(243) Ida and Dactyl

(243) Ida and Dactyl
compiled by Wm. Robert Johnston
last updated 1 September 2005

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:

semimajor axis a:	2.86162755840448 AU
orbital period P:	4.8409 y (=1768.2 d)
eccentricity e:	0.0461649374183922
perihelion distance q:	2.72952070125599 AU
aphelion distance Q:	2.99373442 AU
inclination i:	1.13746499957824°
argument of perihelion omega:	108.550476474476°
ascending node OMEGA:	324.209454531122°
mean anomaly M:	306.752252986874°
perihelion passage TP:	2006-05-06.5271778
Epoch:	18 AUG 2005
data arc:	1885-2005 (1163 obs.)

orbital data, secondary:

semimajor axis a: 108 km [A3a]
semimajor axis/primary radius a/Rp: (6.9)
orbital period P: 1.54 d [A3a]
eccentricity e: (>=0.2?)

other data, primary:

diameter:	31.3 ± 1.2 km, mean [B96a] 59.8 x 25.4 x 18.6 km [A3c]
max./min. dimensions:	55.8 km, 14.8 km [A3c]
absolute magnitude H:	9.94 [JPL]
rotation period:	0.1930680 ± 0.0000003 d [B93a] (=4.633632 ± 0.000007 h)
amplitude delta M:	0.45-0.86 [MPb]
pole direction :	348.76° ± 7.5°, 87.10° ± 0.4° [D96a]
color index U-B:	0.416 ± 0.037 [SBa]
color index B-V:	0.802 ± 0.009 [SBa]
color index V-R:	?
color index R-I:	?
slope parameter G:	(0.15) [a]
geometric albedo:	0.20 ± 0.04 [V96a]
mass:	(4.2 ± 0.6)x10¹⁶ kg [B96a]
GM:	0.0030 km³/s² [JPL]
density:	2.7 ± 0.4 g/cm³ [P97b]
type:	S [SBd]

other data, secondary:

diameter: 1.4 km, mean [V96a]
1.6 x 1.4 x 1.2 km [V96a]
diameter ratio Ds/Dp: (0.045)
component magnitude difference: (13.5)
rotation period: ?
geometric albedo: 0.21 ± 0.02 [V96a]

--(243) Ida--discovery and notes:

Primary discovered 29 September 1884 from Vienna, Austria, by J. Palisa. Alternate designations A910 CD, 1988 DB1.

Companion discovered in images from 28 August 1993 taken by the Galileo probe during its flyby. The images were transmitted back to Earth somewhat later, and the satellite was recognized 17 February 1994 and reported 12 March 1994 by M. Belton and R. Carlson on behalf of the Galileo SSI and NIMS teams.

This image of Dactyl was taken by Galileo on 28 August 1993 from a range of 3900 km. Resolution is about 39 meters. The south pole is near the center of the unlit portion on the left. The largest crater, on the terminator (at 138°E, 39°S), is 280 meters across and has been named Acmon. A second 160-meter diameter crater at 220°E, 46°S (in shadow at lower center) is named Celmis. (Image credit: NASA/JPL)
Dactyl's orbit is poorly constrained by the available Galileo imagery. Rather, by assuming Dactyl to be in a bound orbit, constraints on Ida's mass have been found.
A shape model for Dactyl was obtained from Galileo imagery by Veverka et ali [V96a]; the maximum topographic variation from the best fit ellipsoid is 0.13 km. No evidence of rotation of Dactyl was obtained. Together with the fact that Dactyl's long axis is oriented towards Ida, this is consistent with Dactyl being in synchronous rotation with respect to Ida. Dactyl appears to be, in general, similar in composition to Ida; some slight differences, including a higher pyroxene/olivine ratio, are suggested [V96a].

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Asphaug, Erik 2003, Impact Cratering: Bridging the Gap Between Modeling and Observations Formation of Impact Craters on Comets and Asteroids: How Little is Known
Johnson, Torrence 2003, Physical Properties and Morphology of Small Solar System Bodies, 25th meeting of the IAU, Joint Discussion 19, 23 July 2003, Sydney, Australia Galileo's Exploration of Small Bodies
Granahan, James 2002, Journal of Geophysical Research (Planets) A compositional study of asteroid 243 Ida and Dactyl from Galileo NIMS and SSI observations
Merline, W. J., Close, L. M., Siegler, N., Dumas, C., Chapman, C. R., Rigaut, F., Menard, F., Owen, W. M., Slater, D. C., & Durda, D. D. 2002, Bulletin of the American Astronomical Society Discovery of a Loosely-bound Companion to Main-belt Asteroid (3749) Balam
Blanco-Cano, X., Omidi, N., & Russell, C. T. 2002, American Geophysical Union, Fall Meeting 2002, abstract #P11A-0344 Are Small Asteroids Magnetic?
Thomas, P. C. 2002, AAS/Division for Planetary Sciences Meeting Asteroid Surfaces and Interiors from NEAR and Galileo data
Slivan, S. M., Binzel, R. P., & Kaasalainen, M. 2002, AAS/Division for Planetary Sciences Meeting Obliquity Alignment and Spin Angular Momentum Clustering in the Koronis Family
Sárneczky, K. & Kereszturi, Á. 2002, Lunar and Planetary Institute Conference Abstracts ``Global'' Tectonism on Asteroids?
Blanco-Cano, X., Omidi, N., Russell, C., & Acuna, M. 2001, American Geophysical Union, Fall Meeting 2001, abstract #P12C-0510 Hybrid Simulations of solar wind interaction with magnetized asteroids: Comparisons with observations of the whistler wing
Slivan, S. M. & Binzel, R. P. 2001, American Astronomical Society, DPS meeting #33, #58.11 Remnants of Parent Body Spin State Among Koronis Family Spin-Vectors
Merline, W. J. 2001, American Astronomical Society, DPS meeting #33, #51.01 Asteroid Satellites
Thommes, E. W., Duncan, M. J., & Levison, H. F. 2001, American Astronomical Society, DDA meeting #32, #10.04 Oligarchic Growth Throughout the Protoplanetary Disk
Granahan, J. C. 2001, American Astronomical Society, DPS meeting #33, #41.06 Galileo 243 Ida System Spectral Observations Revisited
Kereszturi, A. 2001, Meteoritics & Planetary Science, vol. 36, Supplement, p.A96 Possible Similar Tectonic Structures on Ida and Eros
Consolmagno, G. J. & Britt, D. T. 2001, American Astronomical Society, DPS meeting #33, #41.03 Classifying Asteroids by Macroporosity
Nolan, Michael C., Asphaug, Erik, Greenberg, Richard, & Melosh, H. Jay 2001, Icarus, Volume 153, Issue 1, pp. 1-15 (2001). Impacts on Asteroids: Fragmentation, Regolith Transport, and Disruption
Ostro, Steven J., Nolan, Michael C., Margot, Jean-Luc, Magri, Christopher, Harris, Alan W., & Giorgini, Jon D. 2001, Icarus, Volume 152, Issue 1, pp. 201-204 (2001). NOTE: Radar Observations of Asteroid 288 Glauke
Bottke, W. F., Jr. & Greenberg, R. 2001, In: Collisional processes in the solar system, ed. by: Mikhail Ya. Marov and Hans Rickman, Astrophysics and space science library, Volume 261, Dordrecht: Kluwer Academic Publishers, ISBN 0-7923-6946-7, 2001, p. 51 - 71 The impact record on asteroid surfaces
Ivanov, B. A., Neukum, G., & Wagner, R. 2001, In: Collisional processes in the solar system, ed. by: Mikhail Ya. Marov and Hans Rickman, Astrophysics and space science library, Volume 261, Dordrecht: Kluwer Academic Publishers, ISBN 0-7923-6946-7, 2001, p. 1 - 34 Size-frequency distributions of planetary impact craters and asteroids
Barnouin-Jha, O. S. & Cheng, Andrew 2000, American Astronomical Society, DPS meeting #32, #08.03 Asteroid depletion by collisions
Britt, D. T. & Consolmagno, G. J. 2000, American Astronomical Society, DPS meeting #32, #07.02 Asteroid Bulk Density
Veverka, J. F. & NEAR MSI-NIS Team 2000, American Astronomical Society, DPS meeting #32, #02.02 Global Properties and Geology of Eros from NEAR Imaging and Spectral Mapping
Hurford, T. A. & Greenberg, R. 2000, American Astronomical Society, DPS meeting #32, #60.04 Tidal Evolution by Elongated Primaries
Merline, W. J., Close, L. M., Dumas, C., Shelton, J. C., Menard, F., Chapman, C. R., & Slater, D. C. 2000, American Astronomical Society, DPS meeting #32, #13.06 Discovery of Companions to Asteroids 762 Pulcova and 90 Antiope by Direct Imaging
Chapman, C. R., Merline, W., Bierhaus, B., Thomas, P., Joseph, J., Veverka, J., Bell, J., Izenberg, N., Murchie, S., Prockter, L., Cheng, A., McFadden, L., & Robinson, M. 2000, American Astronomical Society, DPS meeting #32, #03.09 Craters, Boulders, and Impact History of Eros
Clark, B. E., Helfenstein, P., Bell, J. F., III, Veverka, J., Izenberg, N. I., Domingue, D., Wellnitz, D., & McFadden, L. 2000, American Astronomical Society, DPS meeting #32, #03.07 NEAR Infrared Spectrometer Photometry of Asteroid 433 Eros
Thomas, P. C., Joseph, J., Bell, J. F., III, Veverka, J. F., Clark, B., Robinson, M., Izenberg, N., Murchie, S., Prockter, L., Cheng, A., McFadden, L., & Chapman, C. 2000, American Astronomical Society, DPS meeting #32, #03.01 Eros: Shape, Slopes, and Slope Processes
Weidenschilling, S. J. & Davis, D. R. 2000, American Astronomical Society, DPS meeting #32, #52.01 Oligarchy to Chaos: The Mid-Stage of Planetary Accretion
Veverka, J., Robinson, M., Thomas, P., Murchie, S., Bell, J. F., Izenberg, N., Chapman, C., Harch, A., Bell, M., Carcich, B., Cheng, A., Clark, B., Domingue, D., Dunham, D., Farquhar, R., Gaffey, M. J., Hawkins, E., Joseph, J., Kirk, R., Li, H., Lucey, P., Malin, M., Martin, P., McFadden, L., Merline, W. J., Miller, J. K., Owen, W. M., Peterson, C., Prockter, L., Warren, J., Wellnitz, D., Williams, B. G., & Yeomans, D. K. 2000, Science, Volume 289, Issue 5487, pp. 2088-2097 (2000). NEAR at Eros: Imaging and Spectral Results
Zolensky, M. E., Pieters, C., Clark, B., & Papike, J. J. 2000, Meteoritics & Planetary Science, vol. 35, no. 1, pp. 9-29 (2000). Invited Review Small is beautiful: The analysis of nanogram-sized astromaterials
Flynn, G. J., Moore, L. B., & Klöck, W. 1999, Icarus, Volume 142, Issue Icarus, pp. 97-105. Density and Porosity of Stone Meteorites: Implications for the Density, Porosity, Cratering, and Collisional Disruption of Asteroids
Simmons, K. E. & Hendrix, A. R. 1999, American Astronomical Society, DPS meeting #31, #11.05 Ultraviolet Observations of Phobos, Deimos, Gaspra and Ida from Mariner 9 and Galileo
Hurford, T. A. & Greenberg, R. 1999, American Astronomical Society, DPS meeting #31, #12.06 Tidal Evolution by Elongated Primaries: Implications for the Ida/Dactyl System
Barnouin-Jha, O. S. & Cheng, A. F. 1999, American Astronomical Society, DPS meeting #31, #20.04 Predicting Crater Distributions on the Surface of Asteroid
O'Brien, D. P. & Greenberg, R. 1999, American Astronomical Society, DPS meeting #31, #12.05 Tiny Asteroids: Three Contradictory Lines of Evidence for their Numbers
Wilson, Lionel, Keil, Klaus, & Love, Stanley J. 1999, Meteoritics & Planetary Science, vol. 34, no. 3, pp. 479-483 (1999). The internal structures and densities of asteroids
Consolmagno, G. J., Pesonen, L. J., Britt, D. T., Flynn, G. J., Klock, W., Kuoppamki, K., Moore, L. B., & Terho, M. 1998, American Astronomical Society, DPS meeting #30, #07.P13; Bulletin of the American Astronomical Society, Vol. 30, p.1026 Densities and porosities of meteorites and IDP's: Implications for asteroids
Lien, D. J. 1998, American Astronomical Society, DPS meeting #30, #12.07; Bulletin of the American Astronomical Society, Vol. 30, p.1035 Asteroid debris trails: evidence for recent collisions in the asteroid belt
Fulchignoni, M., Barucci, M. A., Doressoundiram, A., & Dotto, E. 1998, American Astronomical Society, DPS meeting #30, #16.10; Bulletin of the American Astronomical Society, Vol. 30, p.1042 The new baseline for the Rosetta asteroid science
Monet, Alice K. B. & Monet, David G. 1998, American Astronomical Society, DDA meeting #30, #08.02; Bulletin of the American Astronomical Society, Vol. 30, p.1144 Searching for Duplicity Among Near-Earth Asteroids
Hughes, D. W. & Williams, I. P. 1998, Planetary and Space Science, Volume 46, Issue 8, p. 929-935. Sibling sandblasting and the smoothness of Gaspra and Ida
Giblin, Ian, Petit, Jean-Marc, & Farinella, Paolo 1998, Icarus, Volume 132, Issue 1, pp. 43-52. Impact Ejecta Rotational Bursting as a Mechanism for Producing Stable Ida-Dactyl Systems
Richardson, D. C., Lake, G., Quinn, T., & Stadel, J. 1997, American Astronomical Society Meeting, 191, #128.11 Direct Simulation of Planet Formation With a Million Planetesimals: A Progress Report
Lee, Pascal Clayton-Clyde 1997, Thesis (PHD). CORNELL UNIVERSITY , Source DAI-B 58/05, p. 2470, Nov 1997, 285 pages. Physical Properties and Processing of Asteroid Regoliths and Interiors
Petit, J.-M., Durda, Daniel D., Greenberg, Richard, Hurford, T. A., & Geissler, P. E. 1997, Icarus, Volume 130, Issue 1, pp. 177-197. The Long-Term Dynamics of Dactyl's Orbit
Richardson, D. C., Quinn, T., & Lake, G. 1997, American Astronomical Society, DPS meeting #29, #28.16; Bulletin of the American Astronomical Society, Vol. 29, p.1027 Direct Simulation of Planet Formation With a Million Planetesimals
Doressoundiram, A., Paolicchi, P., Verlicchi, A., & Cellino, A. 1997, Planet. Space Sci., vol. 45, p. 757-770 (1997). The formation of binary asteroids as outcomes of catastrophic collisions
Neukum, G., Wagner, R., Wolf, U., Head, J. W., III, Pappalardo, R., Chapman, C. R., Merline, W., & Belton, M. S. 1997, American Astronomical Society, DPS meeting #29, #12.08; Bulletin of the American Astronomical Society, Vol. 29, p.984 Bombardment History of the Galilean Satellites and Derived Ages
Veverka, J., Bell, J. F., III, Chapman, C., Malin, M., McFadden, L. A., Murchie, S., Robinson, M., Thomas, P. C., Yeomans, D. K., Harch, A., Williams, B. G., Clark, B., Farquhar, R. W., Cheng, A., & Dunham, D. W. 1997, American Astronomical Society, DPS meeting #29, #02.01; Bulletin of the American Astronomical Society, Vol. 29, p.958 NEAR's Flyby of Mainbelt Asteroid 253 Mathilde
Keil, K., Stoeffler, Dieter, Love, S. G., & Scott, E. R. D. 1997, Meteoritics, vol. 32, pages 349-363 Constraints on the role of impact heating and melting in asteroids
Wasilewski, P. J., Dickinson, T. L., Connerney, J. E., & Funaki, M. 1997, Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 503. Magnetic signatures of large meteorites
Neukum, Gerhard 1997, Near-Earth Objects, the United Nations International Conference: Proceedings of the international conference held April 24-26, 1995 in New York, New York, USA. Edited by John L. Remo, 1997. Annals of the New York Academy of Sciences, vol. 822, p. 318 Impact Record in the Solar System
Chapman, Clark R. 1997, Near-Earth Objects, the United Nations International Conference: Proceedings of the international conference held April 24-26, 1995 in New York, New York, USA. Edited by John L. Remo, 1997. Annals of the New York Academy of Sciences, vol. 822, p. 227 Gaspra and Ida: Implications of Spacecraft Reconnaissance for NEO Issues
Vedder, John D. 1996, Icarus, Volume 123, Issue 2, pp. 436-449. Asteroid Collisions: Estimating Their Probabilities and Velocity Distributions
Britt, D. T. & Consolmagno, G. J. 1996, American Astronomical Society, DPS meeting #28, #10.44; Bulletin of the American Astronomical Society, Vol. 28, p.1106 The Porosity of Asteroids and Meteorites: First Results from the Vatican Collection.
Hartmann, William K. & Ryan, Eileen V. 1996, American Astronomical Society, DPS meeting #28, #10.35; Bulletin of the American Astronomical Society, Vol. 28, p.1103 Possible Evidence of Yarkovsky Depletion of Debris from the Asteroid Belt and Effects on Asteroid Surfaces
Richardson, D. C. & Bottke, W. F. 1996, American Astronomical Society, DPS meeting #28, #10.33; Bulletin of the American Astronomical Society, Vol. 28, p.1103 Tidal Distortion and Disruption of Earth-Crossing Asteroids
Geissler, P. E., Durda, D. D., Plassmann, J., Hurford, T., & Greenberg, R. 1996, American Astronomical Society, DPS meeting #28, #10.32; Bulletin of the American Astronomical Society, Vol. 28, p.1102 Generation of Regolith on 243 Ida
Durda, D. D. & Geissler, P. E. 1996, American Astronomical Society, DPS meeting #28, #10.27; Bulletin of the American Astronomical Society, Vol. 28, p.1101 The Formation of Asteroidal Satellites in Large Cratering Collisions
Zeitler, W., Oberst, J., & Giese, B. 1996, Lunar and Planetary Science, volume 27, page 1489 A Close Look at the Locations of Ejecta Blocks on the Surface of the Asteroid Ida
Wasson, J. T., Chapman, C. R., Grogan, K., & Dermott, S. F. 1996, Lunar and Planetary Science, volume 27, page 1387 Possible Formation of the Vesta-Family Asteroids and the Main IRAS Dust Band by an Oblique Impact on Vesta
Stooke, P. J. 1996, Lunar and Planetary Science, volume 27, page 1283 Preliminary Mapping of Asteroid 4179 Toutatis
Giese, B., Oberst, J., Kirk, R. L., & Zeitler, W. 1996, Lunar and Planetary Science, volume 27, page 409 High Resolution Digital Terrain Models of Asteroid Ida: A Comparison Between Photogrammetry and the Shape-from-Shading Method
Gaffey, M. J. 1996, Lunar and Planetary Science, volume 27, page 391 Asteroid 6 Hebe: Spectral Evaluation of the Prime Large Mainbelt Ordinary Chondrite Parent Body Candidate with Implications from Space Weathering of Gaspra and the Ida-Dactyl System
Davis, Donald R., Chapman, Clark R., Durda, Daniel D., Farinella, Paolo, & Marzari, Francesco 1996, Icarus, Volume 120, Issue 1, pp. 220-230. The Formation and Collisional/Dynamical Evolution of the Ida/Dactyl System as Part of the Koronis Family
Veverka, J., Thomas, P. C., Helfenstein, P., Lee, P., Harch, A., Calvo, S., Chapman, C., Belton, M. J. S., Klaasen, K., Johnson, T. V., & Davies, M. 1996, Icarus, Volume 120, Issue 1, pp. 200-211. Dactyl: Galileo Observations of Ida's Satellite
Belton, Michael J. S., Mueller, Beatrice E. A., D'Amario, Louis A., Byrnes, Dennis V., Klaasen, Kenneth P., Synnott, Steven, Breneman, Herbert, Johnson, Torrence V., Thomas, Peter C., Veverka, Joseph, Harch, Ann P., Davies, Merton E., Merline, William J., Chapman, Clark R., Davis, Donald, Denk, Tilmann, Neukum, Gerhard, Petit, Jean-Marc, Greenberg, Richard, Storrs, Alex, & Zellner, Benjamin 1996, Icarus, Volume 120, Issue 1, pp. 185-199. The Discovery and Orbit of 1993 (243)1 Dactyl
Asphaug, Erik, Moore, Jeffrey M., Morrison, David, Benz, Willy, Nolan, Michael C., & Sullivan, Robert J. 1996, Icarus, Volume 120, Issue 1, pp. 158-184. Mechanical and Geological Effects of Impact Cratering on Ida
Geissler, Paul, Petit, Jean-Marc, Durda, Daniel D., Greenberg, Richard, Bottke, William, Nolan, Michael, & Moore, Jeffrey 1996, Icarus, Volume 120, Issue 1, pp. 140-157. Erosion and Ejecta Reaccretion on 243 Ida and Its Moon
Helfenstein, P., Veverka, J., Thomas, P. C., Simonelli, D. P., Klaasen, K., Johnson, T. V., Fanale, F., Granahan, J., McEwen, A. S., Belton, M., & Chapman, C. 1996, Icarus, Volume 120, Issue 1, pp. 48-65. Galileo Photometry of Asteroid 243 Ida
Davies, Merton E., Colvin, Tim R., Belton, Michael J. S., Veverka, Joseph, & Thomas, Peter C. 1996, Icarus, Volume 120, Issue 1, pp. 33-37. The Direction of the North Pole and the Control Network of Asteroid 243 Ida
Thomas, P. C., Belton, M. J. S., Carcich, B., Chapman, C. R., Davies, M. E., Sullivan, R., & Veverka, J. 1996, Icarus, Volume 120, Issue 1, pp. 20-32. The Shape of Ida
Belton, Michael J. S., Chapman, Clark R., Klaasen, Kenneth P., Harch, Ann P., Thomas, Peter C., Veverka, Joseph, McEwen, Alfred S., & Pappalardo, Robert T. 1996, Icarus, Volume 120, Issue 1, pp. 1-19. Galileo's Encounter with 243 Ida: an Overview of the Imaging Experiment
Geissler, P., Petit, J. M., & Greenberg, R. 1996, Completing the Inventory of the Solar System, Astronomical Society of the Pacific Conference Proceedings, volume 107, T.W. Rettig and J.M. Hahn, Eds., pp. 57-67. Ejecta Reaccretion on Rapidly Rotating Asteroids: Implications for 243 Ida and 433 Eros
Farinella, P., Davis, D. R., & Marzari, F. 1996, Completing the Inventory of the Solar System, Astronomical Society of the Pacific Conference Proceedings, volume 107, T.W. Rettig and J.M. Hahn, Eds., pp. 45-55. Asteroid Families, Old and Young
Romstedt, J. & Metzler, K. 1995, Meteoritics, vol. 30, no. 5, page 568 Preirradiated Grains in H-Chondritic Regolith Breccias: an In Situ Investigation
Lee, P. 1995, Meteoritics, vol. 30, no. 5, page 535 Electrostatic Levitation of Fines on Asteroids
Consolmagno, G. J. & Britt, D. T. 1995, Meteoritics, vol. 30, no. 5, page 500 Bulk Densities of Meteorites in the Vatican Collection and Implications for the S-Asteroid Controversy
Chapman, C. R. 1995, Meteoritics, vol. 30, no. 5, page 496 Galileo Observations of Gaspra, Ida, and Dactyl: Implications for Meteoritics
Gaffey, M. J. 1995, Meteoritics, vol. 30, no. 5, page 507 The S(IV)-type Asteroids as Ordinary Chondrite Parent Body Candidates: Implications for the Completeness of the Meteorite Sample of Asteroids
Wang, Z., Kivelson, M. G., Joy, S., Khurana, K. K., Polanskey, C., Southwood, D. J., & Walker, R. J. 1995, Advances in Space Research (ISSN 0273-1177), vol. 16, no. 4, p. (4)47-(4)57 Solar wind interaction with small bodies. 1: Whistler wing signatures near to Gaspra and Ida
Chen, Guangqing, Ahrens, Thomas J., & Hide, Raymond 1995, Icarus (ISSN 0019-1035), vol. 115, no. 1, p. 86-96 Hypervelocity impacts and magnetization of small bodies in the Solar System
Chapman, C. R., Veverka, J., Thomas, P. C., Klaasen, K., Belton, M. J. S., Harch, A., McEwen, A., Johnson, T. V., Helfenstein, P., Davies, M. E., Merline, W. J., & Denk, T. 1995, NATURE V.374, NO.6525/APR27, P. 783, 1995 Discovery and Physical Properties of Dactyl a Satellite of Asteroid 243 Ida
Gurnett, Donald A. 1995, Unknown The whistler-mode bow wave of an asteroid
Bottke, William Frederick, Jr. 1995, Thesis (PH.D.)--THE UNIVERSITY OF ARIZONA, 1995.Source: Dissertation Abstracts International, Volume: 56-05, Section: B, page: 2674. The Collisional and Dynamical Evolution of Asteroids
Slivan, Stephen Michael 1995, Thesis (PH.D.)--MASSACHUSETTS INSTITUTE OF TECHNOLOGY, 1995.Source: Dissertation Abstracts International, Volume: 56-04, Section: B, page: 2078. Spin-Axis Alignment of Koronis Family Asteroids
Kochemasov, G. G. 1995, Abstracts of the Lunar and Planetary Science Conference, volume 26, page 767, (1995) Ring Structures and Degassing Features on Asteroid Ida
Belton, M., Chapman, C., Thomas, P., Davies, M., Greenberg, R., Klaasen, K., Byrnes, D., D'Amario, L., Synnott, S., Merline, W., Petit, J.-M., Storrs, A., & Zellner, B. 1995, Nature, vol. 374, p. 785-788 (1995). The bulk density of asteroid 243 Ida from Dactyl's orbit
Belton, M. J. S., Chapman, C. R., Veverka, J., Klaasen, K. P., Harch, A., Greeley, R., Greenberg, R., Head, J. W., III, McEwen, A., Morrison, D., Thomas, P. C., Davies, M. E., Carr, M. H., Neukum, G., Fanale, F. P., Davis, D. R., Anger, C., Gierasch, P. J., Ingersoll, A. P., & Pilcher, C. B. 1994, SCIENCE V.265, NO. 5178/SEP9, P.1543, 1994 First Images of Asteroid 243 Ida
Scheeres, D. J. 1994, Icarus (ISSN 0019-1035), vol. 110, no. 2, p. 225-238 Dynamics about uniformly rotating triaxial ellipsoids: Applications to asteroids
Chapman, C. R., Klaasen, K., Belton, M. J. S., & Veverka, J. 1994, Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 455 Asteroid 243 IDA and its satellite
Chapman, C. R., Klaasen, K., Belton, M. J. S., & Veverka, J. 1994, Meteoritics, vol. 29, p. 455-455 (1994). Asteroid 243 IDA and its satellite
Monet, A. K. B., Stone, R. C., Monet, D. G., Dahn, C. C., Harris, H. C., Leggett, S. K., Pier, J. R., Vrba, F. J., & Walker, R. L. 1994, The Astronomical Journal (ISSN 0004-6256), vol. 107, no. 6, p. 2290-2294 Astrometry for the Galileo mission. 1: Asteroid encounters
Mason, J. W. 1994, Journal of the British Astronomical Association, vol.104, no.3, p.108-108 Ida's new moon
Dornheim, M. A. 1994, Aviation Week & Space Technology (ISSN 0005-2175), vol. 140, no. 13, p. 68 Ida moon tests asteroid theories
Bottke, W. F., Nolan, M. C., Greenberg, R., & Kolvoord, R. A. 1994, ICARUS, vol. 107, no. 2, p. 255-268 Velocity distributions among colliding asteroids
Mottola, S., Gonano-Beurer, M., Green, S. F., McBride, N., Brinjes, J. C., & di Martino, M. 1994, Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 1, p. 21-25 Colour variations of asteroid 243 Ida
Belton, M. J., Chapman, C. R., Veverka, J., Klaasen, K. P., Harch, A., Greeley, R., Greenberg, R., Head, J. W., Mc Ewen, A., Morrison, D., Thomas, P. C., Davies, M. E., Carr, M. H., Neukum, G., Fanale, F. P., Davis, D. R., Anger, C., Gierasch, P. J., Ingersoll, A. P., & Pilchier, C. B. 1994, Science, vol. 247, p. 1647-1652 (1994). First images of Asteroid 243 Ida
Nolan, Michael Craig 1994, Ph.D. Thesis Arizona Univ., Tucson, AZ. Delivery of meteorites from the asteroid belt
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