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85816 (1998 XG)
Classification: Main-belt Asteroid          SPK-ID: 2085816
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1832772170015827 5.2765e-08  
a 2.290273773709831 8.8397e-09 au
q 1.870518770292581 1.1999e-07 au
i 4.77356756320284 5.5011e-06 deg
node 153.7697741994742 4.5915e-05 deg
peri 201.4465911451468 4.711e-05 deg
M 128.3402062742966 1.0809e-05 deg
tp 2458549.174617400063
(2019-Mar-06.67461740)
3.7067e-05 TDB
period 1265.987818257992
3.47
7.3295e-06
2.007e-08
d
yr
n .2843629257786717 1.6463e-09 deg/d
Q 2.710028777127082 1.046e-08 au
  Orbit Determination Parameters
   # obs. used (total)      700  
   data-arc span      7726 days (21.15 yr)  
   first obs. used      1998-12-08  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:14  

Additional Information
 Earth MOID = .866515 au 
 Jupiter MOID = 2.72787 au 
 T_jup = 3.572 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456728.5 (2014-Mar-12.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1843501995616702 5.2955e-08  
q 1.867332991639896 1.2051e-07 au
tp 2457282.388041710927
(2015-Sep-16.88804171)
3.4797e-05 TDB
node 153.8407481600603 4.5874e-05 deg
peri 201.2163888179014 4.7046e-05 deg
i 4.77598290179212 5.5058e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      700  
   data-arc span      7726 days (21.15 yr)  
   first obs. used      1998-12-08  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:14  

Additional Information
 Jupiter MOID = 2.72787 au 
 T_jup = 3.572 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.804259092057787E-15 -6.370457784658742E-15 -7.515100899775363E-14 -6.100909898862084E-15 2.212399880192789E-14 1.137314237853121E-17
q -6.370457784658742E-15 1.452215178773806E-14 2.096451959645883E-13 1.441740639660044E-14 -4.761614055670332E-14 2.079945878475502E-16
tp -7.515100899775363E-14 2.096451959645883E-13 1.210852964936675E-9 -6.608761894680561E-13 3.691517211463714E-10 1.692133601942527E-12
node -6.100909898862084E-15 1.441740639660044E-14 -6.608761894680561E-13 2.104441966632483E-9 -2.096452479910429E-9 2.902350789123601E-11
peri 2.212399880192789E-14 -4.761614055670332E-14 3.691517211463714E-10 -2.096452479910429E-9 2.213357614979803E-9 -2.850158771213264E-11
i 1.137314237853121E-17 2.079945878475502E-16 1.692133601942527E-12 2.902350789123601E-11 -2.850158771213264E-11 3.031430414340161E-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 16.0   n/a MPO406650  

85816 (1998 XG)          Discovered 1998-Dec-08 by Klet at Klet
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 XG = 2001 OM49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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