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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1721174093275439 1.3074e-08  
a 3.14881075297191 1.1998e-08 au
q 2.606845603707672 4.4224e-08 au
i .8662288662189738 1.0566e-06 deg
node 185.8689908135363 6.7541e-05 deg
peri 99.32209167953441 6.6317e-05 deg
M 337.9597009765427 5.8388e-06 deg
tp 2459521.449133353410
(2021-Nov-02.94913335)
3.3069e-05 TDB
period 2040.883744787401
5.59
1.1665e-05
3.194e-08
d
yr
n .1763941728280566 1.0082e-09 deg/d
Q 3.690775902236148 1.4063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2932  
   data-arc span      24495 days (67.06 yr)  
   first obs. used      1954-06-07  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:07:41  

Additional Information
 Earth MOID = 1.5903 au 
 Jupiter MOID = 1.47202 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 12.65   n/a MPO614063  
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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