Appendix 1 897 Discoverers in Alphabetical Order
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ESO's VLT Sphere and DAMIT
ESO’s VLT Sphere and DAMIT ESO’s VLT SPHERE (using adaptive optics) and Joseph Durech (DAMIT) have a program to observe asteroids and collect light curve data to develop rotating 3D models with respect to time. Up till now, due to the limitations of modelling software, only convex profiles were produced. The aim is to reconstruct reliable nonconvex models of about 40 asteroids. Below is a list of targets that will be observed by SPHERE, for which detailed nonconvex shapes will be constructed. Special request by Joseph Durech: “If some of these asteroids have in next let's say two years some favourable occultations, it would be nice to combine the occultation chords with AO and light curves to improve the models.” 2 Pallas, 7 Iris, 8 Flora, 10 Hygiea, 11 Parthenope, 13 Egeria, 15 Eunomia, 16 Psyche, 18 Melpomene, 19 Fortuna, 20 Massalia, 22 Kalliope, 24 Themis, 29 Amphitrite, 31 Euphrosyne, 40 Harmonia, 41 Daphne, 51 Nemausa, 52 Europa, 59 Elpis, 65 Cybele, 87 Sylvia, 88 Thisbe, 89 Julia, 96 Aegle, 105 Artemis, 128 Nemesis, 145 Adeona, 187 Lamberta, 211 Isolda, 324 Bamberga, 354 Eleonora, 451 Patientia, 476 Hedwig, 511 Davida, 532 Herculina, 596 Scheila, 704 Interamnia Occultation Event: Asteroid 10 Hygiea – Sun 26th Feb 16h37m UT The magnitude 11 asteroid 10 Hygiea is expected to occult the magnitude 12.5 star 2UCAC 21608371 on Sunday 26th Feb 16h37m UT (= Mon 3:37am). Magnitude drop of 0.24 will require video. DAMIT asteroid model of 10 Hygiea - Astronomy Institute of the Charles University: Josef Ďurech, Vojtěch Sidorin Hygiea is the fourth-largest asteroid (largest is Ceres ~ 945kms) in the Solar System by volume and mass, and it is located in the asteroid belt about 400 million kms away. -
Occuttau'on3newsteter
Occuttau'on3Newsteter Volume III, Number 5 September, 1983 Occultation Newsletter is pub?ished by the International Occultation Timing Association. Editor and Compos- itor: H. F. DaBo11; 6 N 106 white Oak Lane; St. Charles, IL 60174; U. S. A. Please send editorial matters, renewals, address changes, and reimbursement requests to the above, but for new memberships, new subscrip- tions, back issues, and any special requests, write to IOTA; P. 0. Box 3392; Columbus, OH 43210-0392; U.S.A. FROM THE PUBLISHER this page. William Stein, Fredericksburg, VA, has volunteered to take over Berton Stevens' job of This is the third issue of 1983. maintaining IOTA'S machine-readable records for pro- ducing address labels and station card input for lu- Please note the changes wrought by the recent chang- nar grazing occultation and local planetary/aster- es of officers; see the masthead and IOTA NEWS. The oidal appulse predictions. Since some software dc- Tinley Park address should no longer be used. The ve1oµnent is needed, Stevens will continue to do St. Charles address should be used for editorial this work at least for another month. When Stein matters, renewals, address changes, and reimburse- assumes the job, he will update the files according ment requests. The Columbus address should be used to data supplied by DaBo11. for new memberships, new subscriptions, back issues, b ' W, , and any special requests. A copy of IOTA'S by-laws is enclosed with this is- sue, for manbers. Also enclosed with this issue, o.n.'s price is $1.40/issue, or $5.50/year (4 is- for members, is a ballot, and envelope for sending sues) including first class surface mailing. -
The Minor Planet Bulletin
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 36, NUMBER 3, A.D. 2009 JULY-SEPTEMBER 77. PHOTOMETRIC MEASUREMENTS OF 343 OSTARA Our data can be obtained from http://www.uwec.edu/physics/ AND OTHER ASTEROIDS AT HOBBS OBSERVATORY asteroid/. Lyle Ford, George Stecher, Kayla Lorenzen, and Cole Cook Acknowledgements Department of Physics and Astronomy University of Wisconsin-Eau Claire We thank the Theodore Dunham Fund for Astrophysics, the Eau Claire, WI 54702-4004 National Science Foundation (award number 0519006), the [email protected] University of Wisconsin-Eau Claire Office of Research and Sponsored Programs, and the University of Wisconsin-Eau Claire (Received: 2009 Feb 11) Blugold Fellow and McNair programs for financial support. References We observed 343 Ostara on 2008 October 4 and obtained R and V standard magnitudes. The period was Binzel, R.P. (1987). “A Photoelectric Survey of 130 Asteroids”, found to be significantly greater than the previously Icarus 72, 135-208. reported value of 6.42 hours. Measurements of 2660 Wasserman and (17010) 1999 CQ72 made on 2008 Stecher, G.J., Ford, L.A., and Elbert, J.D. (1999). “Equipping a March 25 are also reported. 0.6 Meter Alt-Azimuth Telescope for Photometry”, IAPPP Comm, 76, 68-74. We made R band and V band photometric measurements of 343 Warner, B.D. (2006). A Practical Guide to Lightcurve Photometry Ostara on 2008 October 4 using the 0.6 m “Air Force” Telescope and Analysis. Springer, New York, NY. located at Hobbs Observatory (MPC code 750) near Fall Creek, Wisconsin. -
1620 Geographos and 433 Eros: Shaped by Planetary Tides?
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server 1620 Geographos and 433 Eros: Shaped by Planetary Tides? W. F. Bottke, Jr. Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853-6801 D. C. Richardson Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 P. Michel Osservatorio Astronomico di Torino, Strada Osservatorio 20, 10025 Pino Torinese (TO), Italy and S. G. Love Jet Propulsion Laboratory, California Institute of Technology, M/S 306-438, 4800 Oak Grove Drive, Pasadena, CA 91109-8099 Received 23 September 1998; accepted 10 December 1998 –2– ABSTRACT Until recently, most asteroids were thought to be solid bodies whose shapes were determined largely by collisions with other asteroids (Davis et al., 1989). It now seems that many asteroids are little more than rubble piles, held together by self-gravity (Burns 1998); this means that their shapes may be strongly distorted by tides during close encounters with planets. Here we report on numerical simulations of encounters between a ellipsoid-shaped rubble-pile asteroid and the Earth. After an encounter, many of the simulated asteroids develop the same rotation rate and distinctive shape (i.e., highly elongated with a single convex side, tapered ends, and small protuberances swept back against the rotation direction) as 1620 Geographos. Since our numerical studies show that these events occur with some frequency, we suggest that Geographos may be a tidally distorted object. In addition, our work shows that 433 Eros, which will be visited by the NEAR spacecraft in 1999, is much like Geographos, which suggests that it too may have been molded by tides in the past. -
Ty996i the Astronomical Journal Volume 71, Number
coPC THE ASTRONOMICAL JOURNAL VOLUME 71, NUMBER 6 AUGUST 1966 TY996I Observations of Comets, Minor Planets, and Satellites Elizabeth Roemer* and Richard E. Lloyd U. S. Naval Observatory, Flagstaff Station, Arizona (Received 10 May 1966) Accurate positions and descriptive notes are presented for 38 comets, 33 minor planets, 5 faint natural satellites, and Pluto, for which astrometric reduction of the series of Flagstaff observations has been completed. THE 1022 positions and descriptive notes presented reference star positions; therefore, she bears responsi- here supplement those given by Roemer (1965), bility for the accuracy of the results given here. who also described the program, the equipment used, Coma diameters and tail dimensions given in the and the procedures of observation and of reduction. Notes to Table I refer to the exposures taken for In this paper as in the earlier one, the participation astrometric purposes unless otherwise stated. In of those who shared in critical phases of the work is general, longer exposures show more extensive head and indicated in the Obs/Meas column of Table I according tail structure. to the following letters: For brighter comets the minimum exposure is determined by the necessity of recording measurable R=Elizabeth Roemer. images of 12th-13th magnitude reference stars. On Part-time assistants under contract Nonr-3342(00) such exposures the position of the nuclear condensation with Lowell Observatory: may be more or less obscured by the overexposed coma and be correspondingly difficult and uncertain to L = Richard E. Lloyd, measure. T = Maryanna Thomas, A colon has been used to indicate greater than normal S = Marjorie K. -
On the Accuracy of Restricted Three-Body Models for the Trojan Motion
DISCRETE AND CONTINUOUS Website: http://AIMsciences.org DYNAMICAL SYSTEMS Volume 11, Number 4, December 2004 pp. 843{854 ON THE ACCURACY OF RESTRICTED THREE-BODY MODELS FOR THE TROJAN MOTION Frederic Gabern1, Angel` Jorba1 and Philippe Robutel2 Departament de Matem`aticaAplicada i An`alisi Universitat de Barcelona Gran Via 585, 08007 Barcelona, Spain1 Astronomie et Syst`emesDynamiques IMCCE-Observatoire de Paris 77 Av. Denfert-Rochereau, 75014 Paris, France2 Abstract. In this note we compare the frequencies of the motion of the Trojan asteroids in the Restricted Three-Body Problem (RTBP), the Elliptic Restricted Three-Body Problem (ERTBP) and the Outer Solar System (OSS) model. The RTBP and ERTBP are well-known academic models for the motion of these asteroids, and the OSS is the standard model used for realistic simulations. Our results are based on a systematic frequency analysis of the motion of these asteroids. The main conclusion is that both the RTBP and ERTBP are not very accurate models for the long-term dynamics, although the level of accuracy strongly depends on the selected asteroid. 1. Introduction. The Restricted Three-Body Problem models the motion of a particle under the gravitational attraction of two point masses following a (Keple- rian) solution of the two-body problem (a general reference is [17]). The goal of this note is to discuss the degree of accuracy of such a model to study the real motion of an asteroid moving near the Lagrangian points of the Sun-Jupiter system. To this end, we have considered two restricted three-body problems, namely: i) the Circular RTBP, in which Sun and Jupiter describe a circular orbit around their centre of mass, and ii) the Elliptic RTBP, in which Sun and Jupiter move on an elliptic orbit. -
(704) Interamnia from Its Occultations and Lightcurves
International Journal of Astronomy and Astrophysics, 2014, 4, 91-118 Published Online March 2014 in SciRes. http://www.scirp.org/journal/ijaa http://dx.doi.org/10.4236/ijaa.2014.41010 A 3-D Shape Model of (704) Interamnia from Its Occultations and Lightcurves Isao Satō1*, Marc Buie2, Paul D. Maley3, Hiromi Hamanowa4, Akira Tsuchikawa5, David W. Dunham6 1Astronomical Society of Japan, Yamagata, Japan 2Southwest Research Institute, Boulder, USA 3International Occultation Timing Association, Houston, USA 4Hamanowa Astronomical Observatory, Fukushima, Japan 5Yanagida Astronomical Observatory, Ishikawa, Japan 6International Occultation Timing Association, Greenbelt, USA Email: *[email protected], [email protected], [email protected], [email protected], [email protected], [email protected] Received 9 November 2013; revised 9 December 2013; accepted 17 December 2013 Copyright © 2014 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract A 3-D shape model of the sixth largest of the main belt asteroids, (704) Interamnia, is presented. The model is reproduced from its two stellar occultation observations and six lightcurves between 1969 and 2011. The first stellar occultation was the occultation of TYC 234500183 on 1996 De- cember 17 observed from 13 sites in the USA. An elliptical cross section of (344.6 ± 9.6 km) × (306.2 ± 9.1 km), for position angle P = 73.4 ± 12.5˚ was fitted. The lightcurve around the occulta- tion shows that the peak-to-peak amplitude was 0.04 mag. and the occultation phase was just be- fore the minimum. -
Observations from Orbiting Platforms 219
Dotto et al.: Observations from Orbiting Platforms 219 Observations from Orbiting Platforms E. Dotto Istituto Nazionale di Astrofisica Osservatorio Astronomico di Torino M. A. Barucci Observatoire de Paris T. G. Müller Max-Planck-Institut für Extraterrestrische Physik and ISO Data Centre A. D. Storrs Towson University P. Tanga Istituto Nazionale di Astrofisica Osservatorio Astronomico di Torino and Observatoire de Nice Orbiting platforms provide the opportunity to observe asteroids without limitation by Earth’s atmosphere. Several Earth-orbiting observatories have been successfully operated in the last decade, obtaining unique results on asteroid physical properties. These include the high-resolu- tion mapping of the surface of 4 Vesta and the first spectra of asteroids in the far-infrared wave- length range. In the near future other space platforms and orbiting observatories are planned. Some of them are particularly promising for asteroid science and should considerably improve our knowledge of the dynamical and physical properties of asteroids. 1. INTRODUCTION 1800 asteroids. The results have been widely presented and discussed in the IRAS Minor Planet Survey (Tedesco et al., In the last few decades the use of space platforms has 1992) and the Supplemental IRAS Minor Planet Survey opened up new frontiers in the study of physical properties (Tedesco et al., 2002). This survey has been very important of asteroids by overcoming the limits imposed by Earth’s in the new assessment of the asteroid population: The aster- atmosphere and taking advantage of the use of new tech- oid taxonomy by Barucci et al. (1987), its recent extension nologies. (Fulchignoni et al., 2000), and an extended study of the size Earth-orbiting satellites have the advantage of observing distribution of main-belt asteroids (Cellino et al., 1991) are out of the terrestrial atmosphere; this allows them to be in just a few examples of the impact factor of this survey. -
HUBBLE ULTRAVIOLET SPECTROSCOPY of JUPITER TROJANS Ian Wong1†, Michael E
Draft version March 11, 2019 Preprint typeset using LATEX style emulateapj v. 12/16/11 HUBBLE ULTRAVIOLET SPECTROSCOPY OF JUPITER TROJANS Ian Wong1y, Michael E. Brown2, Jordana Blacksberg3, Bethany L. Ehlmann2,3, and Ahmed Mahjoub3 1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; [email protected] 2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA y51 Pegasi b Postdoctoral Fellow Draft version March 11, 2019 ABSTRACT We present the first ultraviolet spectra of Jupiter Trojans. These observations were carried out using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope and cover the wavelength range 200{550 nm at low resolution. The targets include objects from both of the Trojan color sub- populations (less-red and red). We do not observe any discernible absorption features in these spectra. Comparisons of the averaged UV spectra of less-red and red targets show that the subpopulations are spectrally distinct in the UV. Less-red objects display a steep UV slope and a rollover at around 450 nm to a shallower visible slope, whereas red objects show the opposite trend. Laboratory spectra of irradiated ices with and without H2S exhibit distinct UV absorption features; consequently, the featureless spectra observed here suggest H2S alone is not responsible for the observed color bimodal- ity of Trojans, as has been previously hypothesized. We propose some possible explanations for the observed UV-visible spectra, including complex organics, space weathering of iron-bearing silicates, and masked features due to previous cometary activity. -
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. -
Asteroid Regolith Weathering: a Large-Scale Observational Investigation
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 5-2019 Asteroid Regolith Weathering: A Large-Scale Observational Investigation Eric Michael MacLennan University of Tennessee, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Recommended Citation MacLennan, Eric Michael, "Asteroid Regolith Weathering: A Large-Scale Observational Investigation. " PhD diss., University of Tennessee, 2019. https://trace.tennessee.edu/utk_graddiss/5467 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Eric Michael MacLennan entitled "Asteroid Regolith Weathering: A Large-Scale Observational Investigation." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Geology. Joshua P. Emery, Major Professor We have read this dissertation and recommend its acceptance: Jeffrey E. Moersch, Harry Y. McSween Jr., Liem T. Tran Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Asteroid Regolith Weathering: A Large-Scale Observational Investigation A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Eric Michael MacLennan May 2019 © by Eric Michael MacLennan, 2019 All Rights Reserved. -
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1,. ,-- ,-- ~XECKDING PAGE BLANK WT FIL,,q DYNAMICAL EVIDENCE REGARDING THE RELATIONSHIP BETWEEN ASTEROIDS AND METEORITES GEORGE W. WETHERILL Department of Temcltricrl kgnetism ~amregie~mtittition of Washington Washington, D. C. 20025 Meteorites are fragments of small solar system bodies (comets, asteroids and Apollo objects). Therefore they may be expected to provide valuable information regarding these bodies. How- ever, the identification of particular classes of meteorites with particular small bodies or classes of small bodies is at present uncertain. It is very unlikely that any significant quantity of meteoritic material is obtained from typical ac- tive comets. Relatively we1 1-studied dynamical mechanisms exist for transferring material into the vicinity of the Earth from the inner edge of the asteroid belt on an 210~-~year time scale. It seems likely that most iron meteorites are obtained in this way, and a significant yield of complementary differec- tiated meteoritic silicate material may be expected to accom- pany these differentiated iron meteorites. Insofar as data exist, photometric measurements support an association between Apollo objects and chondri tic meteorites. Because Apol lo ob- jects are in orbits which come close to the Earth, and also must be fragmented as they traverse the asteroid belt near aphel ion, there also must be a component of the meteorite flux derived from Apollo objects. Dynamical arguments favor the hypothesis that most Apollo objects are devolatilized comet resiaues. However, plausible dynamical , petrographic, and cosmogonical reasons are known which argue against the simple conclusion of this syllogism, uiz., that chondri tes are of cometary origin. Suggestions are given for future theoretical , observational, experimental investigations directed toward improving our understanding of this puzzling situation.