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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181858121448921 5.9297e-08  
a 2.216378916503814 8.3715e-09 AU
q 1.813312410329436 1.3374e-07 AU
i 6.090335135929387 5.6511e-06 deg
node 142.8306180789202 4.8748e-05 deg
peri 219.9601411952555 5.0421e-05 deg
M 10.66616311699129 1.2286e-05 deg
tp 2456964.791618789596
(2014-Nov-03.29161879)
4.1088e-05 JED
period 1205.214761366942
3.30
6.8283e-06
1.869e-08
d
yr
n .2987019505068889 1.6923e-09 deg/d
Q 2.619445422678193 9.8939e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      745  
   data-arc span      12063 days (33.03 yr)  
   first obs. used      1981-08-23  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54033  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:25:11  

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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