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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05039586413414032 1.3396e-08  
a 2.56189029463368 9.3374e-09 au
q 2.432781619418748 3.498e-08 au
i 15.34201137679899 3.6504e-07 deg
node 160.2575274585469 3.273e-06 deg
peri 323.3533429345089 3.4653e-05 deg
M 143.2035960843 3.0746e-05 deg
tp 2458800.713521306227
(2019-Nov-13.21352131)
0.00012837 TDB
period 1497.749624970995
4.10
8.1883e-06
2.242e-08
d
yr
n .2403606009962924 1.3141e-09 deg/d
Q 2.690998969848611 9.808e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2775  
   data-arc span      16908 days (46.29 yr)  
   first obs. used      1975-03-15  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:18:02  

Additional Information
 Earth MOID = 1.45782 au 
 Jupiter MOID = 2.32349 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 12.78   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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