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58168 (1990 QB9)
Classification: Main-belt Asteroid          SPK-ID: 2058168
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1911417962627112 4.0006e-08  
a 2.306553374527966 8.9617e-09 au
q 1.865674619344873 9.227e-08 au
i 6.906289931751042 5.1339e-06 deg
node 146.3875158211453 2.7925e-05 deg
peri 241.0941309919326 3.0661e-05 deg
M 142.5188787290059 1.3671e-05 deg
tp 2458493.960186449561
(2019-Jan-10.46018645)
4.7697e-05 TDB
period 1279.510016528392
3.50
7.4569e-06
2.042e-08
d
yr
n .2813577036127969 1.6397e-09 deg/d
Q 2.74743212971106 1.0675e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1098  
   data-arc span      10871 days (29.76 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54039  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:52:04  

Additional Information
 Earth MOID = .880936 au 
 Jupiter MOID = 2.72281 au 
 T_jup = 3.553 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO302379  
diameter diameter 2.494 km 0.399 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.311   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58168 (1990 QB9)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 QB9 = 1992 DW8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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