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21271 (1996 RF33)
Classification: Jupiter Trojan          SPK-ID: 2021271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .007311118451630847 4.1999e-08  
a 5.145397915130157 8.7254e-08 au
q 5.107779301491866 2.7635e-07 au
i 6.689673274259725 3.8557e-06 deg
node 112.7654407470303 4.758e-05 deg
peri 351.5998107273128 0.00040763 deg
M 299.7678289141917 0.00040653 deg
tp 2460109.768250997809
(2023-Jun-14.26825100)
0.0048186 TDB
period 4263.113311877816
11.67
0.00010844
2.969e-07
d
yr
n .0844453275489943 2.148e-09 deg/d
Q 5.183016528768447 8.7892e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1188  
   data-arc span      15115 days (41.38 yr)  
   first obs. used      1980-03-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:33  

Additional Information
 Earth MOID = 4.12499 au 
 Jupiter MOID = .0371518 au 
 T_jup = 2.987 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457531.5 (2016-May-23.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .007670684160449011 4.0957e-08  
q 5.095381936403751 2.6568e-07 au
tp 2456024.582278420353
(2012-Apr-07.08227842)
0.0046334 TDB
node 112.7709343463108 4.7598e-05 deg
peri 5.787861044873292 0.00039549 deg
i 6.691792394174991 3.8568e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1188  
   data-arc span      15115 days (41.38 yr)  
   first obs. used      1980-03-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:33  

Additional Information
 Jupiter MOID = .0371518 au 
 T_jup = 2.987 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.677463185350211E-15 -1.044920200648762E-14 -3.450674746327405E-12 -2.027580706328054E-15 -3.254562089738802E-13 -1.128566974685496E-16
q -1.044920200648762E-14 7.058517879985186E-14 1.468900022759177E-10 1.376074132273116E-14 1.282635146771973E-11 2.258574184657326E-15
tp -3.450674746327405E-12 1.468900022759177E-10 2.146800887100389E-5 -6.585884663944416E-10 1.819224427797072E-6 6.394927361176075E-11
node -2.027580706328054E-15 1.376074132273116E-14 -6.585884663944416E-10 2.265606928759885E-9 -2.305589174907692E-9 3.133011525424089E-11
peri -3.254562089738802E-13 1.282635146771973E-11 1.819224427797072E-6 -2.305589174907692E-9 1.564147242536327E-7 -2.565084840724336E-11
i -1.128566974685496E-16 2.258574184657326E-15 6.394927361176075E-11 3.133011525424089E-11 -2.565084840724336E-11 1.487514978107442E-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 11.87   n/a E2021B10  
diameter diameter 21.115 km 0.817 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.091   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

21271 (1996 RF33)          Discovered 1996-Sep-15 by Uppsala-DLR Trojan Survey at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 RF33 = 1997 TC28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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