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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3958679905578755 1.1545e-07  
a 2.101721574837919 3.3365e-08 au
q 1.269717278294699 2.3266e-07 au
i 25.07050320069282 1.3037e-05 deg
node 158.8162171124268 1.3938e-05 deg
peri 159.0775475968039 8.1532e-05 deg
M 146.9061921165789 0.00013526 deg
tp 2458546.350540673569
(2019-Mar-03.85054067)
0.00040764 TDB
period 1112.91296167947
3.05
2.6502e-05
7.256e-08
d
yr
n .3234754310496417 7.7029e-09 deg/d
Q 2.93372587138114 4.6574e-08 au
  Orbit Determination Parameters
   # obs. used (total)      191  
   data-arc span      14005 days (38.34 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-18 06:07:42  

Additional Information
 Earth MOID = .276557 au 
 Jupiter MOID = 2.49547 au 
 T_jup = 3.533 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456981.5 (2014-Nov-20.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3956160408179989 1.154e-07  
q 1.270509014572791 2.326e-07 au
tp 2457434.066392320509
(2016-Feb-15.56639232)
0.00038268 TDB
node 158.8421777772432 1.3936e-05 deg
peri 159.0496077615709 8.1572e-05 deg
i 25.06811774858668 1.3036e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      191  
   data-arc span      14005 days (38.34 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-18 06:07:42  

Additional Information
 Jupiter MOID = 2.49547 au 
 T_jup = 3.533 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.331686894052983E-14 -2.676884506147738E-14 2.345329022553512E-11 -2.423429442380394E-13 5.425689625695656E-12 1.231842339096588E-13
q -2.676884506147738E-14 5.410161004057994E-14 -4.186921633765064E-11 4.317987464229461E-13 -9.848496725183556E-12 -2.414434976716961E-13
tp 2.345329022553512E-11 -4.186921633765064E-11 1.464464382269944E-7 -1.521332693872095E-9 3.075771227322661E-8 3.819705099526667E-10
node -2.423429442380394E-13 4.317987464229461E-13 -1.521332693872095E-9 1.941991203674502E-10 -4.804374091080199E-10 7.58660972969222E-11
peri 5.425689625695656E-12 -9.848496725183556E-12 3.075771227322661E-8 -4.804374091080199E-10 6.654019068312921E-9 1.117280024721522E-11
i 1.231842339096588E-13 -2.414434976716961E-13 3.819705099526667E-10 7.58660972969222E-11 1.117280024721522E-11 1.699314144166361E-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 16.4   n/a MPO435729  

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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