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91281 (1999 EQ11)
Classification: Main-belt Asteroid          SPK-ID: 2091281
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1317036835545088 7.4398e-08  
a 2.30286009775466 1.2512e-08 au
q 1.999564940169675 1.7223e-07 au
i 24.34555851550197 5.5347e-06 deg
node 47.41373934598053 1.4928e-05 deg
peri 140.20368307 2.5199e-05 deg
M .3132388719831817 2.0139e-05 deg
tp 2458999.389361025827
(2020-May-29.88936103)
7.1407e-05 TDB
period 1276.438100325155
3.49
1.0403e-05
2.848e-08
d
yr
n .2820348279390085 2.2985e-09 deg/d
Q 2.606155255339646 1.416e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1096  
   data-arc span      7777 days (21.29 yr)  
   first obs. used      1999-01-13  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45688  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:39:02  

Additional Information
 Earth MOID = 1.02668 au 
 Jupiter MOID = 2.41751 au 
 T_jup = 3.461 
[ 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 15.0   n/a MPO459427  
diameter diameter 5.614 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91281 (1999 EQ11)          Discovered 1999-Mar-12 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 EQ11 = 2001 TS122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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