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190818 (2001 SR2)
Classification: Main-belt Asteroid          SPK-ID: 2190818
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1928593781091846 5.7095e-08  
a 2.278503357249605 1.0099e-08 au
q 1.839072616750757 1.296e-07 au
i 5.442442839883776 6.3087e-06 deg
node 28.90650139888893 5.3312e-05 deg
peri 4.717316433296396 5.5658e-05 deg
M 197.7235969639624 1.9743e-05 deg
tp 2459766.772938950151
(2022-Jul-06.27293895)
7.1788e-05 TDB
period 1256.240921095487
3.44
8.3519e-06
2.287e-08
d
yr
n .2865692352117197 1.9052e-09 deg/d
Q 2.717934097748453 1.2047e-08 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      6811 days (18.65 yr)  
   first obs. used      2001-08-25  
   last obs. used      2020-04-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:09:15  

Additional Information
 Earth MOID = .844232 au 
 Jupiter MOID = 2.71957 au 
 T_jup = 3.576 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456928.5 (2014-Sep-28.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1919922192976123 5.7029e-08  
q 1.841798722690181 1.2947e-07 au
tp 2457251.977521136083
(2015-Aug-17.47752114)
6.0133e-05 TDB
node 28.93913202446418 5.3324e-05 deg
peri 4.382125279582891 5.5703e-05 deg
i 5.442264058796072 6.3071e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      6811 days (18.65 yr)  
   first obs. used      2001-08-25  
   last obs. used      2020-04-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:09:15  

Additional Information
 Jupiter MOID = 2.71957 au 
 T_jup = 3.576 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.252256063755487E-15 -7.368349610908577E-15 -3.218744287330866E-13 1.192656221131748E-14 -2.06975286388869E-13 4.629827395958976E-17
q -7.368349610908577E-15 1.676129686121274E-14 1.063074640400618E-12 -2.643437506060295E-14 5.474410952708976E-13 -5.070563192951504E-17
tp -3.218744287330866E-13 1.063074640400618E-12 3.616004358589715E-9 1.489926008119821E-12 9.754560732794646E-10 -9.258203801987726E-13
node 1.192656221131748E-14 -2.643437506060295E-14 1.489926008119821E-12 2.843445414316772E-9 -2.830252722976853E-9 -8.457569026786338E-11
peri -2.06975286388869E-13 5.474410952708976E-13 9.754560732794646E-10 -2.830252722976853E-9 3.102860820561516E-9 8.393178927906159E-11
i 4.629827395958976E-17 -5.070563192951504E-17 -9.258203801987726E-13 -8.457569026786338E-11 8.393178927906159E-11 3.977931781105804E-11

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 16.51   n/a E2021B55  

190818 (2001 SR2)          Discovered 2001-Sep-17 by Yeung, W. K. Y. at Desert Eagle
Reference: 20080917/Numbers.arcLast Updated: 2008-09-19

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