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101923 (1999 RC18)
Classification: Main-belt Asteroid          SPK-ID: 2101923
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .210396829774178 3.719e-08  
a 2.420199238322425 7.6707e-09 au
q 1.910996991157506 9.0604e-08 au
i 2.241970799346003 4.8814e-06 deg
node 184.4147435048597 7.6829e-05 deg
peri 211.0477540071408 7.7441e-05 deg
M 200.0537280987007 9.1665e-06 deg
tp 2459811.507762584127
(2022-Aug-20.00776258)
3.6146e-05 TDB
period 1375.229268651049
3.77
6.5381e-06
1.79e-08
d
yr
n .2617745333133587 1.2445e-09 deg/d
Q 2.929401485487343 9.2846e-09 au
  Orbit Determination Parameters
   # obs. used (total)      962  
   data-arc span      7557 days (20.69 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:25  

Additional Information
 Earth MOID = .917071 au 
 Jupiter MOID = 2.50071 au 
 T_jup = 3.482 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457167.5 (2015-May-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2084292755297363 3.7053e-08  
q 1.91664825595467 9.0112e-08 au
tp 2457058.559473838569
(2015-Feb-05.05947384)
3.3627e-05 TDB
node 184.4371427909098 7.6958e-05 deg
peri 210.8323542293584 7.7584e-05 deg
i 2.237506976344877 4.8803e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      962  
   data-arc span      7557 days (20.69 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:25  

Additional Information
 Jupiter MOID = 2.50071 au 
 T_jup = 3.482 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.372940709672743E-15 -3.331320885793259E-15 -5.753300393832372E-13 1.01452183311895E-14 -1.845548586938015E-13 -7.72099439965637E-16
q -3.331320885793259E-15 8.1201049382834E-15 1.403615645047755E-12 -2.483653110582882E-14 4.50369763811759E-13 1.926528004842664E-15
tp -5.753300393832372E-13 1.403615645047755E-12 1.130800603778173E-9 -5.329404618438848E-12 3.352671999115702E-10 4.26580245630955E-13
node 1.01452183311895E-14 -2.483653110582882E-14 -5.329404618438848E-12 5.922545234736745E-9 -5.919362732701241E-9 -3.388695965512893E-11
peri -1.845548586938015E-13 4.50369763811759E-13 3.352671999115702E-10 -5.919362732701241E-9 6.019288608575672E-9 3.398029007536733E-11
i -7.72099439965637E-16 1.926528004842664E-15 4.26580245630955E-13 -3.388695965512893E-11 3.398029007536733E-11 2.381699362079092E-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 16.01   n/a E2021B55  

101923 (1999 RC18)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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