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JPL Small-Body Database Browser
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109902 (2001 SH21)
Classification: Main-belt Asteroid          SPK-ID: 2109902
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05031482284689144 4.1943e-08  
a 2.553078638935183 1.1575e-08 au
q 2.424620939502976 1.0861e-07 au
i 4.605035159163531 4.7773e-06 deg
node 117.0071664997139 5.5373e-05 deg
peri 258.2845811326401 7.2921e-05 deg
M 206.5095669515448 4.734e-05 deg
tp 2459635.792203330397
(2022-Feb-25.29220333)
0.00019679 TDB
period 1490.028978723014
4.08
1.0133e-05
2.774e-08
d
yr
n .2416060393057103 1.6431e-09 deg/d
Q 2.681536338367389 1.2158e-08 au
  Orbit Determination Parameters
   # obs. used (total)      803  
   data-arc span      10568 days (28.93 yr)  
   first obs. used      1991-02-22  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58711  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:35:11  

Additional Information
 Earth MOID = 1.42972 au 
 Jupiter MOID = 2.53664 au 
 T_jup = 3.433 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456475.5 (2013-Jul-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04859265479904865 4.1805e-08  
q 2.429573920381561 1.0807e-07 au
tp 2456651.922211130912
(2013-Dec-25.42221113)
0.00020148 TDB
node 117.0436428594727 5.5313e-05 deg
peri 257.6192775879436 7.409e-05 deg
i 4.606507588251675 4.7794e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      803  
   data-arc span      10568 days (28.93 yr)  
   first obs. used      1991-02-22  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58711  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:35:11  

Additional Information
 Jupiter MOID = 2.53664 au 
 T_jup = 3.433 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.747698273213086E-15 -4.494323382302883E-15 -1.919282428720853E-12 2.04991821163E-14 -5.061722341942351E-13 -6.251450358183785E-16
q -4.494323382302883E-15 1.167897971394798E-14 5.140007865231938E-12 -5.388834100984672E-14 1.347295701428396E-12 1.761494773639892E-15
tp -1.919282428720853E-12 5.140007865231938E-12 4.059447431302345E-8 -4.901268854043502E-11 9.950195770552527E-9 6.579820065867439E-12
node 2.04991821163E-14 -5.388834100984672E-14 -4.901268854043502E-11 3.059503039069357E-9 -3.061394033657911E-9 4.28825897128396E-11
peri -5.061722341942351E-13 1.347295701428396E-12 9.950195770552527E-9 -3.061394033657911E-9 5.489400804594635E-9 -4.114586701010906E-11
i -6.251450358183785E-16 1.761494773639892E-15 6.579820065867439E-12 4.28825897128396E-11 -4.114586701010906E-11 2.284297658735221E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO268016  

109902 (2001 SH21)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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