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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819554733903582 6.6412e-08  
a 2.2166345763445 9.6893e-09 AU
q 1.8133057826723 1.4756e-07 AU
i 6.090142010829795 5.7138e-06 deg
node 142.8304872856428 5.9927e-05 deg
peri 219.9572022226328 6.166e-05 deg
M 310.9372372296372 1.6106e-05 deg
tp 2456964.781659473954
(2014-Nov-03.28165947)
5.4428e-05 JED
period 1205.423300098964
3.30
7.9037e-06
2.164e-08
d
yr
n .2986502749452781 1.9582e-09 deg/d
Q 2.619963370016699 1.1452e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      711  
   data-arc span      12003 days (32.86 yr)  
   first obs. used      1981-08-23  
   last obs. used      2014-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54897  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 13:00:14  

Additional Information
 Earth MOID = .813553 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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