Астрономія 49/2012 Засновано 1958 Року
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Modelling and Scaling Neglected Asteroids
Asteroid studies via lightcurves Selection effects TPM Shape models vs. occultations Summary Modelling and scaling neglected asteroids A. Marciniak1 with V. Alí-Lagoa, T. Müller, P. Bartczak, R. Behrend, M. Butkiewicz-B ˛ak, G. Dudzinski,´ R. Duffard, K. Dziadura, S. Fauvaud, M. Ferrais, S. Geier, J. Grice, R. Hirsch, J. Horbowicz, K. Kaminski,´ P. Kankiewicz, D.-H. Kim, M.-J. Kim, I. Konstanciak, V. Kudak, L. Molnár, F. Monteiro, W. Ogłoza, D. Oszkiewicz, A. Pál, N. Parley, F. Pilcher, E. Podlewska - Gaca, T. Polakis, J. J. Sanabria, T. Santana-Ros, B. Skiff, K. Sobkowiak, R. Szakáts, S. Urakawa, M. Zejmo,˙ K. Zukowski˙ 1. Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Poznan,´ Poland ESOP XXXIX, 29 August 2020 Asteroid studies via lightcurves Selection effects TPM Shape models vs. occultations Summary Asteroid lightcurves (219) Thusnelda P = 59.74 h 487 Venetia P = 13.355h 2014 -2,1 Oct 11.1 Suhora 2012/2013 -2,2 Oct 12.1 Suhora Oct 29.0 Bor Oct 24.1 Bor. -2,05 Nov 10.2 Suh Oct 28.1 Bor. Nov 11.1 Suh CCCCCC Nov 4.0 Bor. CCCCCCCCC CC C C Nov 7.4 Organ M. Dec 28.8 Bor C Mar 2.8 Bor C Nov 8.4 Organ M. AAAA -2 Mar 3.8 Bor AAAAAA C Nov 13.4 Organ M. AAAA C CCC Nov 14.4 Organ M. A -2,1 AAA CCC A Nov 15.4 Organ M. A AA Nov 21.4 Winer -1,95 Dec 2.1 OAdM Dec 3.0 OAdM Dec 5.0 Bor. -
Aqueous Alteration on Main Belt Primitive Asteroids: Results from Visible Spectroscopy1
Aqueous alteration on main belt primitive asteroids: results from visible spectroscopy1 S. Fornasier1,2, C. Lantz1,2, M.A. Barucci1, M. Lazzarin3 1 LESIA, Observatoire de Paris, CNRS, UPMC Univ Paris 06, Univ. Paris Diderot, 5 Place J. Janssen, 92195 Meudon Pricipal Cedex, France 2 Univ. Paris Diderot, Sorbonne Paris Cit´e, 4 rue Elsa Morante, 75205 Paris Cedex 13 3 Department of Physics and Astronomy of the University of Padova, Via Marzolo 8 35131 Padova, Italy Submitted to Icarus: November 2013, accepted on 28 January 2014 e-mail: [email protected]; fax: +33145077144; phone: +33145077746 Manuscript pages: 38; Figures: 13 ; Tables: 5 Running head: Aqueous alteration on primitive asteroids Send correspondence to: Sonia Fornasier LESIA-Observatoire de Paris arXiv:1402.0175v1 [astro-ph.EP] 2 Feb 2014 Batiment 17 5, Place Jules Janssen 92195 Meudon Cedex France e-mail: [email protected] 1Based on observations carried out at the European Southern Observatory (ESO), La Silla, Chile, ESO proposals 062.S-0173 and 064.S-0205 (PI M. Lazzarin) Preprint submitted to Elsevier September 27, 2018 fax: +33145077144 phone: +33145077746 2 Aqueous alteration on main belt primitive asteroids: results from visible spectroscopy1 S. Fornasier1,2, C. Lantz1,2, M.A. Barucci1, M. Lazzarin3 Abstract This work focuses on the study of the aqueous alteration process which acted in the main belt and produced hydrated minerals on the altered asteroids. Hydrated minerals have been found mainly on Mars surface, on main belt primitive asteroids and possibly also on few TNOs. These materials have been produced by hydration of pristine anhydrous silicates during the aqueous alteration process, that, to be active, needed the presence of liquid water under low temperature conditions (below 320 K) to chemically alter the minerals. -
RASNZ Occultation Section Circular CN2009/1 April 2013 NOTICES
ISSN 11765038 (Print) RASNZ ISSN 23241853 (Online) OCCULTATION CIRCULAR CN2009/1 April 2013 SECTION Lunar limb Profile produced by Dave Herald's Occult program showing 63 events for the lunar graze of a bright, multiple star ZC2349 (aka Al Niyat, sigma Scorpi) on 31 July 2009 by two teams of observers from Wellington and Christchurch. The lunar profile is drawn using data from the Kaguya lunar surveyor, which became available after this event. The path the star followed across the lunar landscape is shown for one set of observers (Murray Forbes and Frank Andrews) by the trail of white circles. There are several instances where a stepped event was seen, due to the two brightest components disappearing or reappearing. See page 61 for more details. Visit the Occultation Section website at http://www.occultations.org.nz/ Newsletter of the Occultation Section of the Royal Astronomical Society of New Zealand Table of Contents From the Director.............................................................................................................................. 2 Notices................................................................................................................................................. 3 Seventh TransTasman Symposium on Occultations............................................................3 Important Notice re Report File Naming...............................................................................4 Observing Occultations using Video: A Beginner's Guide.................................................. -
The Minor Planet Bulletin, It Is a Pleasure to Announce the Appointment of Brian D
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 33, NUMBER 1, A.D. 2006 JANUARY-MARCH 1. LIGHTCURVE AND ROTATION PERIOD Observatory (Observatory code 926) near Nogales, Arizona. The DETERMINATION FOR MINOR PLANET 4006 SANDLER observatory is located at an altitude of 1312 meters and features a 0.81 m F7 Ritchey-Chrétien telescope and a SITe 1024 x 1024 x Matthew T. Vonk 24 micron CCD. Observations were conducted on (UT dates) Daniel J. Kopchinski January 29, February 7, 8, 2005. A total of 37 unfiltered images Amanda R. Pittman with exposure times of 120 seconds were analyzed using Canopus. Stephen Taubel The lightcurve, shown in the figure below, indicates a period of Department of Physics 3.40 ± 0.01 hours and an amplitude of 0.16 magnitude. University of Wisconsin – River Falls 410 South Third Street Acknowledgements River Falls, WI 54022 [email protected] Thanks to Michael Schwartz and Paulo Halvorcem for their great work at Tenagra Observatory. (Received: 25 July) References Minor planet 4006 Sandler was observed during January Schmadel, L. D. (1999). Dictionary of Minor Planet Names. and February of 2005. The synodic period was Springer: Berlin, Germany. 4th Edition. measured and determined to be 3.40 ± 0.01 hours with an amplitude of 0.16 magnitude. Warner, B. D. and Alan Harris, A. (2004) “Potential Lightcurve Targets 2005 January – March”, www.minorplanetobserver.com/ astlc/targets_1q_2005.htm Minor planet 4006 Sandler was discovered by the Russian astronomer Tamara Mikhailovna Smirnova in 1972. (Schmadel, 1999) It orbits the sun with an orbit that varies between 2.058 AU and 2.975 AU which locates it in the heart of the main asteroid belt. -
Asteroids' Physical Models from Combined Dense and Sparse
Astronomy & Astrophysics manuscript no. hanus_2013_AA c ESO 2013 January 30, 2013 Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution 1 1 1 2 3 4 5 6 7 J. Hanuš ∗, J. Durechˇ , M. Brož , A. Marciniak , B. D. Warner , F. Pilcher , R. Stephens , R. Behrend , B. Carry , D. Capekˇ 8, P. Antonini9, M. Audejean10, K. Augustesen11, E. Barbotin12, P. Baudouin13, A. Bayol11, L. Bernasconi14, W. Borczyk2, J.-G. Bosch15, E. Brochard16, L. Brunetto17, S. Casulli18, A. Cazenave12, S. Charbonnel12, B. Christophe19, F. Colas20, J. Coloma21, M. Conjat22, W. Cooney23, H. Correira24, V. Cotrez25, A. Coupier11, R. Crippa26, M. Cristofanelli17, Ch. Dalmas11, C. Danavaro11, C. Demeautis27, T. Droege28, R. Durkee29, N. Esseiva30, M. Esteban11, M. Fagas2, G. Farroni31, M. Fauvaud12,32, S. Fauvaud12,32, F. Del Freo11, L. Garcia11, S. Geier33,34, C. Godon11, K. Grangeon11, H. Hamanowa35, H. Hamanowa35, N. Heck20, S. Hellmich36, D. Higgins37, R. Hirsch2, M. Husarik38, T. Itkonen39, O. Jade11, K. Kaminski´ 2, P. Kankiewicz40, A. Klotz41,42,R. A.Koff43, A. Kryszczynska´ 2, T. Kwiatkowski2, A. Laffont11, A. Leroy12, J. Lecacheux44, Y. Leonie11, C. Leyrat44, F. Manzini45, A. Martin11, G. Masi11, D. Matter11, J. Michałowski46, M. J. Michałowski47, T. Michałowski2, J. Michelet48, R. Michelsen11, E. Morelle49, S. Mottola36, R. Naves50, J. Nomen51, J. Oey52, W. Ogłoza53, A. Oksanen49, D. Oszkiewicz34,54, P. Pääkkönen39, M. Paiella11, H. Pallares11, J. Paulo11, M. Pavic11, B. Payet11, M. Polinska´ 2, D. Polishook55, R. Poncy56, Y. Revaz57, C. Rinner31, M. Rocca11, A. Roche11, D. Romeuf11, R. Roy58, H. Saguin11, P. -
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THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 47, NUMBER 1, A.D. 2020 JANUARY-MARCH 1. SECTION NEWS: COLLABORATIVE ASTEROID PHOTOMETRY FOR STAFFING CHANGES FOR ASTEROID 2051 CHANG THE MINOR PLANET BULLETIN Alessandro Marchini Frederick Pilcher Astronomical Observatory, DSFTA - University of Siena (K54) Minor Planets Section Recorder Via Roma 56, 53100 - Siena, ITALY [email protected] [email protected] One staffing change and one staffing addition for The Minor Planet Bulletin are announced effective with this issue. Riccardo Papini, Massimo Banfi, Fabio Salvaggio Wild Boar Remote Observatory (K49) MPB Distributor Derald Nye is now retired from his 37 years of San Casciano in Val di Pesa (FI), ITALY service to the Minor Planets Bulletin. Derald stepped in to service at the time the MPB made its transition from the original Editor Melissa N. Hayes-Gehrke, Eric Yates and Section founder, Richard G. Hodgson. As Derald reflected in Department of Astronomy, University of Maryland a short essay written in MPB 40, page 53 (2013), the Distributor College Park, MD, USA 20740 position was the longest job he ever held, having retired from being a programmer for 30 years with IBM. (Work for IBM (Received: 2019 October 15) included programming for the space program.) At its peak, Derald was managing nearly 200 subscriptions. That number dropped to Photometric observations of this main-belt asteroid were the dozen or so libraries maintaining a permanent collection conducted in order to determine its rotation period. The following the MPB transitioning to becoming an on-line electronic authors found a synodic rotation period of 12.013 ± journal with limited printing. -
000001 – 004000
ELEMENTS AND OPPOSITION DATES IN 2019 ecliptic and equinox 2000.0, epoch 2019 nov. 13.0 tt Planet H G M ω Ω i e µ a TE Oppos. V m ◦ ◦ ◦ ◦ ◦ 1 Ceres 3.34 0.12 119.82381 73.83775 80.30381 10.59227 0.0766486 0.21382049 2.7697241 19 5 29.5 7.0 2 Pallas 4.13 0.11 102.34880 310.11514 173.06521 34.83144 0.2302254 0.21343666 2.7730436 19 4 19.7 8.0 3 Juno 5.33 0.32 80.16992 248.10327 169.85020 12.99008 0.2569240 0.22607900 2.6686763 19 — — 4 Vesta 3.20 0.32 150.08773 150.81931 103.80943 7.14181 0.0886118 0.27154209 2.3618081 19 11 14.4 6.5 5 Astraea 6.85 X 330.11215 358.66021 141.57172 5.36711 0.1910347 0.23861125 2.5743965 19 — — 6 Hebe 5.71 0.24 138.43724 239.76676 138.64111 14.73917 0.2031156 0.26103397 2.4247746 19 — — 7 Iris 5.51 X 193.93164 145.25948 259.56318 5.52359 0.2308299 0.26741555 2.3860431 19 4 2.7 9.5 8 Flora 6.49 0.28 255.13638 285.32867 110.87666 5.88846 0.1560358 0.30157711 2.2022695 19 5 13.8 9.8 9 Metis 6.28 0.17 330.40220 6.37267 68.90957 5.57674 0.1232185 0.26742705 2.3859747 19 10 27.6 8.6 10 Hygiea 5.43 X 187.50982 312.37901 283.19878 3.83172 0.1122683 0.17695679 3.1421330 19 11 25.9 10.3 11 Parthenope 6.55 X 330.37882 195.37875 125.52860 4.63112 0.1002229 0.25647388 2.4534316 19 5 16.0 9.7 12 Victoria 7.24 0.22 188.58207 69.66124 235.40635 8.37272 0.2202999 0.27638851 2.3341175 19 — — 13 Egeria 6.74 X 235.23502 80.49624 43.21994 16.53617 0.0852529 0.23841640 2.5757990 19 9 8.1 10.8 14 Irene 6.30 X 212.36883 97.83775 86.12300 9.12162 0.1663937 0.23700714 2.5859994 19 10 21.0 10.6 15 Eunomia 5.28 0.23 329.17049 98.58234 -
British Astronomical Association Handbook 2009
THE HANDBOOK OF THE BRITISH ASTRONOMICAL ASSOCIATION 2009 2008 October ISSN 0068-130-X CONTENTS CALENDAR 2009 . 2 PREFACE. 3 EDITOR’S NOTES REGARDING THE HANDBOOK SURVEY . 4 HIGHLIGHTS FOR 2009. 5-6 SKY DIARY FOR 2009 . 7 VISIBILITY OF PLANETS. 8 RISING AND SETTING OF THE PLANETS IN LATITUDES 52°N AND 35°S. 9-10 ECLIPSES . 11-14 TIME. 15-16 EARTH AND SUN. 17-19 MOON . 20 SUN’S SELENOGRAPHIC COLONGITUDE. 21 MOONRISE AND MOONSET . 22-25 & 140 LUNAR OCCULTATIONS . 26-34 GRAZING LUNAR OCCULTATIONS. 35-36 PLANETS – EXPLANATION OF TABLES. 37 APPEARANCE OF PLANETS. 38 MERCURY. 39-40 VENUS. 41 MARS. 42-43 ASTEROIDS AND DWARF PLANETS. 44-63 JUPITER . 64-67 SATELLITES OF JUPITER . 68-88 SATURN. 89-92 SATELLITES OF SATURN . 93-100 URANUS. 101 NEPTUNE. 102 COMETS. 103-114 METEOR DIARY . 115-117 VARIABLE STARS . 118-123 Algol; λ Tauri; RZ Cassiopeiae; Mira Stars; IP Pegasi EPHEMERIDES OF DOUBLE STARS . 124-125 BRIGHT STARS . 126 GALAXIES . 127-128 SUN, MOON AND PLANETS: Physical data. 129 SATELLITES (NATURAL): Physical and orbital data . 130-131 ELEMENTS OF PLANETARY ORBITS . 132 INTERNET RESOURCES. 133-134 CONVERSION FORMULAE AND ERRATA . 134 RADIO TIME SIGNALS. 135 PROGRAM AND DATA LIBRARY . 136 ASTRONOMICAL AND PHYSICAL CONSTANTS . 137-138 MISCELLANEOUS DATA AND TELESCOPE DATA . 139 GREEK ALPHABET . .. 139 Front Cover: The Crab Nebula, M1 (NGC 1952) in Taurus. Imaged in January 2008 by Andrea Tasseli from Lincoln, UK. Intes-Micro M809 8 inch (203mm) f/10 Maksutov-Cassegrain with Starlight Xpress SXV-H9 CCD and Astronomik filter set. Image = L (56x120s) and RHaGB (45x60s). -
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A&A 551, A67 (2013) Astronomy DOI: 10.1051/0004-6361/201220701 & c ESO 2013 Astrophysics Asteroids’ physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution J. Hanuš1,J.Durechˇ 1,M.Brož1, A. Marciniak2,B.D.Warner3, F. Pilcher4, R. Stephens5,R.Behrend6, B. Carry7, D. Capekˇ 8, P. Antonini9,M.Audejean10, K. Augustesen11,E.Barbotin12, P. Baudouin13, A. Bayol11, L. Bernasconi14, W. Borczyk2, J.-G. Bosch15, E. Brochard16,L.Brunetto17,S.Casulli18, A. Cazenave12, S. Charbonnel12, B. Christophe19,F.Colas20, J. Coloma21, M. Conjat22, W. Cooney23, H. Correira24,V.Cotrez25, A. Coupier11, R. Crippa26, M. Cristofanelli17,Ch.Dalmas11, C. Danavaro11, C. Demeautis27,T.Droege28,R.Durkee29, N. Esseiva30, M. Esteban11, M. Fagas2,G.Farroni31,M.Fauvaud12,32,S.Fauvaud12,32, F. Del Freo11,L.Garcia11,S.Geier33,34, C. Godon11, K. Grangeon11,H.Hamanowa35,H.Hamanowa35,N.Heck20, S. Hellmich36, D. Higgins37, R. Hirsch2, M. Husarik38,T.Itkonen39,O.Jade11,K.Kaminski´ 2,P.Kankiewicz40,A.Klotz41,42,R.A.Koff43, A. Kryszczynska´ 2, T. Kwiatkowski2,A.Laffont11,A.Leroy12, J. Lecacheux44, Y. Leonie11,C.Leyrat44,F.Manzini45, A. Martin11, G. Masi11, D. Matter11, J. Michałowski46,M.J.Michałowski47, T. Michałowski2, J. Michelet48, R. Michelsen11, E. Morelle49, S. Mottola36,R.Naves50,J.Nomen51,J.Oey52,W.Ogłoza53, A. Oksanen49, D. Oszkiewicz34,54, P. Pääkkönen39,M.Paiella11, H. Pallares11,J.Paulo11,M.Pavic11, B. Payet11,M.Polinska´ 2, D. Polishook55, R. Poncy56,Y.Revaz57,C.Rinner31, M. Rocca11,A.Roche11,D.Romeuf11,R.Roy58, H. Saguin11,P.A.Salom11, S. -
Thermophysical Modeling of Main-Belt Asteroids from WISE Thermal Data
Thermophysical modeling of main-belt asteroids from WISE thermal data a, b a c J. Hanuˇs ∗, M. Delbo’ , J. Durechˇ , V. Al´ı-Lagoa aAstronomical Institute, Faculty of Mathematics and Physics, Charles University, V Holeˇsoviˇck´ach 2, 18000 Prague, Czech Republic bUniversit´eCˆote d’Azur, CNRS–Lagrange, Observatoire de la Cˆote d’Azur, CS 34229 – F 06304 NICE Cedex 4, France cMax-Planck-Institut f¨ur extraterrestrische Physik, Giessenbachstraße, Postfach 1312, 85741 Garching, Germany Abstract By means of a varied-shape thermophysical model of Hanusˇ et al. (2015, Icarus, Volume 256) that takes into account asteroid shape and pole uncertainties, we analyze the thermal infrared data acquired by the NASA’s Wide-field Infrared Survey Explorer of about 300 asteroids with derived convex shape models. We utilize publicly available convex shape models and rotation states as input for the thermophysical modeling. For more than one hundred asteroids, the thermophysical modeling gives us an acceptable fit to the thermal infrared data allowing us to report their thermophysical properties such as size, thermal inertia, surface roughness or visible geometric albedo. This work more than doubles the number of asteroids with determined thermophysical properties, especially the thermal inertia. In the remaining cases, the shape model and pole orientation uncertainties, specific rotation or thermophysical properties, poor thermal infrared data or their coverage prevent the determination of reliable thermophysical properties. Finally, we present the main results of the statistical study of derived thermophysical parameters within the whole population of main-belt asteroids and within few asteroid families. Our sizes based on TPM are, in average, consistent with the radiometric sizes reported by Mainzer et al. -
Characterization of Thermal Inertia
Thermophysical Investigation of Asteroid Surfaces I: Characterization of Thermal Inertia Eric M. MacLennana,b,∗, Joshua P. Emerya,c aEarth and Planetary Sciences Department, Planetary Geosciences Institute, The University of Tennessee, Knoxville, TN 37996, USA bDepartment of Physics, P.O. Box 64, 00560 University of Helsinki, Finland cDepartment of Physics and Astronomy, Northern Arizona University, NAU Box 6010, Flagstaff, AZ 86011, USA Abstract The thermal inertia of an asteroid is an indicator of the thermophysical properties of the regolith and is determined by the size of grains on the surface. Previous thermophysical modeling studies of asteroids have identified or suggested that object size, rotation period, and heliocentric distance (a proxy for temperature) are important factors that separately in- fluence thermal inertia. In this work we present new thermal inertia values for 239 asteroids and model all three factors in a multi-variate model of thermal inertia. Using multi-epoch infrared data of this large set of objects observed by WISE, we derive the size, albedo, ther- mal inertia, surface roughness, and sense of spin using a thermophysical modelling approach that doesn't require a priori knowledge of an object's shape or spin axis direction. Our thermal inertia results are consistent with previous values from the literature for similarly sized asteroids, and we identify an excess of retrograde rotators among main-belt asteroids < 8 km. We then combine our results with thermal inertias of 220 objects from the litera- ture to construct a multi-variate model and quantify the dependency on asteroid diameter, rotation period, and surface temperature. This multi-variate model, which accounts for co-dependencies between the three independent variables, identifies asteroid diameter and surface temperature as strong controls on thermal inertia. -
The Minor Planet Bulletin (Warner Et Al., 2015)
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 42, NUMBER 3, A.D. 2015 JULY-SEPTEMBER 155. ROTATION PERIOD DETERMINATION period lightcurve with a most likely value of 30.7 days (737 FOR 1220 CROCUS hours). He noted that periods of 20.47 and 15.35 days (491 hours and 368 hours, respectively) were also compatible with his data. Frederick Pilcher His lightcurves of 1984 Feb 7-9 showed a second period of 7.90 Organ Mesa Observatory hours with an amplitude 0.15 magnitudes. Jacobson and Scheeres 4438 Organ Mesa Loop (2011) describe how, following rotational spin-up and fissioning, Las Cruces, NM 88011 USA an asteroid binary system can evolve by angular momentum [email protected] transfer into a system in which the primary acquires a long rotation period and the satellite has a long orbital revolution period around Vladimir Benishek the primary and short rotation period. Warner et al. (2015) list Belgrade Astronomical Observatory 1220 Crocus as one of eight systems in which a slowly rotating Volgina 7, 11060 Belgrade 38, SERBIA primary may have a satellite. The several authors of this paper agreed to collaborate in a search to confirm the existence of the Lorenzo Franco short period and obtain a reliable value for the large amplitude Balzaretto Observatory (A81), Rome, ITALY long period. A. W. Harris Observers Vladimir Benishek at Sopot Observatory, Lorenzo More Data! Franco at Balzaretto Observatory, Daniel Klinglesmith III and La Canada, CA USA Jesse Hanowell at Etscorn Campus Observatory, Caroline Odden and colleagues at Phillips Academy Observatory, and Frederick Daniel A.