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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05057166902869212 3.592e-08  
a 2.561620439052961 1.0235e-08 au
q 2.432075018032042 9.4907e-08 au
i 15.34190533786613 4.7906e-06 deg
node 160.2590924844287 1.1809e-05 deg
peri 323.3279248754783 5.8427e-05 deg
M 96.09752100026108 5.4092e-05 deg
tp 2458800.757540474354
(2019-Nov-13.25754047)		 0.00022579 TDB
period 1497.512984011749
4.10		 8.9749e-06
2.457e-08		 d
yr
n .2403985834136685 1.4408e-09 deg/d
Q 2.69116586007388 1.0752e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2586  
   data-arc span      16742 days (45.84 yr)  
   first obs. used      1975-03-15  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:10:37  

Additional Information
 Earth MOID = 1.45636 au 
 Jupiter MOID = 2.32408 au 
 T_jup = 3.383 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457027.5 (2015-Jan-05.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05031043022893381 3.6932e-08  
q 2.432895260544516 9.7677e-08 au
tp 2457309.358550801335
(2015-Oct-13.85855080)		 0.00022644 TDB
node 160.2855439423683 1.1805e-05 deg
peri 325.0009126749433 5.7806e-05 deg
i 15.34317952490397 4.7908e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2586  
   data-arc span      16742 days (45.84 yr)  
   first obs. used      1975-03-15  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:10:37  

Additional Information
 Jupiter MOID = 2.32408 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.363935700921906E-15 -3.590498606897917E-15 4.715083218203548E-12 1.040486272379519E-16 1.171061459423124E-12 1.261075269358034E-15
q -3.590498606897917E-15 9.54073300430794E-15 -1.291798092260385E-11 -9.000457644230724E-16 -3.21227149960519E-12 -3.421023931386888E-15
tp 4.715083218203548E-12 -1.291798092260385E-11 5.127405530904621E-8 -1.536505072154583E-11 1.282098485276975E-8 1.787235976938355E-11
node 1.040486272379519E-16 -9.000457644230724E-16 -1.536505072154583E-11 1.393596144225627E-10 -1.377870103370409E-10 1.412889780762078E-11
peri 1.171061459423124E-12 -3.21227149960519E-12 1.282098485276975E-8 -1.377870103370409E-10 3.341563409141067E-9 -9.160932623358039E-12
i 1.261075269358034E-15 -3.421023931386888E-15 1.787235976938355E-11 1.412889780762078E-11 -9.160932623358039E-12 2.295167555113436E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.78   n/a E2021B10  
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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