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136824 Nonamikeiko (1997 RJ5)
Classification: Main-belt Asteroid          SPK-ID: 2136824
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173315097347552 4.4886e-08  
a 2.714866199068985 1.6214e-08 au
q 2.244338899491765 1.2661e-07 au
i 3.962854037745544 4.5871e-06 deg
node 322.0707551643922 6.0111e-05 deg
peri 49.30164334853912 6.1661e-05 deg
M 12.24812865404058 1.295e-05 deg
tp 2458944.911070425072
(2020-Apr-05.41107043)		 5.858e-05 TDB
period 1633.883445563934
4.47		 1.4637e-05
4.007e-08		 d
yr
n .2203339540390203 1.9739e-09 deg/d
Q 3.185393498646205 1.9025e-08 au
   Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      8438 days (23.10 yr)  
   first obs. used      1997-09-08  
   last obs. used      2020-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50233  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 15:49:41  

Additional Information
 Earth MOID = 1.24652 au 
 Jupiter MOID = 2.29743 au 
 T_jup = 3.336 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457049.5 (2015-Jan-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1763454822980746 4.5237e-08  
q 2.235714578956637 1.2804e-07 au
tp 2457308.079361548456
(2015-Oct-12.57936155)		 5.2231e-05 TDB
node 322.3762440896835 6.0065e-05 deg
peri 48.54748531818608 6.1508e-05 deg
i 3.965695104659937 4.593e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      8438 days (23.10 yr)  
   first obs. used      1997-09-08  
   last obs. used      2020-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50233  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 15:49:41  

Additional Information
 Jupiter MOID = 2.29743 au 
 T_jup = 3.336 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.046400745708407E-15 -5.763625711160428E-15 -3.642596690360381E-13 1.478192845245974E-14 -8.610986905192741E-14 -2.754403745976941E-15
q -5.763625711160428E-15 1.639515581165048E-14 1.104110333456139E-12 -4.098876057194173E-14 2.531651875528517E-13 8.1047536021079E-15
tp -3.642596690360381E-13 1.104110333456139E-12 2.728127752856157E-9 1.468362573348953E-12 7.079078801839964E-10 1.127859091842481E-12
node 1.478192845245974E-14 -4.098876057194173E-14 1.468362573348953E-12 3.607788238429404E-9 -3.598104273888531E-9 6.041448146935193E-11
peri -8.610986905192741E-14 2.531651875528517E-13 7.079078801839964E-10 -3.598104273888531E-9 3.783252432848742E-9 -6.003735813995758E-11
i -2.754403745976941E-15 8.1047536021079E-15 1.127859091842481E-12 6.041448146935193E-11 -6.003735813995758E-11 2.109569361552378E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO417724  

136824 Nonamikeiko           Discovered 1997 Sept. 8 by H. Abe at Yatsuka.
Keiko Nonami (b.1960) is a member of Matsue Astronomy Club. She popularizes astronomy in Shimane prefecture and is an observing partner of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12

Alternate Designations
 1997 RJ5 = 2002 XS41 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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