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JPL Small-Body Database Browser
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74642 (1999 RJ61)
Classification: Main-belt Asteroid          SPK-ID: 2074642
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1118077299194638 4.7517e-08  
a 2.264166096544268 9.6252e-09 au
q 2.01101482512904 1.0997e-07 au
i 1.888155996425603 5.2647e-06 deg
node 179.0381727890033 0.00010614 deg
peri 187.1576933556424 0.00010748 deg
M 252.4386686070164 1.8354e-05 deg
tp 2458972.304395646851
(2020-May-02.80439565)
6.4645e-05 TDB
period 1244.402432541828
3.41
7.9351e-06
2.173e-08
d
yr
n .2892954807751868 1.8447e-09 deg/d
Q 2.517317367959496 1.0701e-08 au
  Orbit Determination Parameters
   # obs. used (total)      705  
   data-arc span      9353 days (25.61 yr)  
   first obs. used      1994-01-10  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53964  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:43:59  

Additional Information
 Earth MOID = 1.00836 au 
 Jupiter MOID = 2.92344 au 
 T_jup = 3.608 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO235106  
rotation period rot_per 7.471 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]

74642 (1999 RJ61)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RJ61 = 1996 XT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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