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121322 (1999 SQ1)
Classification: Main-belt Asteroid          SPK-ID: 2121322
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2281979951553124 4.7888e-08  
a 2.623888712781057 1.1002e-08 au
q 2.025122569013766 1.2944e-07 au
i 2.509263204857966 4.5602e-06 deg
node 13.73781754168593 8.1663e-05 deg
peri 338.0238270588091 8.224e-05 deg
M 56.53372851319351 7.353e-06 deg
tp 2459152.706752737275
(2020-Oct-30.20675274)
3.1709e-05 TDB
period 1552.446147154415
4.25
9.7645e-06
2.673e-08
d
yr
n .2318921018032533 1.4585e-09 deg/d
Q 3.222654856548348 1.3513e-08 au
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1999-09-15  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:10:45  

Additional Information
 Earth MOID = 1.01907 au 
 Jupiter MOID = 2.21452 au 
 T_jup = 3.365 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457984.5 (2017-Aug-19.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2293327912234436 4.7814e-08  
q 2.021536440413209 1.295e-07 au
tp 2457601.889693291752
(2016-Aug-01.38969329)
3.3374e-05 TDB
node 13.81754559471797 8.16e-05 deg
peri 338.2327107953889 8.2169e-05 deg
i 2.51095310485207 4.5615e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1999-09-15  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:10:45  

Additional Information
 Jupiter MOID = 2.21452 au 
 T_jup = 3.365 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.286201298805208E-15 -6.18066588292865E-15 2.992540806917976E-13 -7.537310326607229E-15 1.313895548191014E-13 -3.819963608993933E-15
q -6.18066588292865E-15 1.676925116632788E-14 -8.833972812757204E-13 2.010872586806217E-14 -3.707651155713198E-13 1.039975538568249E-14
tp 2.992540806917976E-13 -8.833972812757204E-13 1.113856427775199E-9 3.16603046339135E-12 3.297863357587005E-10 -5.535765522454667E-14
node -7.537310326607229E-15 2.010872586806217E-14 3.16603046339135E-12 6.658503105902494E-9 -6.650856867849321E-9 -1.052363196183027E-10
peri 1.313895548191014E-13 -3.707651155713198E-13 3.297863357587005E-10 -6.650856867849321E-9 6.75182616481205E-9 1.051025907981828E-10
i -3.819963608993933E-15 1.039975538568249E-14 -5.535765522454667E-14 -1.052363196183027E-10 1.051025907981828E-10 2.080767516305869E-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 16.35   n/a E2021B55  

121322 (1999 SQ1)          Discovered 1999-Sep-19 by Sarounova, L. at Ondrejov
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1999 SQ1 = 1999 RQ213 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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