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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01142803255377379 4.7405e-08  
a 3.000954618513206 3.1975e-08 AU
q 2.96665961144044 1.4882e-07 AU
i 10.17230733913487 7.9059e-06 deg
node 350.0372920685594 2.7277e-05 deg
peri 258.8774333216999 0.00037872 deg
M 330.9427228720281 0.00037819 deg
tp 2457153.763939116688
(2015-May-11.26393912)
0.001994 JED
period 1898.83648901479
5.20
3.0348e-05
8.309e-08
d
yr
n .1895897841034147 3.0301e-09 deg/d
Q 3.035249625585973 3.2341e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1121  
   data-arc span      9069 days (24.83 yr)  
   first obs. used      1990-08-23  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48771  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:43:59  

Additional Information
 Earth MOID = 1.9776 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  
rotation period rot_per 53.2353 h n/a LCDB (Rev. 2015-July); 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., in press.]

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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