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9324 (1989 CH4)
Classification: Main-belt Asteroid          SPK-ID: 2009324
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555316454111809 5.2292e-08  
a 2.414522520624979 1.5124e-08 au
q 2.038987860109824 1.2514e-07 au
i 2.044809794855878 4.8764e-06 deg
node 328.1515280165243 0.00014914 deg
peri 231.8722690243374 0.00014974 deg
M 69.60660328782714 1.6706e-05 deg
tp 2457335.532103450843
(2015-Nov-09.03210345)
6.267e-05 JED
period 1370.393586988581
3.75
1.2875e-05
3.525e-08
d
yr
n .2626982521066042 2.4682e-09 deg/d
Q 2.790057181140135 1.7476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1369  
   data-arc span      9609 days (26.31 yr)  
   first obs. used      1989-02-04  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49937  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:04:59  

Additional Information
 Earth MOID = 1.0368 au 
 Jupiter MOID = 2.17513 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 14.0 mag n/a MPO337336  
rotation period rot_per 6.5579 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

9324 (1989 CH4)          Discovered 1989-Feb-07 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19981005/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 CH4 = 1993 EV 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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