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103040 (1999 XH121)
Classification: Main-belt Asteroid          SPK-ID: 2103040
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1043139225380567 5.4242e-08  
a 2.709555104431556 1.9283e-08 au
q 2.426910783155286 1.5615e-07 au
i 8.546056613478365 5.3333e-06 deg
node 261.0650885715783 3.6057e-05 deg
peri 81.7977109372608 4.4811e-05 deg
M 328.4967006301164 2.7026e-05 deg
tp 2459343.060414005925
(2021-May-08.56041401)
0.00012292 TDB
period 1629.091240239912
4.46
1.7391e-05
4.761e-08
d
yr
n .2209820979376107 2.359e-09 deg/d
Q 2.992199425707825 2.1295e-08 au
  Orbit Determination Parameters
   # obs. used (total)      507  
   data-arc span      7603 days (20.82 yr)  
   first obs. used      1999-11-16  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55865  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:49  

Additional Information
 Earth MOID = 1.4351 au 
 Jupiter MOID = 2.3695 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456938.5 (2014-Oct-08.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10349166735501 5.4072e-08  
q 2.427655180468532 1.5516e-07 au
tp 2457720.423387363796
(2016-Nov-27.92338736)
0.00011894 TDB
node 261.0980438272584 3.6028e-05 deg
peri 82.84020720050994 4.5014e-05 deg
i 8.55044337847751 5.3356e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      507  
   data-arc span      7603 days (20.82 yr)  
   first obs. used      1999-11-16  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55865  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:49  

Additional Information
 Jupiter MOID = 2.3695 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.923732112091497E-15 -8.350640248828203E-15 -9.659767889414669E-13 1.121299012365248E-14 -1.325988230290299E-13 -5.592241620687833E-15
q -8.350640248828203E-15 2.40735951410769E-14 3.127734518967763E-12 -3.717474448847856E-14 4.381583625096304E-13 1.661004467250818E-14
tp -9.659767889414669E-13 3.127734518967763E-12 1.414700273359018E-8 -4.617834912367962E-11 3.229244051446602E-9 3.827685483941367E-12
node 1.121299012365248E-14 -3.717474448847856E-14 -4.617834912367962E-11 1.298038243119075E-9 -1.293086795502339E-9 2.390899988156275E-11
peri -1.325988230290299E-13 4.381583625096304E-13 3.229244051446602E-9 -1.293086795502339E-9 2.026290026764092E-9 -2.294631381968646E-11
i -5.592241620687833E-15 1.661004467250818E-14 3.827685483941367E-12 2.390899988156275E-11 -2.294631381968646E-11 2.846844073451438E-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 15.39   n/a E2021B55  

103040 (1999 XH121)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 XH121 = 2003 RM17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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