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29172 (1990 QL4)
Classification: Main-belt Asteroid          SPK-ID: 2029172
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01132667907181393 4.5992e-08  
a 3.000879596279912 3.067e-08 AU
q 2.966889596159695 1.4058e-07 AU
i 10.17248131321739 9.2788e-06 deg
node 350.0380703786125 2.5342e-05 deg
peri 258.5908916910586 0.00046817 deg
M 293.2970901953234 0.00046993 deg
tp 2457152.314359782312
(2015-May-09.81435978)
0.0024777 JED
period 1898.765284640592
5.20
2.9109e-05
7.97e-08
d
yr
n .1895968937878189 2.9067e-09 deg/d
Q 3.034869596400129 3.1018e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1069  
   data-arc span      8629 days (23.62 yr)  
   first obs. used      1990-08-23  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53356  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:28:13  

Additional Information
 Earth MOID = 1.97611 AU 
 T_jup = 3.229 
[ 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 12.9 mag n/a MPO257067  

29172 (1990 QL4)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar (675)
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QL4 = 2000 OB26 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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