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181906 (1999 SC4)
Classification: Main-belt Asteroid          SPK-ID: 2181906
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2283134402752322 7.0982e-08  
a 3.084308487981626 3.1219e-08 au
q 2.380119406220441 2.3091e-07 au
i 9.35043430643422 7.2266e-06 deg
node 5.330929457040248 2.9595e-05 deg
peri 318.4353370521733 3.1686e-05 deg
M .4962971051071353 1.2784e-05 deg
tp 2459197.772439567884
(2020-Dec-14.27243957)
7.0242e-05 TDB
period 1978.495835371913
5.42
3.004e-05
8.225e-08
d
yr
n .1819564103011256 2.7626e-09 deg/d
Q 3.788497569742811 3.8347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      556  
   data-arc span      7567 days (20.72 yr)  
   first obs. used      1999-09-29  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:32  

Additional Information
 Earth MOID = 1.37632 au 
 Jupiter MOID = 1.63315 au 
 T_jup = 3.166 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.70   n/a MPCxxxxx  
diameter diameter 3.157 km 0.335 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181906 (1999 SC4)          Discovered 1999-Sep-29 by Korlevic, K. at Visnjan
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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