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189458 (1999 RO31)
Classification: Main-belt Asteroid          SPK-ID: 2189458
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1763299072402023 4.7525e-08  
a 2.768615393143323 2.0235e-08 au
q 2.280425697686565 1.3249e-07 au
i 6.057378547356045 4.3321e-06 deg
node 121.9207757008842 4.9349e-05 deg
peri 240.1725502516472 5.1057e-05 deg
M 251.1653991510533 1.6722e-05 deg
tp 2459905.194285230263
(2022-Nov-21.69428523)
8.1596e-05 TDB
period 1682.6445014216
4.61
1.8447e-05
5.051e-08
d
yr
n .2139489355570057 2.3455e-09 deg/d
Q 3.256805088600081 2.3803e-08 au
  Orbit Determination Parameters
   # obs. used (total)      376  
   data-arc span      10280 days (28.15 yr)  
   first obs. used      1993-04-19  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:49:35  

Additional Information
 Earth MOID = 1.28382 au 
 Jupiter MOID = 2.2132 au 
 T_jup = 3.307 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457718.5 (2016-Nov-26.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1750778745193701 4.7515e-08  
q 2.284988394066083 1.3227e-07 au
tp 2458222.040245787879
(2018-Apr-13.54024579)
7.1753e-05 TDB
node 121.9314990786842 4.9348e-05 deg
peri 240.2134761284081 5.1079e-05 deg
i 6.056121741188822 4.3311e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      376  
   data-arc span      10280 days (28.15 yr)  
   first obs. used      1993-04-19  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:49:35  

Additional Information
 Jupiter MOID = 2.2132 au 
 T_jup = 3.307 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.257683983220553E-15 -6.234407804423589E-15 9.119987393507187E-13 9.279895671338958E-15 1.330004001554478E-13 -9.083682097626698E-16
q -6.234407804423589E-15 1.749466019909484E-14 -1.961369111433071E-12 -2.74728326773262E-14 -2.772515469761883E-13 3.215890220221018E-15
tp 9.119987393507187E-13 -1.961369111433071E-12 5.14844610081986E-9 1.506163155815215E-11 9.819686590681921E-10 2.484408858669815E-13
node 9.279895671338958E-15 -2.74728326773262E-14 1.506163155815215E-11 2.435183029659029E-9 -2.418468147738513E-9 5.062511555071713E-13
peri 1.330004001554478E-13 -2.772515469761883E-13 9.819686590681921E-10 -2.418468147738513E-9 2.609060767162215E-9 -4.751732517453002E-13
i -9.083682097626698E-16 3.215890220221018E-15 2.484408858669815E-13 5.062511555071713E-13 -4.751732517453002E-13 1.875885590416038E-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 16.11   n/a MPO637948  

189458 (1999 RO31)          Discovered 1999-Sep-04 by Sarounova, L. at Ondrejov
Reference: 20080819/Numbers.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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