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118288 (1998 SK4)
Classification: Main-belt Asteroid          SPK-ID: 2118288
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .216605122408401 6.1921e-08  
a 2.296469184058106 5.5415e-09 au
q 1.799042195338079 1.4071e-07 au
i 1.611955402513678 3.9113e-06 deg
node 141.1045708957313 0.00017265 deg
peri 238.7161469420727 0.00017302 deg
M 124.5166849216043 7.7183e-06 deg
tp 2458760.842578125205
(2019-Oct-04.34257813)
2.7247e-05 TDB
period 1271.128218475919
3.48
4.601e-06
1.26e-08
d
yr
n .2832129715691777 1.0251e-09 deg/d
Q 2.793896172778132 6.7418e-09 au
  Orbit Determination Parameters
   # obs. used (total)      730  
   data-arc span      8212 days (22.48 yr)  
   first obs. used      1998-09-20  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:34  

Additional Information
 Earth MOID = .800712 au 
 Jupiter MOID = 2.6668 au 
 T_jup = 3.562 
[ 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 16.61   n/a E2021B55  

118288 (1998 SK4)          Discovered 1998-Sep-20 by Comba, P. G. at Prescott
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1998 SK4 = 2003 AW27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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