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1151 Ithaka (1929 RK)
Classification: Main-belt Asteroid          SPK-ID: 2001151
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2756517537713064 3.218e-08  
a 2.406583837335261 6.5735e-09 au
q 1.743204781976116 7.6696e-08 au
i 6.563780923879173 4.3623e-06 deg
node 225.4081305392809 2.6697e-05 deg
peri 122.4917581470801 2.7793e-05 deg
M 116.4868134969295 8.5645e-06 deg
tp 2458559.260702119001
(2019-Mar-16.76070212)
3.1548e-05 TDB
period 1363.64059131334
3.73
5.5871e-06
1.53e-08
d
yr
n .2639991815242749 1.0817e-09 deg/d
Q 3.069962892694406 8.3855e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2290  
   data-arc span      33099 days (90.62 yr)  
   first obs. used      1929-09-08  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:19:44  

Additional Information
 Earth MOID = .747985 au 
 Jupiter MOID = 2.41085 au 
 T_jup = 3.461 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456504.5 (2013-Jul-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2775913040427981 3.236e-08  
q 1.73711505715145 7.7221e-08 au
tp 2455833.490771268432
(2011-Sep-28.99077127)
2.7681e-05 TDB
node 225.469727621484 2.6741e-05 deg
peri 122.3886665749175 2.7806e-05 deg
i 6.560108295208352 4.3622e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2290  
   data-arc span      33099 days (90.62 yr)  
   first obs. used      1929-09-08  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:19:44  

Additional Information
 Jupiter MOID = 2.41085 au 
 T_jup = 3.461 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.047156864356132E-15 -2.494344735447807E-15 4.081026113785606E-13 -4.983040059367371E-15 9.76605432826713E-14 -1.380758637298865E-15
q -2.494344735447807E-15 5.963020773104207E-15 -9.658440373081607E-13 1.143419472645048E-14 -2.276713274502105E-13 3.431156949931627E-15
tp 4.081026113785606E-13 -9.658440373081607E-13 7.662354977562126E-10 -6.736043545841264E-12 2.164925184986304E-10 -1.721617651957854E-12
node -4.983040059367371E-15 1.143419472645048E-14 -6.736043545841264E-12 7.150848643736593E-10 -7.115656769038028E-10 -5.760046708762401E-12
peri 9.76605432826713E-14 -2.276713274502105E-13 2.164925184986304E-10 -7.115656769038028E-10 7.731901875814757E-10 5.279806393153578E-12
i -1.380758637298865E-15 3.431156949931627E-15 -1.721617651957854E-12 -5.760046708762401E-12 5.279806393153578E-12 1.902914292659856E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO435706  
diameter diameter 12.120 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.93115 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]
[Aymami, J.M. (2012) Minor Planet Bull. 39, 29.]
[Franco, L.; Ferrero, A.; Durkee, R.I. (2012) Minor Planet Bull. 39, 47-48.]
geometric albedo albedo 0.069   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1151 Ithaka (1929 RK)          Discovered 1929-Sep-08 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1929 RK = 1966 LA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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