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21796 (1999 SH11)
Classification: Main-belt Asteroid          SPK-ID: 2021796
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1893134109674489 3.6175e-08  
a 2.780293132609963 1.4073e-08 au
q 2.253946356186197 1.0389e-07 au
i 8.939753363698161 4.2194e-06 deg
node 70.2488323530591 2.4577e-05 deg
peri 225.3214871020506 2.7242e-05 deg
M 315.7032062644909 1.3221e-05 deg
tp 2459604.855082608814
(2022-Jan-25.35508261)
6.2459e-05 TDB
period 1693.301555571628
4.64
1.2856e-05
3.52e-08
d
yr
n .2126024149776857 1.6142e-09 deg/d
Q 3.306639909033729 1.6737e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1355  
   data-arc span      13597 days (37.23 yr)  
   first obs. used      1984-05-07  
   last obs. used      2021-07-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52154  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:57  

Additional Information
 Earth MOID = 1.24796 au 
 Jupiter MOID = 1.91636 au 
 T_jup = 3.290 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457812.5 (2017-Feb-28.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1885708586157382 3.6203e-08  
q 2.256619649184386 1.0394e-07 au
tp 2457909.026349813585
(2017-Jun-04.52634981)
6.1542e-05 TDB
node 70.26888675412398 2.4571e-05 deg
peri 225.0149756343187 2.7254e-05 deg
i 8.939822813301253 4.2193e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1355  
   data-arc span      13597 days (37.23 yr)  
   first obs. used      1984-05-07  
   last obs. used      2021-07-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52154  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:57  

Additional Information
 Jupiter MOID = 1.91636 au 
 T_jup = 3.290 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.310633775734142E-15 -3.741382866807998E-15 -5.928700616028776E-13 -4.278306439703907E-15 -6.8881242205776E-14 -1.45432475729436E-16
q -3.741382866807998E-15 1.080298268621774E-14 1.638840285551392E-12 1.415604635565527E-14 1.828296791467101E-13 4.537578539231207E-16
tp -5.928700616028776E-13 1.638840285551392E-12 3.78745247820088E-9 1.507307115720752E-11 7.397228489068038E-10 3.541441607480527E-12
node -4.278306439703907E-15 1.415604635565527E-14 1.507307115720752E-11 6.037361303120353E-10 -5.931295392362189E-10 -1.73639658447336E-11
peri -6.8881242205776E-14 1.828296791467101E-13 7.397228489068038E-10 -5.931295392362189E-10 7.427595044281152E-10 1.78786521857361E-11
i -1.45432475729436E-16 4.537578539231207E-16 3.541441607480527E-12 -1.73639658447336E-11 1.78786521857361E-11 1.780244017043746E-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 14.56   n/a MPO636391  
diameter diameter 5.996 km 0.355 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21796 (1999 SH11)          Discovered 1999-Sep-30 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SH11 = 1984 JO = 1998 KX33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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