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19118 (1981 SD2)
Classification: Main-belt Asteroid          SPK-ID: 2019118
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1311450237935862 1.5082e-08  
a 2.384014410673823 7.4874e-09 au
q 2.071362784061752 3.5208e-08 au
i 6.396062357290112 3.22e-07 deg
node 35.04116837833586 5.6984e-06 deg
peri 346.1122050307131 8.467e-06 deg
M 218.7169782702908 7.3764e-06 deg
tp 2459728.153976506856
(2022-May-28.65397651)
2.8689e-05 TDB
period 1344.502893673062
3.68
6.334e-06
1.734e-08
d
yr
n .267756954406035 1.2614e-09 deg/d
Q 2.696666037285893 8.4694e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2349  
   data-arc span      14189 days (38.85 yr)  
   first obs. used      1981-09-08  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:46:07  

Additional Information
 Earth MOID = 1.07375 au 
 Jupiter MOID = 2.75862 au 
 T_jup = 3.516 
[ 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 13.70   n/a E2021B10  
diameter diameter 4.594 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.230   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19118 (1981 SD2)          Discovered 1981-Sep-26 by Thomas, N. G. at Anderson Mesa
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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