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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1817032676158982 5.4938e-08  
a 2.217340683144949 7.5716e-09 au
q 1.814442635599844 1.2378e-07 au
i 6.088561914631857 5.4996e-06 deg
node 142.8216990868433 3.9953e-05 deg
peri 220.236020311117 4.1564e-05 deg
M 189.5213079882074 1.09e-05 deg
tp 2458171.603298878730
(2018-Feb-22.10329888)
3.7433e-05 JED
period 1205.999325605577
3.30
6.1772e-06
1.691e-08
d
yr
n .2985076296118412 1.529e-09 deg/d
Q 2.620238730690054 8.9474e-09 au
  Orbit Determination Parameters
   # obs. used (total)      996  
   data-arc span      12642 days (34.61 yr)  
   first obs. used      1981-08-23  
   last obs. used      2016-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57066  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:53:18  

Additional Information
 Earth MOID = .815111 au 
 Jupiter MOID = 2.82688 au 
 T_jup = 3.623 
[ 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
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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