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216 Kleopatra
Classification: Main-belt Asteroid          SPK-ID: 2000216
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2495816423273642 1.8627e-08  
a 2.796299716778488 4.8346e-09 AU
q 2.09839464102537 5.117e-08 AU
i 13.09911938848609 2.5122e-06 deg
node 215.3998668123963 1.2207e-05 deg
peri 180.3016150318714 1.2912e-05 deg
M 92.72228399978866 5.0701e-06 deg
tp 2456560.598315413256
(2013-Sep-25.09831541)
2.3671e-05 JED
period 1707.945486454895
4.68
4.4294e-06
1.213e-08
d
yr
n .2107795610896432 5.4664e-10 deg/d
Q 3.494204792531606 6.0413e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2312  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      48923 days (133.94 yr)  
   first obs. used      1880-04-20  
   last obs. used      2014-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45963  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:09:57  

Additional Information
 Earth MOID = 1.1051 AU 
 T_jup = 3.244 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.30 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
magnitude slope G 0.29   n/a PDS3 (MPC 17258) Fit
diameter diameter 124 km n/a Yeomans E-mail 2001-Apr-04 Effective diameter for axes: 217 x 94 km
extent extent 217x94x81 km 25% Ostro, S.J. et al. (2000) Science v.288, pp.836-839  
rotation period rot_per 5.385 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Scaltriti, F.; Zappala, V. (1978) Icarus 34, 428-435.]
[Kennedy, H.D.; Tholen, D.J. (1982) Proc. Astron. Soc. Aust. 4, 414-417.]
[Pilcher, F.; Tholen, D.J. (1982) Minor Planet Bul. 9, 13-14.]
[Magnusson, P. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 77-85.]
[Zappala, V.; Di Martino, M.; Scaltriti, F.; Djurasevic, G.; Knezevic, Z. (1983) Icarus 53, 458-464.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Lupishko, D.F.; Velichko, F.P. (1987) Kin. Fiz. Neb. Tel 3(1), 57-65; Kinematics and Physics of Celestial Bodies 3(1), 63-71.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Fauvaud, S.; Sareyan, J.; Boussuge, J.; Bernhard, P. (2001) Minor Planet Bul. 28, 44-45.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2006) Minor Planet Bul. 33, 85-88.]
[Alton, K.B. (2009) Minor Planet Bul. 36, 69.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kaasalainen, M.; Viikinkoski, M. (2012) Astron. Astrophys. 543, A97.]
geometric albedo albedo 0.1164   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
B-V BV .713 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=22; phase (min.=6.01, mean=15.14, max.=25.13) deg.
U-B UB .238 mag .009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=15; phase (min.=8.51, mean=15.63, max.=25.13) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xe   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

216 Kleopatra          Discovered 1880-Apr-10 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A905 OA = A910 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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