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74553 (1999 KR1)
Classification: Main-belt Asteroid          SPK-ID: 2074553
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07313095762968749 4.5902e-08  
a 3.130346646998237 2.0708e-08 au
q 2.901421398990375 1.4195e-07 au
i 19.18492433348741 4.7574e-06 deg
node 34.97932740112275 1.3668e-05 deg
peri 309.5787585277656 3.3592e-05 deg
M 163.0781008300833 3.1792e-05 deg
tp 2458084.110254779359
(2017-Nov-26.61025478)
0.00017759 TDB
period 2022.958978552032
5.54
2.0073e-05
5.496e-08
d
yr
n .1779571428866423 1.7658e-09 deg/d
Q 3.359271895006099 2.2222e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1525  
   data-arc span      7706 days (21.10 yr)  
   first obs. used      1999-03-25  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4735  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:06:27  

Additional Information
 Earth MOID = 1.9331 au 
 Jupiter MOID = 1.99737 au 
 T_jup = 3.123 
[ 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 13.3   n/a MPO502608  
diameter diameter 10.090 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.084   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74553 (1999 KR1)          Discovered 1999-May-16 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 KR1 = 2001 SJ54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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