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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .27565175424521 3.216e-08  
a 2.406583837201916 6.5721e-09 au
q 1.743204780739039 7.6645e-08 au
i 6.563781024744324 4.3504e-06 deg
node 225.4081305859694 2.6695e-05 deg
peri 122.4917585692479 2.7787e-05 deg
M 116.4868131971998 8.559e-06 deg
tp 2458559.260703291017
(2019-Mar-16.76070329)
3.1525e-05 TDB
period 1363.640591200004
3.73
5.5859e-06
1.529e-08
d
yr
n .2639991815462166 1.0814e-09 deg/d
Q 3.069962893664793 8.3837e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2312  
   data-arc span      33291 days (91.15 yr)  
   first obs. used      1929-09-08  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:56  

Additional Information
 Earth MOID = .747985 au 
 Jupiter MOID = 2.41085 au 
 T_jup = 3.461 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456519.5 (2013-Aug-15.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .277591088951538 3.2339e-08  
q 1.737115733441084 7.7164e-08 au
tp 2457195.447818410176
(2015-Jun-21.94781841)
2.8837e-05 TDB
node 225.4697344020338 2.6738e-05 deg
peri 122.3869647111177 2.78e-05 deg
i 6.560107875279964 4.3503e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2312  
   data-arc span      33291 days (91.15 yr)  
   first obs. used      1929-09-08  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:56  

Additional Information
 Jupiter MOID = 2.41085 au 
 T_jup = 3.461 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.045779318678619E-15 -2.490887668608388E-15 4.346105219969083E-13 -4.989450079168832E-15 9.717031431286519E-14 -1.370950010049342E-15
q -2.490887668608388E-15 5.954354010009058E-15 -1.003514140974129E-12 1.145324901217331E-14 -2.264183301431587E-13 3.407619905886373E-15
tp 4.346105219969083E-13 -1.003514140974129E-12 8.315801469246221E-10 -7.381460322932047E-12 2.243421475283449E-10 -1.577735440472392E-12
node -4.989450079168832E-15 1.145324901217331E-14 -7.381460322932047E-12 7.149398927505495E-10 -7.114229310395398E-10 -5.740491332187239E-12
peri 9.717031431286519E-14 -2.264183301431587E-13 2.243421475283449E-10 -7.114229310395398E-10 7.72826960505043E-10 5.264303066267035E-12
i -1.370950010049342E-15 3.407619905886373E-15 -1.577735440472392E-12 -5.740491332187239E-12 5.264303066267035E-12 1.892512212362328E-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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