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9527 (1981 EH23)
Classification: Main-belt Asteroid          SPK-ID: 2009527
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189941083176772 4.3861e-08  
a 2.426835958918824 1.3576e-08 AU
q 2.138056777954003 1.0503e-07 AU
i 1.06093854681279 5.0634e-06 deg
node 273.800571335191 0.00031482 deg
peri 164.8991098088054 0.00031612 deg
M 56.77424215555956 2.9299e-05 deg
tp 2456782.725059413791
(2014-May-05.22505941)
0.00011182 JED
period 1380.889918287676
3.78
1.1587e-05
3.172e-08
d
yr
n .2607014471120229 2.1876e-09 deg/d
Q 2.715615139883644 1.5192e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      946  
   data-arc span      13975 days (38.26 yr)  
   first obs. used      1977-02-13  
   last obs. used      2015-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58486  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:05:46  

Additional Information
 Earth MOID = 1.15324 AU 
 T_jup = 3.500 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2 mag n/a MPO337338  
rotation period rot_per 9.05 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.]

9527 (1981 EH23)          Discovered 1981-Mar-03 by Bus, S. J. at Siding Spring
Reference: 19981110/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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