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30743 (1981 EQ17)
Classification: Main-belt Asteroid          SPK-ID: 2030743
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09976871457898205 3.4506e-08  
a 2.356626978951281 8.7232e-09 au
q 2.121509334519162 8.2475e-08 au
i 1.622922196334393 4.0264e-06 deg
node 224.9172760217132 0.0001267 deg
peri 296.5246967279935 0.00012822 deg
M 11.90915899524578 2.0616e-05 deg
tp 2459156.786730807485
(2020-Nov-03.28673081)
7.559e-05 TDB
period 1321.401193450162
3.62
7.3369e-06
2.009e-08
d
yr
n .2724380769325965 1.5127e-09 deg/d
Q 2.5917446233834 9.5935e-09 au
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      14609 days (40.00 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5221  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:37  

Additional Information
 Earth MOID = 1.12993 au 
 Jupiter MOID = 2.3857 au 
 T_jup = 3.547 
[ 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 15.98   n/a E2021B10  
diameter diameter 4.211 km 0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30743 (1981 EQ17)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EQ17 = 1999 FF42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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