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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3108958436918683 4.2076e-08  
a 2.618737779285532 7.6051e-09 au
q 1.804583087986787 1.1067e-07 au
i 16.00466564392109 4.1824e-06 deg
node 290.5244440558747 1.5089e-05 deg
peri 54.84767078850508 1.5684e-05 deg
M 268.4298269267739 6.5586e-06 deg
tp 2459594.220457934522
(2022-Jan-14.72045793)
2.9136e-05 TDB
period 1547.877000768393
4.24
6.7428e-06
1.846e-08
d
yr
n .2325766193446183 1.0131e-09 deg/d
Q 3.432892470584277 9.9695e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2769  
   data-arc span      32339 days (88.54 yr)  
   first obs. used      1932-07-04  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3731  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:04:22  

Additional Information
 Earth MOID = .841425 au 
 Jupiter MOID = 2.15159 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 10.95   n/a E2021B10  
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. 2020-October); 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.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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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