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JPL Small-Body Database Browser
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216 Kleopatra
Classification: Main-belt Asteroid          SPK-ID: 2000216
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2509091006741018 2.0327e-08  
a 2.793772620839401 5.7978e-09 au
q 2.092789645056659 5.5998e-08 au
i 13.11298700551144 2.5905e-06 deg
node 215.3550172546718 1.3312e-05 deg
peri 180.0566243009477 1.4216e-05 deg
M 70.69628101320468 6.8375e-06 deg
tp 2458265.550695947152
(2018-May-27.05069595)
3.1745e-05 TDB
period 1705.630730936226
4.67
5.3094e-06
1.454e-08
d
yr
n .2110656154760971 6.5702e-10 deg/d
Q 3.494755596622143 7.2525e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3033  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      50790 days (139.06 yr)  
   first obs. used      1880-04-20  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40469  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:04:45  

Additional Information
 Earth MOID = 1.09911 au 
 Jupiter MOID = 1.93797 au 
 T_jup = 3.244 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.30   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 122 km 30 [Shepard, M. K. et al. (2018) Icarus 311, 197-209]  
extent extent 276x94x78 km 15% [Shepard, M. K. et al. (2018) Icarus 311, 197-209]  
rotation period rot_per 5.385 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 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 Bull. 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.]
[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.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[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 Bull. 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 Bull. 33, 85-88.]
[Garlitz, J. (2008) http://eoni.com/~garlitzj/Period.htm]
[Alton, K.B. (2009) Minor Planet Bull. 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.]
[Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
[Novak, R.; Alton, K.B. (2018) Minor Planet Bull. 45, 243.]
[Shepard, M.K.; Timerson, B.; Scheeres, D.J.; Benner, L.A.M.; et al. (2018) Icarus 311, 197-209.]
pole direction pole 69, 42   5 degrees [Shepard, M. K. et al. (2018) Icarus 311, 197-209]  
geometric albedo albedo 0.1164   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
B-V BV 0.713   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=22; phase (min.=6.01, mean=15.14, max.=25.13) deg.
U-B UB 0.238   0.009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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

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Alternate Designations
 A905 OA = A910 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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