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JPL Small-Body Database Browser
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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1733150858479642 4.5393e-08  
a 2.714866193803293 1.638e-08 au
q 2.244338926358539 1.2823e-07 au
i 3.96285225085278 4.6116e-06 deg
node 322.0707593361217 6.0176e-05 deg
peri 49.30164291588714 6.1723e-05 deg
M 12.2481250174553 1.2982e-05 deg
tp 2458944.911087091679
(2020-Apr-05.41108709)
5.872e-05 TDB
period 1633.88344081037
4.47
1.4787e-05
4.048e-08
d
yr
n .2203339546800523 1.9941e-09 deg/d
Q 3.185393461248046 1.9219e-08 au
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      8028 days (21.98 yr)  
   first obs. used      1997-09-08  
   last obs. used      2019-09-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50278  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:28:11  

Additional Information
 Earth MOID = 1.24652 au 
 Jupiter MOID = 2.29743 au 
 T_jup = 3.336 
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Orbital Elements at Epoch 2457034.5 (2015-Jan-12.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .176351202784983 4.5745e-08  
q 2.235698122584786 1.2967e-07 au
tp 2457308.081606062484
(2015-Oct-12.58160606)
5.2262e-05 TDB
node 322.3763394788512 6.013e-05 deg
peri 48.54866293019236 6.1571e-05 deg
i 3.96568211800998 4.6176e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      8028 days (21.98 yr)  
   first obs. used      1997-09-08  
   last obs. used      2019-09-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50278  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:28:11  

Additional Information
 Jupiter MOID = 2.29743 au 
 T_jup = 3.336 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.092649808903669E-15 -5.902830248643923E-15 -3.767418582333937E-13 1.486094970043853E-14 -8.707901270398959E-14 -2.856262785606086E-15
q -5.902830248643923E-15 1.68141062836849E-14 1.141732518112223E-12 -4.120628149287659E-14 2.560875236862578E-13 8.414628358263568E-15
tp -3.767418582333937E-13 1.141732518112223E-12 2.731342130125586E-9 1.681447151937056E-12 7.078962748471115E-10 1.195253082847883E-12
node 1.486094970043853E-14 -4.120628149287659E-14 1.681447151937056E-12 3.615618049442473E-9 -3.605855193168679E-9 6.173527541723372E-11
peri -8.707901270398959E-14 2.560875236862578E-13 7.078962748471115E-10 -3.605855193168679E-9 3.79093123552058E-9 -6.134249541125425E-11
i -2.856262785606086E-15 8.414628358263568E-15 1.195253082847883E-12 6.173527541723372E-11 -6.134249541125425E-11 2.132178897082462E-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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