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2981 Chagall (1981 EE20)
Classification: Main-belt Asteroid          SPK-ID: 2002981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1720336146465778 2.9226e-08  
a 3.149666652705616 1.4344e-08 au
q 2.607818113508882 9.6052e-08 au
i .8660188246655148 3.9166e-06 deg
node 185.8668393677046 0.00021566 deg
peri 99.20275529329643 0.00021595 deg
M 268.2206845704702 1.1987e-05 deg
tp 2459521.020248730984
(2021-Nov-02.52024873)
6.8928e-05 TDB
period 2041.715921132954
5.59
1.3947e-05
3.818e-08
d
yr
n .1763222769013991 1.2045e-09 deg/d
Q 3.69151519190235 1.6812e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2656  
   data-arc span      24116 days (66.03 yr)  
   first obs. used      1954-06-07  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48539  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:52:22  

Additional Information
 Earth MOID = 1.59156 au 
 Jupiter MOID = 1.47257 au 
 T_jup = 3.185 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.6   n/a MPO384778  
diameter diameter 15.489 km 0.617 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.5 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.117   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2981 Chagall (1981 EE20)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 EE20 = 1954 LF = 1977 RN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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