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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1720574635972618 1.307e-08  
a 3.148934458994482 1.2972e-08 au
q 2.607136782945876 4.4378e-08 au
i .8661768543157999 1.0625e-06 deg
node 185.8670446111569 6.76e-05 deg
peri 99.28156184669011 6.6385e-05 deg
M 303.4163730324324 5.8889e-06 deg
tp 2459521.298360622245
(2021-Nov-02.79836062)
3.3358e-05 TDB
period 2041.004014998946
5.59
1.2612e-05
3.453e-08
d
yr
n .1763837784514039 1.0899e-09 deg/d
Q 3.690732135043088 1.5204e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2747  
   data-arc span      24379 days (66.75 yr)  
   first obs. used      1954-06-07  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:31:52  

Additional Information
 Earth MOID = 1.58896 au 
 Jupiter MOID = 1.47294 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 12.63   n/a E2021B10  
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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