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3271 Ul (1982 RB)
Classification: Amor [NEO]          SPK-ID: 2003271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3959939280570294 1.1411e-07  
a 2.10137542443175 3.209e-08 au
q 1.269243515788514 2.3051e-07 au
i 25.07546565305985 1.2992e-05 deg
node 158.8137732327244 1.2436e-05 deg
peri 159.1123017931174 7.8759e-05 deg
M 274.9581675487138 0.00013347 deg
tp 2459659.335491543159
(2022-Mar-20.83549154)
0.00041838 TDB
period 1112.638030345101
3.05
2.5486e-05
6.978e-08
d
yr
n .3235553613858954 7.4114e-09 deg/d
Q 2.933507333074986 4.4797e-08 au
  Orbit Determination Parameters
   # obs. used (total)      222  
   data-arc span      14084 days (38.56 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58738  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:55:01  

Additional Information
 Earth MOID = .275284 au 
 Jupiter MOID = 2.49579 au 
 T_jup = 3.533 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457427.5 (2016-Feb-09.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3959789980785574 1.1439e-07  
q 1.269252490386432 2.3134e-07 au
tp 2457434.050560625659
(2016-Feb-15.55056063)
0.00036971 TDB
node 158.8439278828186 1.2434e-05 deg
peri 159.1093885891681 7.8814e-05 deg
i 25.07494797939558 1.2993e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      222  
   data-arc span      14084 days (38.56 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58738  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:55:01  

Additional Information
 Jupiter MOID = 2.49579 au 
 T_jup = 3.533 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.308467478718426E-14 -2.639768138019114E-14 2.195185270203854E-11 -2.139991975870121E-13 5.128648807948482E-12 1.337747511290473E-13
q -2.639768138019114E-14 5.35159760238111E-14 -3.944387497985204E-11 3.855926541025932E-13 -9.371564948619361E-12 -2.61079167635027E-13
tp 2.195185270203854E-11 -3.944387497985204E-11 1.366821296187337E-7 -1.310756149041114E-9 2.875993972252723E-8 4.377989689928464E-10
node -2.139991975870121E-13 3.855926541025932E-13 -1.310756149041114E-9 1.545955710591142E-10 -4.041736749507254E-10 7.013587632550558E-11
peri 5.128648807948482E-12 -9.371564948619361E-12 2.875993972252723E-8 -4.041736749507254E-10 6.211702868384939E-9 2.796582491022661E-11
i 1.337747511290473E-13 -2.61079167635027E-13 4.377989689928464E-10 7.013587632550558E-11 2.796582491022661E-11 1.688260281562813E-10

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 16.55   n/a MPCxxxxx  

3271 Ul (1982 RB)          Discovered 1982-Sep-14 by Schuster, H.-E. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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