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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09447865594629253 5.0646e-08  
a 3.194964902470528 2.3641e-08 au
q 2.893108912689534 1.6081e-07 au
i 5.718644749439177 4.1238e-06 deg
node 108.0623015758032 5.0242e-05 deg
peri 243.2318555962376 5.4967e-05 deg
M 86.66575599838191 2.1001e-05 deg
tp 2458698.339447572073
(2019-Aug-02.83944757)
0.00012225 TDB
period 2085.919597556261
5.71
2.3152e-05
6.339e-08
d
yr
n .1725857508706254 1.9155e-09 deg/d
Q 3.496820892251521 2.5874e-08 au
  Orbit Determination Parameters
   # obs. used (total)      980  
   data-arc span      10694 days (29.28 yr)  
   first obs. used      1991-11-03  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:37:04  

Additional Information
 Earth MOID = 1.89108 au 
 Jupiter MOID = 1.9044 au 
 T_jup = 3.181 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09721049817930551 5.2083e-08  
q 2.881538396548761 1.659e-07 au
tp 2456590.796205799463
(2013-Oct-25.29620580)
0.00011975 TDB
node 108.4691848400974 5.02e-05 deg
peri 239.3310084938784 5.4427e-05 deg
i 5.723210465791661 4.1328e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      980  
   data-arc span      10694 days (29.28 yr)  
   first obs. used      1991-11-03  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:37:04  

Additional Information
 Jupiter MOID = 1.9044 au 
 T_jup = 3.181 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.712666692315494E-15 -8.572093887591477E-15 -7.569798232434126E-14 6.288068657544632E-15 -1.01441088195823E-13 -1.820161127654898E-15
q -8.572093887591477E-15 2.75215656736613E-14 -3.858876859804969E-13 -1.836877035765947E-14 2.289738872218659E-13 6.943920142887011E-15
tp -7.569798232434126E-14 -3.858876859804969E-13 1.434110868846071E-8 -2.256509786310977E-11 2.55290703379949E-9 1.662968939124593E-14
node 6.288068657544632E-15 -1.836877035765947E-14 -2.256509786310977E-11 2.520013169245399E-9 -2.511129413219307E-9 4.045824314084358E-11
peri -1.01441088195823E-13 2.289738872218659E-13 2.55290703379949E-9 -2.511129413219307E-9 2.96227630289203E-9 -4.022648329960242E-11
i -1.820161127654898E-15 6.943920142887011E-15 1.662968939124593E-14 4.045824314084358E-11 -4.022648329960242E-11 1.708040543529924E-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 14.3   n/a MPO453206  

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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