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114 Kassandra (A871 OA)
Classification: Main-belt Asteroid          SPK-ID: 2000114
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1367537297329914 3.2407e-08  
a 2.678060927574652 6.1824e-09 au
q 2.311826107276624 8.7268e-08 au
i 4.940905664768332 3.4367e-06 deg
node 164.0738341276027 3.7983e-05 deg
peri 352.7671799840969 3.9687e-05 deg
M 151.2944133740989 1.2362e-05 deg
tp 2458327.756519474137
(2018-Jul-28.25651947)
5.4247e-05 TDB
period 1600.770627203955
4.38
5.5431e-06
1.518e-08
d
yr
n .2248916827195957 7.7875e-10 deg/d
Q 3.04429574787268 7.0278e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2994  
   data-arc span      43157 days (118.16 yr)  
   first obs. used      1902-09-03  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:16  

Additional Information
 Earth MOID = 1.32133 au 
 Jupiter MOID = 1.9411 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454239.5 (2007-May-19.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374657710150631 3.2021e-08  
q 2.307991848306978 8.6059e-08 au
tp 2453529.393989447525
(2005-Jun-07.89398945)
5.1715e-05 TDB
node 164.3480022491911 3.8052e-05 deg
peri 352.933024615373 3.9764e-05 deg
i 4.936721184901976 3.4331e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2994  
   data-arc span      43157 days (118.16 yr)  
   first obs. used      1902-09-03  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:16  

Additional Information
 Jupiter MOID = 1.9411 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.025317676691531E-15 -2.750907237179491E-15 -2.871203618387375E-13 6.767491651457023E-15 -8.08631080865355E-14 -3.862173635019429E-16
q -2.750907237179491E-15 7.406196748843713E-15 7.645085346028793E-13 -1.869364044679144E-14 2.181669381200629E-13 1.168620926341722E-15
tp -2.871203618387375E-13 7.645085346028793E-13 2.674397773391E-9 -3.211213736916097E-12 6.089038688116929E-10 -7.962369495730767E-14
node 6.767491651457023E-15 -1.869364044679144E-14 -3.211213736916097E-12 1.44795148408526E-9 -1.442869668672469E-9 -2.307074839333903E-11
peri -8.08631080865355E-14 2.181669381200629E-13 6.089038688116929E-10 -1.442869668672469E-9 1.581179581680191E-9 2.299321992884183E-11
i -3.862173635019429E-16 1.168620926341722E-15 -7.962369495730767E-14 -2.307074839333903E-11 2.299321992884183E-11 1.178618804616123E-11

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 8.3   n/a MPO492749 IRAS observations used: 17
diameter diameter 94.178 km 0.954 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.7431 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Gil Hutton, R.; Blain, A. (1988) Minor Planet Bull. 15, 39-40.]
[Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.]
geometric albedo albedo 0.089   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.768   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.00, mean=3.22, max.=9.27) deg.
U-B UB 0.269   0.182 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.00, mean=3.22, max.=9.27) deg.
Tholen spectral type spec_T T   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Xk   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)

114 Kassandra (A871 OA)          Discovered 1871-Jul-23 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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