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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181665411795372 5.747e-08  
a 2.217142145249432 7.7983e-09 au
q 1.814364104423819 1.2982e-07 au
i 6.090128262359118 5.5265e-06 deg
node 142.8301993827287 4.2872e-05 deg
peri 220.0932344220911 4.4663e-05 deg
M 130.0047877184221 1.119e-05 deg
tp 2456965.042696678899
(2014-Nov-03.54269668)
3.7142e-05 JED
period 1205.837353737568
3.30
6.3619e-06
1.742e-08
d
yr
n .2985477260960257 1.5751e-09 deg/d
Q 2.619920186075044 9.215e-09 au
  Orbit Determination Parameters
   # obs. used (total)      906  
   data-arc span      12535 days (34.32 yr)  
   first obs. used      1981-08-23  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57056  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:09:05  

Additional Information
 Earth MOID = .814153 au 
 Jupiter MOID = 2.82679 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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