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29121 (1981 QP2)
Classification: Main-belt Asteroid          SPK-ID: 2029121
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1818581201629023 5.8855e-08  
a 2.21637891647073 8.2368e-09 AU
q 1.813312413152673 1.3292e-07 AU
i 6.090334772989167 5.636e-06 deg
node 142.8306191356208 4.7018e-05 deg
peri 219.9601400541883 4.8728e-05 deg
M 10.6661632505439 1.1849e-05 deg
tp 2456964.791618343285
(2014-Nov-03.29161834)
3.9633e-05 JED
period 1205.214761339956
3.30
6.7185e-06
1.839e-08
d
yr
n .2987019505135771 1.6651e-09 deg/d
Q 2.619445419788787 9.7347e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      12121 days (33.19 yr)  
   first obs. used      1981-08-23  
   last obs. used      2014-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53833  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:54:28  

Additional Information
 Earth MOID = .815074 AU 
 T_jup = 3.624 
[ 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 15.4 mag n/a MPO263593  

29121 (1981 QP2)          Discovered 1981-Aug-23 by Debehogne, H. at La Silla (809)
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 QP2 = 1991 RC38 = 1991 SA5 = 2000 GL89 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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