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13581 (1993 QX4)
Classification: Main-belt Asteroid          SPK-ID: 2013581
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0506671867265155 3.6504e-08  
a 2.562011881101489 1.0909e-08 au
q 2.432201946726169 9.7003e-08 au
i 15.34128206307519 4.8403e-06 deg
node 160.2578098440755 1.291e-05 deg
peri 323.4765096912021 5.9201e-05 deg
M 47.86955248170941 5.4836e-05 deg
tp 2458801.328587824082
(2019-Nov-13.82858782)
0.00022849 TDB
period 1497.856250290354
4.10
9.5667e-06
2.619e-08
d
yr
n .240343490859163 1.5351e-09 deg/d
Q 2.69182181547681 1.1462e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2248  
   data-arc span      16398 days (44.90 yr)  
   first obs. used      1975-03-15  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44299  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:41:08  

Additional Information
 Earth MOID = 1.45651 au 
 Jupiter MOID = 2.32411 au 
 T_jup = 3.383 
[ 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 12.7   n/a MPO384875  
diameter diameter 7.528 km 0.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.312   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

13581 (1993 QX4)          Discovered 1993-Aug-19 by Helin, E. F. at Palomar
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 QX4 = 1975 EW4 = 1987 DW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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