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11819 Millarca (1981 ER35)
Classification: Main-belt Asteroid          SPK-ID: 2011819
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1047175861328673 4.0137e-08  
a 3.006319462957903 1.7007e-08 au
q 2.691504945652693 1.2223e-07 au
i 8.085867429409728 3.8659e-06 deg
node 289.8556915693854 3.3646e-05 deg
peri 109.4663787070729 4.2115e-05 deg
M 359.0173162916022 2.2615e-05 deg
tp 2459205.697115575206
(2020-Dec-22.19711558)
0.00011959 TDB
period 1903.930624966376
5.21
1.6156e-05
4.423e-08
d
yr
n .1890825197511373 1.6045e-09 deg/d
Q 3.321133980263112 1.8788e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      15053 days (41.21 yr)  
   first obs. used      1979-12-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49734  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:58:26  

Additional Information
 Earth MOID = 1.7125 au 
 Jupiter MOID = 2.07226 au 
 T_jup = 3.228 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457620.5 (2016-Aug-20.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1064743687159525 4.1159e-08  
q 2.686271375361434 1.2535e-07 au
tp 2457285.644666611446
(2015-Sep-20.14466661)
0.00011937 TDB
node 290.1832404670147 3.382e-05 deg
peri 106.6529103297936 4.1636e-05 deg
i 8.062442079149768 3.8586e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      15053 days (41.21 yr)  
   first obs. used      1979-12-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49734  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:58:26  

Additional Information
 Jupiter MOID = 2.07226 au 
 T_jup = 3.228 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.694065786868049E-15 -5.123145719509391E-15 -1.159766756635955E-12 -8.323795704897265E-15 -2.318053064855759E-13 -3.711703699163294E-15
q -5.123145719509391E-15 1.571343645432002E-14 2.94750001957972E-12 2.652570312998343E-14 5.914510053747167E-13 1.205155929343158E-14
tp -1.159766756635955E-12 2.94750001957972E-12 1.425027893554641E-8 2.504301112925272E-11 2.928669752040461E-9 5.897646903341996E-12
node -8.323795704897265E-15 2.652570312998343E-14 2.504301112925272E-11 1.14375949679208E-9 -1.127702576408125E-9 1.258763398284927E-11
peri -2.318053064855759E-13 5.914510053747167E-13 2.928669752040461E-9 -1.127702576408125E-9 1.73359269179253E-9 -1.133274619854316E-11
i -3.711703699163294E-15 1.205155929343158E-14 5.897646903341996E-12 1.258763398284927E-11 -1.133274619854316E-11 1.488885179516648E-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 14.60   n/a E2021B10  

11819 Millarca           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Millarca Valenzuela (b. 1977) is a geologist at the Pontificia Universidad Catolica de Chile, and a specialist in meteorites, undertaking many search expeditions in the Atacama Desert.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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