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312870 (2011 UA161)
Classification: Main-belt Asteroid          SPK-ID: 2312870
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05014286921486723 8.1067e-08  
a 2.872451160991554 4.7382e-08 au
q 2.728418218099861 2.4231e-07 au
i 11.10746648574785 9.6122e-06 deg
node 244.7273381085047 2.9735e-05 deg
peri 163.0748467214772 8.0008e-05 deg
M 281.2693369364308 7.8541e-05 deg
tp 2459389.382871696376
(2021-Jun-23.88287170)
0.00039359 TDB
period 1778.186901559018
4.87
4.3998e-05
1.205e-07
d
yr
n .2024534089663867 5.0093e-09 deg/d
Q 3.016484103883247 4.9758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      145  
   data-arc span      6513 days (17.83 yr)  
   first obs. used      2001-10-20  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63634  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:30  

Additional Information
 Earth MOID = 1.74112 au 
 Jupiter MOID = 2.2807 au 
 T_jup = 3.268 
[ show covariance matrix ]

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 16.3   n/a MPO437380  

312870 (2011 UA161)          Discovered 2001-Oct-20 by NEAT at Palomar
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2168-Jan-15 09:31 00:07 Europ 0.0355946115969165 0.0355419791055476 0.0356476721841609 5.31568404158603 5.31568398541294 2512919.896224742 6.89498754206319 6697.43398929758 99.5093324671877 -66.8536247485529 49185.058256047 T 11 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:32 2019-Sep-24 06:02

Alternate Designations
 2011 UA161 = 2010 JJ86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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