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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1818581165167768 5.879e-08  
a 2.216378918028818 8.1385e-09 AU
q 1.813312422508606 1.3275e-07 AU
i 6.090334854741517 5.5566e-06 deg
node 142.8306187979299 4.6754e-05 deg
peri 219.9601421680537 4.845e-05 deg
M 10.66616045061171 1.1582e-05 deg
tp 2456964.791627679297
(2014-Nov-03.29162768)
3.8747e-05 JED
period 1205.214762610834
3.30
6.6382e-06
1.817e-08
d
yr
n .298701950198601 1.6452e-09 deg/d
Q 2.619445413549031 9.6185e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      837  
   data-arc span      12202 days (33.41 yr)  
   first obs. used      1981-08-23  
   last obs. used      2015-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53072  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:31:27  

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
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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