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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05014290409300887 7.9588e-08  
a 2.872451157453689 4.5661e-08 au
q 2.728418114553636 2.4016e-07 au
i 11.10746587091194 9.2767e-06 deg
node 244.7273539597423 2.9687e-05 deg
peri 163.0748085546045 7.7704e-05 deg
M 281.2693616409578 7.5527e-05 deg
tp 2459389.382748952182
(2021-Jun-23.88274895)
0.0003782 TDB
period 1778.186898273853
4.87
4.2399e-05
1.161e-07
d
yr
n .2024534093404155 4.8273e-09 deg/d
Q 3.016484200353741 4.795e-08 au
  Orbit Determination Parameters
   # obs. used (total)      153  
   data-arc span      6858 days (18.78 yr)  
   first obs. used      2001-10-20  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 20:09:40  

Additional Information
 Earth MOID = 1.74112 au 
 Jupiter MOID = 2.2807 au 
 T_jup = 3.268 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457403.5 (2016-Jan-16.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05256898782902095 7.9614e-08  
q 2.721378864867595 2.4167e-07 au
tp 2457598.674692270633
(2016-Jul-29.17469227)
0.00033974 TDB
node 244.7826833099782 2.9647e-05 deg
peri 160.6873131564066 7.4802e-05 deg
i 11.11477593745534 9.2805e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      153  
   data-arc span      6858 days (18.78 yr)  
   first obs. used      2001-10-20  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 20:09:40  

Additional Information
 Jupiter MOID = 2.2807 au 
 T_jup = 3.268 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.338346635354267E-15 -1.894675729247979E-14 5.955877231262405E-12 -3.54300941596101E-14 1.336942209877842E-12 -2.674176293864243E-15
q -1.894675729247979E-14 5.840503848071794E-14 -1.023642744859483E-11 9.700662258228301E-14 -2.514327643406474E-12 1.304485521517245E-14
tp 5.955877231262405E-12 -1.023642744859483E-11 1.154260677224314E-7 -9.985627466547527E-11 2.334981262283642E-8 3.307950244663878E-11
node -3.54300941596101E-14 9.700662258228301E-14 -9.985627466547527E-11 8.789428359887434E-10 -8.821031392831105E-10 5.418195670407224E-11
peri 1.336942209877842E-12 -2.514327643406474E-12 2.334981262283642E-8 -8.821031392831105E-10 5.595315134367431E-9 -4.645358056770745E-11
i -2.674176293864243E-15 1.304485521517245E-14 3.307950244663878E-11 5.418195670407224E-11 -4.645358056770745E-11 8.612827783545666E-11

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 12 CATAB v2.0f-lin.ifort 2020-Aug-25 20:10:23 2020-Aug-25 20:10

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