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13364 (1998 UK20)
Classification: Main-belt Asteroid          SPK-ID: 2013364
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .114098478364574 4.3531e-08  
a 2.734374299105947 1.5401e-08 au
q 2.42238635229876 1.243e-07 au
i 15.087018500573 4.7958e-06 deg
node 20.93068267172775 1.5389e-05 deg
peri 231.4821459004627 2.4492e-05 deg
M 62.8836315714216 1.9753e-05 deg
tp 2458712.016827296126
(2019-Aug-16.51682730)
9.0381e-05 TDB
period 1651.52583554975
4.52
1.3953e-05
3.82e-08
d
yr
n .2179802412114039 1.8416e-09 deg/d
Q 3.046362245913134 1.7159e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2633  
   data-arc span      15973 days (43.73 yr)  
   first obs. used      1975-11-26  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39036  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:37:23  

Additional Information
 Earth MOID = 1.43943 au 
 Jupiter MOID = 2.02881 au 
 T_jup = 3.294 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456759.5 (2014-Apr-12.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1126721253079648 4.3644e-08  
q 2.426175008555234 1.2414e-07 au
tp 2457061.495619728937
(2015-Feb-07.99561973)
9.1674e-05 TDB
node 21.00664303445909 1.5376e-05 deg
peri 231.7580600340265 2.4662e-05 deg
i 15.09279352511293 4.7974e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2633  
   data-arc span      15973 days (43.73 yr)  
   first obs. used      1975-11-26  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39036  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:37:23  

Additional Information
 Jupiter MOID = 2.02881 au 
 T_jup = 3.294 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.904759923260466E-15 -5.3892686554778E-15 -8.329047859949175E-13 3.570432249917086E-15 -1.47171448823161E-13 1.933585534722878E-15
q -5.3892686554778E-15 1.541036763898777E-14 2.174092744407872E-12 -1.065946190503897E-14 3.728835049161845E-13 -4.248672945468703E-15
tp -8.329047859949175E-13 2.174092744407872E-12 8.404106849811473E-9 -2.622043645784438E-12 1.782892263046193E-9 3.77733967489788E-12
node 3.570432249917086E-15 -1.065946190503897E-14 -2.622043645784438E-12 2.364204366043348E-10 -2.284086397049914E-10 8.600169246062277E-12
peri -1.47171448823161E-13 3.728835049161845E-13 1.782892263046193E-9 -2.284086397049914E-10 6.082114914973849E-10 -7.364938091880768E-12
i 1.933585534722878E-15 -4.248672945468703E-15 3.77733967489788E-12 8.600169246062277E-12 -7.364938091880768E-12 2.301550605566141E-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 12.7   n/a MPO395132  
diameter diameter 11.329 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.114 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.121   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13364 (1998 UK20)          Discovered 1998-Oct-20 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000124/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UK20 = 1975 WT1 = 1980 XM1 = 1991 CH3 = 1996 DE3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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