(216) Kleopatra, S/2008 (216) 1, and S/2008 (216) 1

(216) Kleopatra, S/2008 (216) 1, and S/2008 (216) 1
compiled by Wm. Robert Johnston
last updated 8 July 2009

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:	2.795846148 AU
orbital period P:	4.67 y (=1707.529952 d)
eccentricity e:	0.24817623
perihelion distance q:	2.10198359 AU
aphelion distance Q:	3.489708702 AU
inclination i:	13.096162°
argument of perihelion omega:	179.93664°
ascending node OMEGA:	215.51370°
mean anomaly M:	349.421575°
perihelion passage TP:	2009-01-19.17494
Epoch:	30 NOV 2008
data arc:	1880-2008 (1821 obs.)

orbital data, S/2008 (216) 1:

semimajor axis a: 775 km [VO]
semimajor axis/primary radius a/Rp: (14)
orbital period P: 4.2 d [VO]
eccentricity e: ?
inclination i: ?

orbital data, S/2008 (216) 2:

semimajor axis a: ~380 km separation [I8980]
semimajor axis/primary radius a/Rp: (~7?)
orbital period P: (~1.4 d?)
eccentricity e: ?
inclination i: ?

other data, primary:

diameter:	217 x 94 x 81 km (± 15 km) [O00a]
mean diameter d:	(108 km) [O00a]
absolute magnitude H:	7.30 [JPL]
rotation period:	5.3853 ± 0.0003 h [D92a]
amplitude delta M:	?
color index U-B:	0.238 ± 0.009 [JPL]
color index B-V:	0.713 ± 0.021 [JPL]
color index V-R:	?
color index R-I:	?
slope parameter G:	0.29 [JPL]
geometric albedo:	0.116 ± 0.004 [IR] 0.077 ± 0.005 (B) [S05c] 0.059 ± 0.003 (V) [S05c]
mass:	?
density:	3.5 g/cm³ [O00a]
type:	M, Xe [JPL]

other data, S/2008 (216) 1:

diameter: 5 km [I8980]
diameter ratio Ds/Dp: (0.03)
component magnitude difference: (7.3)
rotation period: ?

other data, S/2008 (216) 2:

diameter: 3 km [I8980]
diameter ratio Ds/Dp: (0.02)
component magnitude difference: (8.4)
rotation period: ?

--(216) Kleopatra--discovery and notes:

Primary discovered 10 April 1880 by J. Palisa at Pola. Alternate designations A905 OA, A910 RA. In November 1999 Kleopatra was imaged by radar from Arecibo.

S/2008 (216) 1 and S/2008 (216) 2 discovered by F. Marchis, P. Descamps, J. Berthier, and J. P. Emery from Keck II adaptive optics telescope observations acquired 19 September 2008; reported 24 September 2008.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Shepard, Michael K., Clark, Beth Ellen, Nolan, Michael C., Howell, Ellen S., Magri, Christopher, Giorgini, Jon D., Benner, Lance A. M., Ostro, Steven J., Harris, Alan W., Warner, Brian, Pray, Donald, Pravec, Petr, Fauerbach, Michael, Bennett, Thomas, Klotz, Alain, Behrend, Raoul, Correia, Horacio, Coloma, Josep, Casulli, Silvano, & Rivkin, Andrew 2008, Icarus A radar survey of M- and X-class asteroids
Boice, Daniel 2008, 37th COSPAR Scientific Assembly. Held 13-20 July 2008, in Montréal, Canada., p.342 A versatile model of cometary nuclei and asteroids for spacecraft encounters
Warner, Brian D. 2006, Minor Planet Bulletin Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006
Lim, Lucy F. & Emery, J. P. 2006, Bulletin of the American Astronomical Society A Spitzer IRS Survey Of Hydrated and Non-Hydrated M Asteroids: Preliminary 5-13 Micron Results
Shepard, Michael K., Clark, B. E., Benner, L. A., Giorgini, J. D., Magri, C., Nolan, M. C., & Ostro, S. J. 2006, Bulletin of the American Astronomical Society More Results from a Long-Term Radar Survey of M-Class Asteroids.
Kadish, J. 2005, Bulletin of the American Astronomical Society Plastic Deformation of Accreted Planetesimals
Shepard, M. K., Clark, B. E., Benner, L. A. M., Giorgini, J. D., Howell, E. S., Magri, C., Nolan, M. C., & Ostro, S. J. 2005, Bulletin of the American Astronomical Society A Long-Term Radar Survey of M-Class Asteroids
Hardersen, Paul S., Gaffey, Michael J., & Abell, Paul A. 2005, Icarus Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids
Storrs, A. D., Dunne, C., Conan, J.-M., Mugnier, L., Weiss, B. P., & Zellner, B. 2005, Icarus A closer look at main belt asteroids 1: WF/PC images
Ostro, S. J., Hudson, R. S., Nolan, M. C., Margot, J.-L., Scheeres, D. J., Campbell, D. B., Magri, C., Giorgini, J. D., & Yeomans, D. K. 2004, NASA Planetary Data System, EAR-A-5-DDR-RADARSHAPE-MODELS-V2.0:RSHAPES-216KLEOPATRA-200405 Asteroid Radar Shape Models, 216 Kleopatra
Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System, EAR-A-I0028-4-SBN0001/SMASSII-V1.0:216KLEOPA01 216 Kleopatra CCD Spectrum
Takahashi, S., Shinokawa, K., Yoshida, F., Mukai, T., Ip, W. H., & Kawabata, K. 2004, Earth, Planets, and Space Photometric and polarimetric observations and model simulations of (216) Kleopatra
Asphaug, E., Agnor, C., Williams, Q., Petit, J., & Rivkin, A. 2003, AGU Fall Meeting Abstracts TIDAL DISRUPTION OF PRIMORDIAL PLANETARY BODIES
Storrs, A. D., Bank, S., Gerhardt, H., & Makhoul, K. 2003, Bulletin of the American Astronomical Society Reconstructing HST Images of Asteroids
Hardersen, Paul Scott 2003, Ph.D. Thesis Near-IR reflectance spectroscopy of asteroids and study of the thermal history of the main asteroid belt
Asphaug, E., Agnor, C., Williams, Q., Petit, J.-M., & Rivkin, A. S. 2003, Bulletin of the American Astronomical Society Tidal Disruption of Primordial Asteroids: A New Pathway for Meteorite Petrogenesis
Hardersen, P. S., Gaffey, M. J., & Abell, P. A. 2003, Bulletin of the American Astronomical Society M-Asteroids II: The search for weak spectral features on 16 Psyche, 125 Liberatrix and 136 Austria.
Hestroffer, D., Berthier, J., Descamps, P., Tanga, P., Cellino, A., Lattanzi, M., Di Martino, M., & Zappalà, V. 2002, Astronomy and Astrophysics Asteroid (216) Kleopatra. Tests of the radar-derived shape model
Tanga, Paolo, Hestroffer, D., Cellino, A., Lattanzi, M., di Martino, M., & Zappalá, V. 2002, Asteroids, Comets, and Meteors: ACM 2002 Shape and size measurements of asteroids by the HST Fine Guidance Sensors
Hestroffer, D., Descamps, P., Kaasalainen, M., Tanga, P., Torppa, J., Berthier, J., Cellino, A., Lattanzi, M., di Martino, M., Piironen, J., & Zappalá, V. 2002, Asteroids, Comets, and Meteors: ACM 2002 Comparison of topographic models for asteroids to the HST/FGS data
Washabaugh, P. D. & Scheeres, D. J. 2002, Icarus Energy and Stress Distributions in Ellipsoids
Hestroffer, D., Marchis, F., Fusco, T., & Berthier, J. 2002, Astronomy and Astrophysics Adaptive optics observations of asteroid (216) Kleopatra
Hestroffer, D., Tanga, P., Berthier, J., Cellino, A., Lattanti, M., di Martino, M., & Zappalá, V. 2002, Memorie della Societa Astronomica Italiana HST/FGS interferometric observations of asteroids
Shinokawa, K., Takahashi, S., Ogawa, K., Yoshida, F., Minato, T., Mukai, T., & Kawabata, K. 2002, Memorie della Societa Astronomica Italiana Observations of photopolarimetric variation with the rotation of asteroids, 3 Juno and 216 Kleopatra
Hestroffer, D., Berthier, J., Descamps, P., Tanga, P., Cellino, A., Lattanzi, M., Di Martino, M., & Zappalà, V. 2002, Astronomy and Astrophysics Asteroid (216) Kleopatra. Tests of the radar-derived shape model
Hardersen, P. S., Gaffey, M. J., & Abell, P. A. 2002, Lunar and Planetary Institute Conference Abstracts M-Asteroids: Searching for Weak Silicate Features on Potentially Differentiated Objects
Kaasalainen, M., Torppa, J., & Piironen, J. 2002, Astronomy and Astrophysics Binary structures among large asteroids
Boice, D. 2002, 34th COSPAR Scientific Assembly A Versatile Model of Small Solar System Objects
Tanga, P., Hestroffer, D., Berthier, J., Cellino, A., Lattanzi, M. G., di Martino, M., & Zappalá, V. 2001, Icarus NOTE: HST/FGS Observations of the Asteroid (216) Kleopatra
Fauvaud, S., Sareyan, J.-P., Boussuge, J., & Bernhard, P. 2001, Minor Planet Bulletin Photometric Observations of the Minor Planet 216 Kleopatra
Storrs, A. D., Dunne, C., Conan, J.-M., & Mugnier, L. 2000, Bulletin of the American Astronomical Society HST Imaging Observations of Asteroid 216 Kleopatra
Boice, D. C., Hasagawa, H., Muroi, K., Tanabe, R., & Watanabe, J.-I. 2000, Bulletin of the American Astronomical Society Modeling Cometary Nuclei and Asteroids
Marchis, F. 2000, Ph.D. Thesis High resolution imaging of the solar system bodies by means of Adaptive Optics. A study of the volcanic activity of Io.
Asphaug, E., Bottke, W. F., Jr., Morbidelli, A., & Petit, J.-M. 2000, Bulletin of the American Astronomical Society Tides Versus Collisions in the Primordial Main Belt
Hasagawa, H., Boice, D. C., Muroi, K., Tanabe, R., & Watanabe, J.-I. 2000, Bulletin of the American Astronomical Society A Physical Model for Small Bodies in the Solar System
Leinhardt, Z. M., Richardson, D. C., & Quinn, T. 2000, Bulletin of the American Astronomical Society Size distribution dependence in rubble-pile collisions and implications for (216) Kleopatra
Merline, W. J., Close, L. M., Dumas, C., Shelton, J. C., Menard, F., Chapman, C. R., & Slater, D. C. 2000, Bulletin of the American Astronomical Society Discovery of Companions to Asteroids 762 Pulcova and 90 Antiope by Direct Imaging
Hammergren, M., Macintosh, B., Gibbard, S., & Gavel, D. 2000, Bulletin of the American Astronomical Society Speckle interferometric images of (216) Kleopatra from the Keck I Telescope
Foglia, S. 2000, Minor Planet Bulletin CCD Photometry of 216 Kleopatra
Ostro, Steven J., Hudson, R. Scott, Nolan, Michael C., Margot, Jean-Luc, Scheeres, Daniel J., Campbell, Donald B., Magri, Christopher, Giorgini, Jon D., & Yeomans, Donald K. 2000, Science Radar Observations of Asteroid 216 Kleopatra
Ostro, S. J., Hudson, R. S., Nolan, M. C., Margot, J.-L., Scheeres, D. J., Campbell, D. B., Magri, C., Giorgini, J. D., & Yeomans, D. K. 2000, NASA Planetary Data System, EAR-A-5-DDR-RADARSHAPE-MODELS-V1.1:RSHAPES-216KLEOPATRA-200006 Asteroid radar shape models, 216 Kleopatra
Neese, C. 2000, NASA Planetary Data System, EAR-A-5-DDR-RADARSHAPE-MODELS-V1.1 Small body radar shape models V1.1
Marchis, F., Hestroffer, D., Cellino, A., Tanga, P., & Zappala, V. 1999, International Astronomical Union Circular (216) Kleopatra
Ostro, S. J., Hudson, R. S., Nolan, M. C., Magri, C., Campbell, D. B., Giorgini, J. D., & Yeomans, D. K. 1999, AAS/Division for Planetary Sciences Meeting Abstracts Plans for Radar Imaging of Asteroid 216 Kleopatra
Ostro, S. J., Hudson, R. S., Nolan, M. C., Magri, C., Campbell, D. B., Giorgini, J. D., & Yeomans, D. K. 1999, Bulletin of the American Astronomical Society Plans for radar imaging of asteroid 216 Kleopatra.
Magri, Christopher, Ostro, Steven J., Rosema, Keith D., Thomas, Michael L., Mitchell, David L., Campbell, Donald B., Chandler, John F., Shapiro, Irwin I., Giorgini, Jon D., & Yeomans, Donald K. 1999, Icarus Mainbelt Asteroids: Results of Arecibo and Goldstone Radar Observations of 37 Objects during 1980-1995
Magri, C., Ostro, S. J., Rosema, K. D., Thomas, M. L., Mitchell, D. L., Campbell, D. B., Chandler, J. F., Shapiro, I., Giorgini, J. D., & Yeomans, D. K. 1998, Bulletin of the American Astronomical Society Mainbelt Asteroids: Results of Arecibo and Goldstone Radar Observations of 37 Objects During 1980-1995
Redman, Russell O., Feldman, P. A., & Matthews, H. E. 1998, Astronomical Journal High-Quality Photometry of Asteroids at Millimeter and Submillimeter Wavelengths
Mitchell, D. L., Ostro, S. J., Rosema, K. D., Hudson, R. S., Campbell, D. B., Chandler, J. F., & Shapiro, I. I. 1995, Icarus Radar observations of asteroids 7 Iris, 9 Metis, 12 Victoria, 216 Kleopatra, and 654 Zelinda.
Dotto, E., Barucci, M. A., Fulchignoni, M., di Martino, M., Rotundi, A., Burchi, R., & di Paolantonio, A. 1992, Astronomy and Astrophysics Supplement Series M-type asteroids - Rotational properties of 16 objects
Weiss, Benjamin 1992, HST Proposal Investigation of the Dynamics of Binary Asteroids
Dunham, D. W., Osborn, W., Williams, G., Brisbin, J., Gada, A., Hirose, T., Maley, P., Povenmire, H., Stamm, J., Thrush, J., Aikman, C., Fletcher, M., Soma, M., & Sichao, W. 1991, LPI Contributions The Sizes and Shapes of (4) Vesta, (216) Kleopatra, and (381) Myrrha From Occultations Observed During January 1991
Manly, P. L. 1991, Astronomy Stand in the Shadow of an Asteroid
Hutton, R. G. 1990, Minor Planet Bulletin V+B Photoelectric Photometry of Asteroids 65 Cybele and 216 Kleopatra
Ostro, Steven J. 1988, NASA Reports of Planetary Astronomy Radar investigation of asteroids and planetary satellites
Frank, P. & Frevert, F. 1988, Sterne und Weltraum Rotationslichtwechsel des Kleinplaneten (216) Kleopatra.
Lupishko, D. F. & Velichko, F. P. 1987, Kinematika i Fizika Nebesnykh Tel The sense of rotation of asteroids 21, 63, 216, and 349
Koshkin, N. I. 1986, Kinematika i Fizika Nebesnykh Tel Determination of the rotation parameters of asteroids with large amplitudes of light variation
Magnusson, P. 1986, Icarus Distribution of spin axes and senses of rotation for 20 large asteroids
Gradie, J. 1986, Lunar and Planetary Institute Conference Abstracts A Search for Circum-Asteroidal Material Using a Stellar Coronagraph
Berdnikov, L. N., Grankin, K. N., & Rakitin, I. A. 1985, Byulleten' Instituta Teoreticheskoj Astronomii (Leningrad) Observations of minor planets in Saratov.
Leone, G., Paolicchi, P., Farinella, P., & Zappala, V. 1984, Astronomy and Astrophysics Equilibrium models of binary asteroids
Carlsson, M. & Lagerkvist, C.-I. 1983, Astronomy and Astrophysics Supplement Series Physical studies of asteroids. XI - Photoelectric observations of the asteroids 2, 161, 216 and 276
Zappala, V., di Martino, M., Scaltriti, F., Djurasevic, G., & Knezevic, Z. 1983, Icarus Photoelectric analysis of asteroid 216 Kleopatra Implications for its shape
Magnusson, P. 1983, Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20-22, 1983 (A85-26851 11-89). Uppsala, Sweden, Astronomiska Observatoriet, 1983, p. 77-85. Determination of spin axis orientation for asteroids 44 Nysa, 216 Kleopatra and 624 Hektor
Magnusson, P. 1983, ASTEROIDS COMETS METEORS: UPPSALA:1983JUN20-22 P. 75, 1983 Determination of Spin Axis Orientation for Asteroids 44 NYSA 216 Kleopatra and 624 Hektor
Pilcher, Frederick & Tholen, David J. 1982, Minor Planet Bulletin 216 Kleopatra: Visual Lightcurves of a Large Amplitude Asteroid
Kennedy, H. D. & Tholen, D. J. 1982, Proceedings of the Astronomical Society of Australia The brightness variations of asteroid 216 Kleopatra
Knezevic, Z., Djurasevic, G., & Pavlovski, K. 1982, Hvar Observatory Bulletin A review of photoelectric photometry of asteroids made at Hvar Observatory
Ostro, S. J. 1981, NASA STI/Recon Technical Report N Radar investigation of asteroids
Klemola, A. R. 1981, Astronomical Journal Astrometric observations of planets, minor planets, and satellites - 1976-1980
Grossman, Martin, Hoffman, Martin, & Duerbeck, Hilman W. 1981, Minor Planet Bulletin Photometric Measurements of 216 Kleopatra
Kerr, R. A. 1981, Science Satellites of asteroids coming into vogue
Boninsegna, R. 1981, Ciel et Terre Les variations d'éclat de l'astéroïde 216 Kleopatra
Tholen, D. J. 1980, NASA STI/Recon Technical Report A The unusual asteroid 216 Kleopatra
Tholen, D. J. 1980, International Astronomical Union Circular (216) Kleopatra
1980, Yamamoto Circular (216) Kleopatra.
Tholen, David J. 1980, Sky and Telescope The Unusual Asteroid 216 Kleopatra
Scaltriti, F. & Zappala, V. 1978, Icarus Photoelectric photometry of asteroids 37, 80, 97, 216, 270, 313, and 471
Knopf, O. 1917, Astronomische Nachrichten Beobachtungen der Planeten 6 Hebe und 216 Kleopatra
Abetti, Antonio 1906, Astronomische Nachrichten Pianeta 1905 QR = (216) Kleopatra
1905, Astronomische Nachrichten Beobachtungen des Planeten (216) Kleopatra [1905 QR]

© 2008, 2009 by Wm. Robert Johnston.
Last modified 8 July 2009.
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