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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3103275220523455 4.3766e-08  
a 2.61984121129444 7.8458e-09 au
q 1.806832380022821 1.1481e-07 au
i 16.00356716267051 4.8735e-06 deg
node 290.5215408142239 1.5153e-05 deg
peri 54.84732935147429 1.6112e-05 deg
M 128.9136727745378 6.5412e-06 deg
tp 2458045.864885057048
(2017-Oct-19.36488506)
2.731e-05 TDB
period 1548.855424580689
4.24
6.9577e-06
1.905e-08
d
yr
n .2324296989161919 1.0441e-09 deg/d
Q 3.432850042566058 1.0281e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2377  
   data-arc span      31932 days (87.43 yr)  
   first obs. used      1932-07-04  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39462  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:56:22  

Additional Information
 Earth MOID = .844501 au 
 Jupiter MOID = 2.14783 au 
 T_jup = 3.283 
[ show covariance matrix ]

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-January); 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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