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1246 Chaka (1932 OA)
Classification: Main-belt Asteroid          SPK-ID: 2001246
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3107329562394461 4.3629e-08  
a 2.619034488353484 7.8093e-09 au
q 1.805214159294341 1.1444e-07 au
i 16.00463970320535 4.819e-06 deg
node 290.5259857707786 1.5144e-05 deg
peri 54.83377771711775 1.6057e-05 deg
M 221.920671953226 6.6758e-06 deg
tp 2459594.294837000919
(2022-Jan-14.79483700)
2.9963e-05 TDB
period 1548.140075304524
4.24
6.9243e-06
1.896e-08
d
yr
n .2325370977359313 1.0401e-09 deg/d
Q 3.432854817412627 1.0236e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2412  
   data-arc span      31959 days (87.50 yr)  
   first obs. used      1932-07-04  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:55:39  

Additional Information
 Earth MOID = .843757 au 
 Jupiter MOID = 2.15114 au 
 T_jup = 3.283 
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Orbital Elements at Epoch 2456553.5 (2013-Sep-18.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3077613868678646 4.3401e-08  
q 1.814111048558867 1.1371e-07 au
tp 2456491.935933795467
(2013-Jul-18.43593380)
2.6495e-05 TDB
node 290.7581989166111 1.5048e-05 deg
peri 54.08264101899707 1.6053e-05 deg
i 16.05014121462766 4.8247e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2412  
   data-arc span      31959 days (87.50 yr)  
   first obs. used      1932-07-04  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:55:39  

Additional Information
 Jupiter MOID = 2.15114 au 
 T_jup = 3.283 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.883604695001846E-15 -4.929423048703662E-15 -3.410917273860942E-13 6.767572514467023E-15 -9.598064283214957E-14 -1.563376078833285E-15
q -4.929423048703662E-15 1.292924420314966E-14 9.0850083519381E-13 -1.793284869720308E-14 2.539462696429346E-13 4.399755770804553E-15
tp -3.410917273860942E-13 9.0850083519381E-13 7.019831646024593E-10 -6.503274287412729E-12 1.685441165862854E-10 2.130055677380125E-12
node 6.767572514467023E-15 -1.793284869720308E-14 -6.503274287412729E-12 2.264448636283772E-10 -2.185705269541943E-10 2.480772819033024E-11
peri -9.598064283214957E-14 2.539462696429346E-13 1.685441165862854E-10 -2.185705269541943E-10 2.576957292078263E-10 -2.346405024496766E-11
i -1.563376078833285E-15 4.399755770804553E-15 2.130055677380125E-12 2.480772819033024E-11 -2.346405024496766E-11 2.327776599843932E-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 10.9   n/a MPO384758  
diameter diameter 17.634 km 0.498 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 25.462 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Garlitz, J. (2013) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Ferrero, A. (2014) Minor Planet Bull. 41, 184-185.]
geometric albedo albedo 0.195   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1246 Chaka (1932 OA)          Discovered 1932-Jul-23 by Jackson, C. at Johannesburg (UO)
Subsequently reported as discovered on July 4.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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