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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01176480411230042 4.7248e-08  
a 3.001976466690884 3.198e-08 au
q 2.96665880161053 1.4848e-07 au
i 10.17216351436576 7.8995e-06 deg
node 350.0312190912746 2.7271e-05 deg
peri 259.1934778367846 0.00036806 deg
M 46.45036956574344 0.00036711 deg
tp 2457155.370248582563
(2015-May-12.87024858)
0.0019386 JED
period 1899.806424260577
5.20
3.0358e-05
8.312e-08
d
yr
n .1894929901293051 3.028e-09 deg/d
Q 3.037294131771238 3.2357e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1125  
   data-arc span      9087 days (24.88 yr)  
   first obs. used      1990-08-23  
   last obs. used      2015-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48685  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:14:33  

Additional Information
 Earth MOID = 1.97478 au 
 Jupiter MOID = 1.9601 au 
 T_jup = 3.228 
[ 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  
rotation period rot_per 53.2353 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

29172 (1990 QL4)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar
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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