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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3959257095875142 1.1475e-07  
a 2.101645379269634 3.2692e-08 au
q 1.269549941180984 2.3157e-07 au
i 25.07347506183316 1.2998e-05 deg
node 158.8131060727625 1.3201e-05 deg
peri 159.093743746306 7.9515e-05 deg
M 211.5742075647428 0.00013404 deg
tp 2459659.322237317444
(2022-Mar-20.82223732)
0.00042476 TDB
period 1112.852441103383
3.05
2.5966e-05
7.109e-08
d
yr
n .3234930227075418 7.5481e-09 deg/d
Q 2.933740817358284 4.5636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      199  
   data-arc span      14035 days (38.43 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-17 05:22:26  

Additional Information
 Earth MOID = .274532 au 
 Jupiter MOID = 2.49576 au 
 T_jup = 3.533 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457133.5 (2015-Apr-21.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3958558996511716 1.1497e-07  
q 1.269626499924289 2.32e-07 au
tp 2457434.052442776981
(2016-Feb-15.55244278)
0.00037503 TDB
node 158.8432996532977 1.3198e-05 deg
peri 159.0887220180926 7.9527e-05 deg
i 25.07407812504193 1.2999e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      199  
   data-arc span      14035 days (38.43 yr)  
   first obs. used      1982-09-14  
   last obs. used      2021-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-17 05:22:26  

Additional Information
 Jupiter MOID = 2.49576 au 
 T_jup = 3.533 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.32171318467285E-14 -2.660211588137204E-14 2.265197686382274E-11 -1.933414204229037E-13 5.231847976556581E-12 1.340627186113282E-13
q -2.660211588137204E-14 5.382188014819287E-14 -4.051453215689912E-11 3.442826099986953E-13 -9.516409094512377E-12 -2.609547325128298E-13
tp 2.265197686382274E-11 -4.051453215689912E-11 1.40643790326207E-7 -1.236313338865019E-9 2.939809560025085E-8 4.391852302187121E-10
node -1.933414204229037E-13 3.442826099986953E-13 -1.236313338865019E-9 1.741987100967715E-10 -4.055511851245481E-10 7.139291226505063E-11
peri 5.231847976556581E-12 -9.516409094512377E-12 2.939809560025085E-8 -4.055511851245481E-10 6.324611504829489E-9 2.687138552241148E-11
i 1.340627186113282E-13 -2.609547325128298E-13 4.391852302187121E-10 7.139291226505063E-11 2.687138552241148E-11 1.689815865672492E-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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