Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189940601855876 4.9174e-08  
a 2.426835974759655 1.532e-08 AU
q 2.138056908718555 1.2106e-07 AU
i 1.060947295816532 5.7527e-06 deg
node 273.8005644644803 0.00031558 deg
peri 164.8990986804654 0.00031687 deg
M 56.77424974820318 2.9524e-05 deg
tp 2456782.725028157645
(2014-May-05.22502816)
0.00011281 JED
period 1380.889931808023
3.78
1.3076e-05
3.58e-08
d
yr
n .2607014445594847 2.4686e-09 deg/d
Q 2.715615040800754 1.7143e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      831  
   data-arc span      13852 days (37.92 yr)  
   first obs. used      1977-02-13  
   last obs. used      2015-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59081  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:26:28  

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-Feb); 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 (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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-05 08:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin