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78491 (2002 RQ61)
Classification: Main-belt Asteroid          SPK-ID: 2078491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09452653320882375 5.0595e-08  
a 3.195518382418745 2.368e-08 au
q 2.893457107923632 1.6066e-07 au
i 5.718376833608405 4.1223e-06 deg
node 108.0622962748708 5.0136e-05 deg
peri 243.3482619005007 5.4859e-05 deg
M 120.3586919081302 2.0951e-05 deg
tp 2458698.933902139919
(2019-Aug-03.43390214)
0.00012215 TDB
period 2086.461652651659
5.71
2.3192e-05
6.35e-08
d
yr
n .1725409137246689 1.9179e-09 deg/d
Q 3.497579656913856 2.5918e-08 au
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      10728 days (29.37 yr)  
   first obs. used      1991-11-03  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55358  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:48:39  

Additional Information
 Earth MOID = 1.89242 au 
 Jupiter MOID = 1.90367 au 
 T_jup = 3.181 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457128.5 (2015-Apr-16.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09720379539066748 5.2038e-08  
q 2.881586279074071 1.657e-07 au
tp 2456590.815933934318
(2013-Oct-25.31593393)
0.00011969 TDB
node 108.4692354521032 5.0092e-05 deg
peri 239.3362434484326 5.4322e-05 deg
i 5.723194394556482 4.1314e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      10728 days (29.37 yr)  
   first obs. used      1991-11-03  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55358  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:48:39  

Additional Information
 Jupiter MOID = 1.90367 au 
 T_jup = 3.181 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.707974066446764E-15 -8.554702446098257E-15 -8.437342315598301E-14 6.283925867499897E-15 -1.029787825564286E-13 -1.817145085426422E-15
q -8.554702446098257E-15 2.745722983727303E-14 -3.544322251776372E-13 -1.837660051418339E-14 2.346124160323371E-13 6.930933394750374E-15
tp -8.437342315598301E-14 -3.544322251776372E-13 1.432609251865145E-8 -2.198823504232054E-11 2.549688096742458E-9 3.826961435883168E-14
node 6.283925867499897E-15 -1.837660051418339E-14 -2.198823504232054E-11 2.509205836270078E-9 -2.500271201871626E-9 4.023738772805712E-11
peri -1.029787825564286E-13 2.346124160323371E-13 2.549688096742458E-9 -2.500271201871626E-9 2.950901033178588E-9 -4.000278359617724E-11
i -1.817145085426422E-15 6.930933394750374E-15 3.826961435883168E-14 4.023738772805712E-11 -4.000278359617724E-11 1.706883175877295E-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 14.33   n/a MPCxxxxx  

78491 (2002 RQ61)          Discovered 2002-Sep-05 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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