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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189940513324542 4.9696e-08  
a 2.426835977532904 1.5503e-08 AU
q 2.138056932646907 1.2263e-07 AU
i 1.060946902204775 5.7873e-06 deg
node 273.8005744067189 0.00031605 deg
peri 164.8990856205395 0.00031734 deg
M 56.77425110481448 2.9532e-05 deg
tp 2456782.725022580656
(2014-May-05.22502258)
0.00011285 JED
period 1380.889934175026
3.78
1.3232e-05
3.623e-08
d
yr
n .2607014441126127 2.4982e-09 deg/d
Q 2.715615022418901 1.7348e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      13531 days (37.05 yr)  
   first obs. used      1977-02-13  
   last obs. used      2014-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58013  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:34:02  

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 15.1 mag n/a PDS3 (MPC 32870)  
rotation period rot_per 9.05 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]

9527 (1981 EH23)          Discovered 1981-Mar-03 by Bus, S. J. at Siding Spring (413)
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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