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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05066718962720455 3.6031e-08  
a 2.562011879502862 1.0291e-08 au
q 2.43220193777694 9.5276e-08 au
i 15.34128211761861 4.7928e-06 deg
node 160.2578132674451 1.1809e-05 deg
peri 323.4765052460339 5.8322e-05 deg
M 47.86955439211539 5.4071e-05 deg
tp 2458801.328580061850
(2019-Nov-13.82858006)		 0.00022537 TDB
period 1497.85624888842
4.10		 9.0251e-06
2.471e-08		 d
yr
n .240343491084115 1.4482e-09 deg/d
Q 2.691821821228784 1.0813e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      16556 days (45.33 yr)  
   first obs. used      1975-03-15  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42178  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:45:26  

Additional Information
 Earth MOID = 1.4565 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)  
rotation period rot_per 4.56853 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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