Photometric Observations of Asteroids Rotation Periods of five Large Main Belt Asteroids (40Km-160Km)
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Occultation Evidence for a Satellite of the Trojan Asteroid (911) Agamemnon Bradley Timerson1, John Brooks2, Steven Conard3, David W
Occultation Evidence for a Satellite of the Trojan Asteroid (911) Agamemnon Bradley Timerson1, John Brooks2, Steven Conard3, David W. Dunham4, David Herald5, Alin Tolea6, Franck Marchis7 1. International Occultation Timing Association (IOTA), 623 Bell Rd., Newark, NY, USA, [email protected] 2. IOTA, Stephens City, VA, USA, [email protected] 3. IOTA, Gamber, MD, USA, [email protected] 4. IOTA, KinetX, Inc., and Moscow Institute of Electronics and Mathematics of Higher School of Economics, per. Trekhsvyatitelskiy B., dom 3, 109028, Moscow, Russia, [email protected] 5. IOTA, Murrumbateman, NSW, Australia, [email protected] 6. IOTA, Forest Glen, MD, USA, [email protected] 7. Carl Sagan Center at the SETI Institute, 189 Bernardo Av, Mountain View CA 94043, USA, [email protected] Corresponding author Franck Marchis Carl Sagan Center at the SETI Institute 189 Bernardo Av Mountain View CA 94043 USA [email protected] 1 Keywords: Asteroids, Binary Asteroids, Trojan Asteroids, Occultation Abstract: On 2012 January 19, observers in the northeastern United States of America observed an occultation of 8.0-mag HIP 41337 star by the Jupiter-Trojan (911) Agamemnon, including one video recorded with a 36cm telescope that shows a deep brief secondary occultation that is likely due to a satellite, of about 5 km (most likely 3 to 10 km) across, at 278 km ±5 km (0.0931″) from the asteroid’s center as projected in the plane of the sky. A satellite this small and this close to the asteroid could not be resolved in the available VLT adaptive optics observations of Agamemnon recorded in 2003. -
Asteroid Shape and Spin Statistics from Convex Models J
Asteroid shape and spin statistics from convex models J. Torppa, V.-P. Hentunen, P. Pääkkönen, P. Kehusmaa, K. Muinonen To cite this version: J. Torppa, V.-P. Hentunen, P. Pääkkönen, P. Kehusmaa, K. Muinonen. Asteroid shape and spin statistics from convex models. Icarus, Elsevier, 2008, 198 (1), pp.91. 10.1016/j.icarus.2008.07.014. hal-00499092 HAL Id: hal-00499092 https://hal.archives-ouvertes.fr/hal-00499092 Submitted on 9 Jul 2010 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Accepted Manuscript Asteroid shape and spin statistics from convex models J. Torppa, V.-P. Hentunen, P. Pääkkönen, P. Kehusmaa, K. Muinonen PII: S0019-1035(08)00283-2 DOI: 10.1016/j.icarus.2008.07.014 Reference: YICAR 8734 To appear in: Icarus Received date: 18 September 2007 Revised date: 3 July 2008 Accepted date: 7 July 2008 Please cite this article as: J. Torppa, V.-P. Hentunen, P. Pääkkönen, P. Kehusmaa, K. Muinonen, Asteroid shape and spin statistics from convex models, Icarus (2008), doi: 10.1016/j.icarus.2008.07.014 This is a PDF file of an unedited manuscript that has been accepted for publication. -
14790 (Stsci Edit Number: 0, Created: Friday, July 29, 2016 2:42:55 PM EST) - Overview
Proposal 14790 (STScI Edit Number: 0, Created: Friday, July 29, 2016 2:42:55 PM EST) - Overview 14790 - Investigating the binary nature of active asteroid 288P/300163 Cycle: 24, Proposal Category: GO (Availability Mode: SUPPORTED) INVESTIGATORS Name Institution E-Mail Dr. Jessica Agarwal (PI) (ESA Member) (Conta Max Planck Institute for Solar System Research [email protected] ct) Dr. David Jewitt (CoI) (AdminUSPI) (Contact) University of California - Los Angeles [email protected] Dr. Harold A. Weaver (CoI) (Contact) The Johns Hopkins University Applied Physics Labor [email protected] atory Max Mutchler (CoI) (Contact) Space Telescope Science Institute [email protected] Dr. Stephen M. Larson (CoI) University of Arizona [email protected] VISITS Visit Targets used in Visit Configurations used in Visit Orbits Used Last Orbit Planner Run OP Current with Visit? 01 (1) 288P WFC3/UVIS 1 29-Jul-2016 15:42:51.0 yes 02 (1) 288P WFC3/UVIS 1 29-Jul-2016 15:42:52.0 yes 03 (1) 288P WFC3/UVIS 1 29-Jul-2016 15:42:53.0 yes 04 (1) 288P WFC3/UVIS 1 29-Jul-2016 15:42:54.0 yes 05 (1) 288P WFC3/UVIS 1 29-Jul-2016 15:42:54.0 yes 5 Total Orbits Used ABSTRACT We propose to study the suspected binary nature of active asteroid 288P/300163. We aim to confirm or disprove the existence of a binary nucleus, and - if confirmed - to measure the mutual orbital period and orbit orientation of the compoents, and their sizes. We request 5 orbits of WFC3 1 Proposal 14790 (STScI Edit Number: 0, Created: Friday, July 29, 2016 2:42:55 PM EST) - Overview imaging, spaced at intervals of 8-12 days. -
PACS Sky Fields and Double Sources for Photometer Spatial Calibration
Document: PACS-ME-TN-035 PACS Date: 27th July 2009 Herschel Version: 2.7 Fields and Double Sources for Spatial Calibration Page 1 PACS Sky Fields and Double Sources for Photometer Spatial Calibration M. Nielbock1, D. Lutz2, B. Ali3, T. M¨uller2, U. Klaas1 1Max{Planck{Institut f¨urAstronomie, K¨onigstuhl17, D-69117 Heidelberg, Germany 2Max{Planck{Institut f¨urExtraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany 3NHSC, IPAC, California Institute of Technology, Pasadena, CA 91125, USA Document: PACS-ME-TN-035 PACS Date: 27th July 2009 Herschel Version: 2.7 Fields and Double Sources for Spatial Calibration Page 2 Contents 1 Scope and Assumptions 4 2 Applicable and Reference Documents 4 3 Stars 4 3.1 Optical Star Clusters . .4 3.2 Bright Binaries (V -band search) . .5 3.3 Bright Binaries (K-band search) . .5 3.4 Retrieval from PACS Pointing Calibration Target List . .5 3.5 Other stellar sources . 13 3.5.1 Herbig Ae/Be stars observed with ISOPHOT . 13 4 Galactic ISOCAM fields 13 5 Galaxies 13 5.1 Quasars and AGN from the Veron catalogue . 13 5.2 Galaxy pairs . 14 5.2.1 Galaxy pairs from the IRAS Bright Galaxy Sample with VLA radio observations 14 6 Solar system objects 18 6.1 Asteroid conjunctions . 18 6.2 Conjunctions of asteroids with pointing stars . 22 6.3 Planetary satellites . 24 Appendices 26 A 2MASS images of fields with suitable double stars from the K-band 26 B HIRES/2MASS overlays for double stars from the K-band search 32 C FIR/NIR overlays for double galaxies 38 C.1 HIRES/2MASS overlays for double galaxies . -
Olivine-Dominated Asteroids and Meteorites: Distinguishing Nebular and Igneous Histories
Meteoritics & Planetary Science 42, Nr 2, 155–170 (2007) Abstract available online at http://meteoritics.org Olivine-dominated asteroids and meteorites: Distinguishing nebular and igneous histories Jessica M. SUNSHINE1*, Schelte J. BUS2, Catherine M. CORRIGAN3, Timothy J. MCCOY4, and Thomas H. BURBINE5 1Department of Astronomy, University of Maryland, College Park, Maryland 20742, USA 2University of Hawai‘i, Institute for Astronomy, Hilo, Hawai‘i 96720, USA 3Johns Hopkins University, Applied Physics Laboratory, Laurel, Maryland 20723–6099, USA 4Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560–0119, USA 5Department of Astronomy, Mount Holyoke College, South Hadley, Massachusetts 01075, USA *Corresponding author. E-mail: [email protected] (Received 14 February 2006; revision accepted 19 November 2006) Abstract–Melting models indicate that the composition and abundance of olivine systematically co-vary and are therefore excellent petrologic indicators. However, heliocentric distance, and thus surface temperature, has a significant effect on the spectra of olivine-rich asteroids. We show that composition and temperature complexly interact spectrally, and must be simultaneously taken into account in order to infer olivine composition accurately. We find that most (7/9) of the olivine- dominated asteroids are magnesian and thus likely sampled mantles differentiated from ordinary chondrite sources (e.g., pallasites). However, two other olivine-rich asteroids (289 Nenetta and 246 Asporina) are found to be more ferroan. Melting models show that partial melting cannot produce olivine-rich residues that are more ferroan than the chondrite precursor from which they formed. Thus, even moderately ferroan olivine must have non-ordinary chondrite origins, and therefore likely originate from oxidized R chondrites or melts thereof, which reflect variations in nebular composition within the asteroid belt. -
Solar System Objects Observed with TESS--First Data Release: Bright Main-Belt and Trojan Asteroids from the Southern Survey
Draft version January 17, 2020 Preprint typeset using LATEX style AASTeX6 v. 1.0 SOLAR SYSTEM OBJECTS OBSERVED WITH TESS – FIRST DATA RELEASE: BRIGHT MAIN-BELT AND TROJAN ASTEROIDS FROM THE SOUTHERN SURVEY Andras´ Pal´ 1,2,3, Robert´ Szakats´ 1, Csaba Kiss1, Attila Bodi´ 1,4, Zsofia´ Bognar´ 1,4, Csilla Kalup2,1, Laszl´ o´ L. Kiss1, Gabor´ Marton1, Laszl´ o´ Molnar´ 1,4, Emese Plachy1,4, Krisztian´ Sarneczky´ 1, Gyula M. Szabo´5,6, and Robert´ Szabo´1,4 1Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Mikl´os ´ut 15-17, Hungary 2E¨otv¨os Lor´and University, H-1117 P´azm´any P´eter s´et´any 1/A, Budapest, Hungary 3MIT Kavli Institute for Astrophysics and Space Research, 70 Vassar Street, Cambridge, MA 02109, USA 4MTA CSFK Lend¨ulet Near-Field Cosmology Research Group 5ELTE E¨otv¨os Lor´and University, Gothard Astrophysical Observatory, Szombathely, Hungary 6MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary ABSTRACT Compared with previous space-borne surveys, the Transiting Exoplanet Survey Satellite (TESS) pro- vides a unique and new approach to observe Solar System objects. While its primary mission avoids the vicinity of the ecliptic plane by approximately six degrees, the scale height of the Solar System debris disk is large enough to place various small body populations in the field-of-view. In this paper we present the first data release of photometric analysis of TESS observations of small Solar System Bodies, focusing on the bright end of the observed main-belt asteroid and Jovian Trojan popula- tions. -
Color Study of Asteroid Families Within the MOVIS Catalog David Morate1,2, Javier Licandro1,2, Marcel Popescu1,2,3, and Julia De León1,2
A&A 617, A72 (2018) Astronomy https://doi.org/10.1051/0004-6361/201832780 & © ESO 2018 Astrophysics Color study of asteroid families within the MOVIS catalog David Morate1,2, Javier Licandro1,2, Marcel Popescu1,2,3, and Julia de León1,2 1 Instituto de Astrofísica de Canarias (IAC), C/Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain e-mail: [email protected] 2 Departamento de Astrofísica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain 3 Astronomical Institute of the Romanian Academy, 5 Cu¸titulde Argint, 040557 Bucharest, Romania Received 6 February 2018 / Accepted 13 March 2018 ABSTRACT The aim of this work is to study the compositional diversity of asteroid families based on their near-infrared colors, using the data within the MOVIS catalog. As of 2017, this catalog presents data for 53 436 asteroids observed in at least two near-infrared filters (Y, J, H, or Ks). Among these asteroids, we find information for 6299 belonging to collisional families with both Y J and J Ks colors defined. The work presented here complements the data from SDSS and NEOWISE, and allows a detailed description− of− the overall composition of asteroid families. We derived a near-infrared parameter, the ML∗, that allows us to distinguish between four generic compositions: two different primitive groups (P1 and P2), a rocky population, and basaltic asteroids. We conducted statistical tests comparing the families in the MOVIS catalog with the theoretical distributions derived from our ML∗ in order to classify them according to the above-mentioned groups. We also studied the background populations in order to check how similar they are to their associated families. -
Accurate Positions of Asteroids Observed in Bucharest During the Year 1931
ACCURATE POSITIONS OF ASTEROIDS OBSERVED IN BUCHAREST DURING THE YEAR 1931 GHEORGHE BOCŞA, MIHAELA LICULESCU, PETRE POPESCU Astronomical Institute of the Romanian Academy Str. Cuţitul de Argint 5, 040557 Bucharest, Romania E-mail: [email protected] Abstract. The paper contains the observations of minor planets performed in 1931 in Bucharest Astronomical Observatory with 380/6000 mm astrograph. Both Turner’s (constants) and Schlesinger’s (dependences) methods were used in the computation of the normal coordinates of the objects. Keywords: photographic astrometry – minor planets. 1. INTRODUCTION At Bucharest Observatory, within the framework of the Wide-Field Plate Archive Programme, part of the activities of the IAU Commission 9, 13 000 plates were catalogued. They were obtained through a systematic work beginning with the year 1930 until now, by means of the Prin-Merz refractor (f = 6 m, D = 38 cm). After a careful investigation of the whole plate archive, among other things, we discovered that a series of observations were not capitalized, such as a set of minor planets that were observed during 1930–1955. The lack of accurate star catalogues containing positions and proper motions, was one of the reasons for which the completion of the reductions has been neglected in that period. It is worth mentioning that the SAO Catalogue was issued starting from that period. Another thing worth mentioning is that the first Zeiss measuring machine was bought by the Observatory in 1957. However, systematic work on plate processing at Bucharest Observatory started beginning with 1956. The first paper on this subject was published by Cristescu et al. -
The Orbital Distribution of Near-Earth Objects Inside Earth’S Orbit
Icarus 217 (2012) 355–366 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus The orbital distribution of Near-Earth Objects inside Earth’s orbit ⇑ Sarah Greenstreet a, , Henry Ngo a,b, Brett Gladman a a Department of Physics & Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, British Columbia, Canada b Department of Physics, Engineering Physics, and Astronomy, 99 University Avenue, Queen’s University, Kingston, Ontario, Canada article info abstract Article history: Canada’s Near-Earth Object Surveillance Satellite (NEOSSat), set to launch in early 2012, will search for Received 17 August 2011 and track Near-Earth Objects (NEOs), tuning its search to best detect objects with a < 1.0 AU. In order Revised 8 November 2011 to construct an optimal pointing strategy for NEOSSat, we needed more detailed information in the Accepted 9 November 2011 a < 1.0 AU region than the best current model (Bottke, W.F., Morbidelli, A., Jedicke, R., Petit, J.M., Levison, Available online 28 November 2011 H.F., Michel, P., Metcalfe, T.S. [2002]. Icarus 156, 399–433) provides. We present here the NEOSSat-1.0 NEO orbital distribution model with larger statistics that permit finer resolution and less uncertainty, Keywords: especially in the a < 1.0 AU region. We find that Amors = 30.1 ± 0.8%, Apollos = 63.3 ± 0.4%, Atens = Near-Earth Objects 5.0 ± 0.3%, Atiras (0.718 < Q < 0.983 AU) = 1.38 ± 0.04%, and Vatiras (0.307 < Q < 0.718 AU) = 0.22 ± 0.03% Celestial mechanics Impact processes of the steady-state NEO population. -
The Minor Planet Bulletin 44 (2017) 142
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 44, NUMBER 2, A.D. 2017 APRIL-JUNE 87. 319 LEONA AND 341 CALIFORNIA – Lightcurves from all sessions are then composited with no TWO VERY SLOWLY ROTATING ASTEROIDS adjustment of instrumental magnitudes. A search should be made for possible tumbling behavior. This is revealed whenever Frederick Pilcher successive rotational cycles show significant variation, and Organ Mesa Observatory (G50) quantified with simultaneous 2 period software. In addition, it is 4438 Organ Mesa Loop useful to obtain a small number of all-night sessions for each Las Cruces, NM 88011 USA object near opposition to look for possible small amplitude short [email protected] period variations. Lorenzo Franco Observations to obtain the data used in this paper were made at the Balzaretto Observatory (A81) Organ Mesa Observatory with a 0.35-meter Meade LX200 GPS Rome, ITALY Schmidt-Cassegrain (SCT) and SBIG STL-1001E CCD. Exposures were 60 seconds, unguided, with a clear filter. All Petr Pravec measurements were calibrated from CMC15 r’ values to Cousins Astronomical Institute R magnitudes for solar colored field stars. Photometric Academy of Sciences of the Czech Republic measurement is with MPO Canopus software. To reduce the Fricova 1, CZ-25165 number of points on the lightcurves and make them easier to read, Ondrejov, CZECH REPUBLIC data points on all lightcurves constructed with MPO Canopus software have been binned in sets of 3 with a maximum time (Received: 2016 Dec 20) difference of 5 minutes between points in each bin. -
The Physical Characterization of the Potentially-‐Hazardous
The Physical Characterization of the Potentially-Hazardous Asteroid 2004 BL86: A Fragment of a Differentiated Asteroid Vishnu Reddy1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Email: [email protected] Bruce L. Gary Hereford Arizona Observatory, Hereford, AZ 85615, USA Juan A. Sanchez1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Driss Takir1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Cristina A. Thomas1 NASA Goddard Spaceflight Center, Greenbelt, MD 20771, USA Paul S. Hardersen1 Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USA Yenal Ogmen Green Island Observatory, Geçitkale, Mağusa, via Mersin 10 Turkey, North Cyprus Paul Benni Acton Sky Portal, 3 Concetta Circle, Acton, MA 01720, USA Thomas G. Kaye Raemor Vista Observatory, Sierra Vista, AZ 85650 Joao Gregorio Atalaia Group, Crow Observatory (Portalegre) Travessa da Cidreira, 2 rc D, 2645- 039 Alcabideche, Portugal Joe Garlitz 1155 Hartford St., Elgin, OR 97827, USA David Polishook1 Weizmann Institute of Science, Herzl Street 234, Rehovot, 7610001, Israel Lucille Le Corre1 Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719, USA Andreas Nathues Max-Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany 1Visiting Astronomer at the Infrared Telescope Facility, which is operated by the University of Hawaii under Cooperative Agreement no. NNX-08AE38A with the National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program. Pages: 27 Figures: 8 Tables: 4 Proposed Running Head: 2004 BL86: Fragment of Vesta Editorial correspondence to: Vishnu Reddy Planetary Science Institute 1700 East Fort Lowell Road, Suite 106 Tucson 85719 (808) 342-8932 (voice) [email protected] Abstract The physical characterization of potentially hazardous asteroids (PHAs) is important for impact hazard assessment and evaluating mitigation options. -
Asteroid Family Identification 613
Bendjoya and Zappalà: Asteroid Family Identification 613 Asteroid Family Identification Ph. Bendjoya University of Nice V. Zappalà Astronomical Observatory of Torino Asteroid families have long been known to exist, although only recently has the availability of new reliable statistical techniques made it possible to identify a number of very “robust” groupings. These results have laid the foundation for modern physical studies of families, thought to be the direct result of energetic collisional events. A short summary of the current state of affairs in the field of family identification is given, including a list of the most reliable families currently known. Some likely future developments are also discussed. 1. INTRODUCTION calibrate new identification methods. According to the origi- nal papers published in the literature, Brouwer (1951) used The term “asteroid families” is historically linked to the a fairly subjective criterion to subdivide the Flora family name of the Japanese researcher Kiyotsugu Hirayama, who delineated by Hirayama. Arnold (1969) assumed that the was the first to use the concept of orbital proper elements to asteroids are dispersed in the proper-element space in a identify groupings of asteroids characterized by nearly iden- Poisson distribution. Lindblad and Southworth (1971) cali- tical orbits (Hirayama, 1918, 1928, 1933). In interpreting brated their method in such a way as to find good agree- these results, Hirayama made the hypothesis that such a ment with Brouwer’s results. Carusi and Massaro (1978) proximity could not be due to chance and proposed a com- adjusted their method in order to again find the classical mon origin for the members of these groupings.