} 13.8 {{val|14.07|0.19}}[16] 14.17[7] {{val|14.17|0.054}}[23] {{val|14.17|0.07}}[10] {{val|14.342|0.006}} {{small|(S)}}[13] }}6070 Rheinland, provisional designation {{mp|1991 XO|1}}, is a paired Nysian asteroid from the inner regions of the asteroid belt, approximately {{convert|4.4|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 10 December 1991, by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany. The asteroid was named after the Rhineland, a region in western Germany.[1] The stony asteroid has a rotation period of 4.27 hours.[7] Orbit and classificationRheinland is a member of the Nysa family ({{small|405}}),[5] the largest asteroid family that can be divided further into subfamilies with different spectral properties.[29]{{rp|23}} It orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,347 days; semi-major axis of 2.39 AU). Its orbit has an eccentricity of 0.21 and an inclination of 3° with respect to the ecliptic. The asteroid was first observed as {{mp|1950 TW|1}} at Heidelberg Observatory in October 1950. The body's observation arc begins with a precovery taken at the Palomar Observatory in March 1956, more than 35 years prior to its official discovery observation at Tautenburg.[1] Physical characteristicsRheinland has been characterized as an S- and Q-type asteroid by Pan-STARRS{{'}} photometric survey.[16] It is also characterized as a stony S-type asteroid in the SDSS–MFB taxonomy (Masi Foglia Binzel).[7]{{efn|name=SDSS-MFB}} Rotation period and polesSeveral rotational lightcurves of Rheinland have been obtained from photometric observations since 2009.[9][13][14]{{efn|name=lcdb-Pravec-2011}} Analysis of the best-rated lightcurve gave a rotation period of 4.27333 hours with a consolidated brightness amplitude between 0.40 and 0.58 magnitude ({{small|U=3}}).[7] Published in 2014, a modeled lightcurve gave a period 4.273715 hours, as well as a two spin axes of (110.0°, −60.0°) and (290°, −60.0°) in ecliptic coordinates (λ, β).[12] In 2017, modelling gave a period of {{val|4.2737137|u=h}} and a single spin axis of (124°, −87.0°),[8] refining a previously published result of {{val|4.27371|u=h}} and (4°, −76.0°).[10] Diameter and albedoAccording to a detailed study published in 2017, Rheinland measures 4.4 kilometers in diameter and its surface has an albedo of 0.20,[8] while the Collaborative Asteroid Lightcurve Link also assumes an albedo of 0.20 and derives a similar diameter of 4.36 kilometers based on an absolute magnitude of 14.17.[7] Asteroid pairRheinland forms an asteroid pair with asteroid {{LoMP|54827|{{mp|(54827) 2001 NQ|8}}}}, a newly found class of two unbound bodies on nearly identical orbits around the Sun. Asteroid pairs have not been studied in detail yet. In the past, the members of a pair (or cluster if more than two members) had very small relative velocities and may have been a binary asteroid until they became gravitationally unbound and continued on separate orbits. Other asteroid pairs may have resulted from a collisional breakup of a parent body similar to the process that formed the asteroid families.[43]It is thought that this pair was created due to rotational fission (YORP effect) some {{val|16340|40}} years ago.[8] The other body of this pair, {{mp|2001 NQ|8}}, has a diameter of approximately 2.09 kilometers, an albedo of 0.213, and is an assumed Q-type asteroid.[45][43] NamingThis minor planet was named after the Rhineland, a region in western Germany.[1] The official naming citation was published by the Minor Planet Center on 17 March 1995 ({{small|M.P.C. 24919}}).[48] Notes{{notelist|refs={{efn|name=lcdb-Pravec-2011|1=Pravec (2011) web: lightcurve plot (6070) Rheinland with a rotation period {{val|4.2735|0.0003|u=h}} hours and a brightness amplitude of {{val|0.40|0.02}} mag. Quality Code is 3. Summary figures at LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2011).}}{{efn|name=SDSS-MFB|1=Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog (publication). SDSS-MFB (Masi Foglia Binzel) taxonomy (catalog).}}}} References1. ^1 2 3 4 5 6 {{cite web |title = 6070 Rheinland (1991 XO1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=6070 |accessdate = 13 April 2018}} [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]2. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 13 April 2018}} 3. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (6070) Rheinland |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page5cou.html#006070 |accessdate = 13 April 2018}} 4. ^1 2 {{cite web |title = Small Bodies Data Ferret |work = Nesvorny HCM Asteroid Families V3.0 |url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |accessdate = 13 April 2018}} 5. ^1 {{Cite journal |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |url = https://arxiv.org/pdf/1502.01628.pdf |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |access-date= 13 April 2018}} 6. ^1 2 {{cite web |title = Asteroid pairs and clusters |work = Johnston's Archive |date = 14 October 2017 |author = Johnston, Wm. Robert |url = http://www.johnstonsarchive.net/astro/asteroidpairs.html |accessdate = 9 December 2017}} 7. ^1 {{Cite journal |first1 = David |last1 = Vokrouhlický |first2 = David |last2 = Nesvorný |date = January 2009 |title = The Common Roots of Asteroids (6070) Rheinland and (54827) 2001 NQ8 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009AJ....137..111V |journal = The Astronomical Journal |volume = 137 |issue = 1 |pages = 111–117 |bibcode = 2009AJ....137..111V |doi = 10.1088/0004-6256/137/1/111 |access-date= 13 April 2018}} 8. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (6070) Rheinland |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=6070%7CRheinland |accessdate = 13 April 2018}} 9. ^1 2 3 4 5 6 7 8 {{Cite journal |display-authors = 6 |first1 = David |last1 = Vokrouhlický |first2 = Petr |last2 = Pravec |first3 = Josef |last3 = Durech |first4 = Kamil |last4 = Hornoch |first5 = Peter |last5 = Kusnirák |first6 = Adrián |last6 = Galád |first7 = Jan |last7 = Vrastil |first8 = Hana |last8 = Kucáková |first9 = Joseph T. |last9 = Pollock |first10 = Jose Luis |last10 = Ortiz |first11 = Nicolas |last11 = Morales |first12 = Ninel M. |last12 = Gaftonyuk |first13 = Donald P. |last13 = Pray |first14 = Yurij N. |last14 = Krugly |first15 = Raguli Ya. |last15 = Inasaridze |first16 = Vova R. |last16 = Ayvazian |first17 = Igor E. |last17 = Molotov |first18 = Carlos A. |last18 = Colazo |date = June 2017 |title = Detailed Analysis of the Asteroid Pair (6070) Rheinland and (54827) 2001 NQ8 |url = http://astro.mff.cuni.cz/davok/papers/rheinland_AJ2017.pdf |journal = The Astronomical Journal |volume = 153 |issue = 6 |page = 17 |bibcode = 2017AJ....153..270V |doi = 10.3847/1538-3881/aa72ea |access-date= 13 April 2018}} 10. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = https://arxiv.org/pdf/1504.04041.pdf |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 13 April 2018}} 11. ^1 2 {{cite journal |display-authors = 6 |first1 = P. |last1 = Pravec |first2 = D. |last2 = Vokrouhlický |first3 = D. |last3 = Polishook |first4 = D. 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5 : Nysa asteroids|Discoveries by Freimut Börngen|Minor planets named for places|Named minor planets|Astronomical objects discovered in 1991 |
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