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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189941033318668 4.4346e-08  
a 2.426835960450571 1.3728e-08 AU
q 2.138056791403225 1.0651e-07 AU
i 1.060938956050987 5.1847e-06 deg
node 273.8005740414637 0.00031541 deg
peri 164.8991049017216 0.0003167 deg
M 56.77424331045464 2.9333e-05 deg
tp 2456782.725054777658
(2014-May-05.22505478)
0.00011197 JED
period 1380.889919595041
3.78
1.1717e-05
3.208e-08
d
yr
n .2607014468652022 2.2121e-09 deg/d
Q 2.715615129497916 1.5362e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      13922 days (38.12 yr)  
   first obs. used      1977-02-13  
   last obs. used      2015-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58177  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:35:20  

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 LCDB (Rev. 2015-May); Warner et al., 2009 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
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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