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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909737480902836 4.41e-08  
a 2.306995832003781 9.7504e-09 au
q 1.866420191137357 1.0308e-07 au
i 6.905285003162963 5.1745e-06 deg
node 146.3896400572912 3.1119e-05 deg
peri 241.1573776875891 3.3679e-05 deg
M 29.94133903403057 1.3495e-05 deg
tp 2458494.052035843986
(2019-Jan-10.55203584)
4.7797e-05 TDB
period 1279.878199589208
3.50
8.114e-06
2.221e-08
d
yr
n .2812767653324716 1.7832e-09 deg/d
Q 2.747571472870205 1.1612e-08 au
  Orbit Determination Parameters
   # obs. used (total)      941  
   data-arc span      10372 days (28.40 yr)  
   first obs. used      1990-08-16  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54123  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:33:25  

Additional Information
 Earth MOID = .880992 au 
 Jupiter MOID = 2.72004 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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