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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1830579333284948 5.5096e-08  
a 2.290045739625842 8.8586e-09 au
q 1.870834699302211 1.2556e-07 au
i 4.77322266636076 5.6307e-06 deg
node 153.7780029911232 4.6337e-05 deg
peri 201.4260611949901 4.7534e-05 deg
M 14.62303858164696 1.0583e-05 deg
tp 2458549.083822405050
(2019-Mar-06.58382240)
3.711e-05 TDB
period 1265.798748381435
3.47
7.3448e-06
2.011e-08
d
yr
n .2844054005112018 1.6503e-09 deg/d
Q 2.709256779949472 1.048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      7178 days (19.65 yr)  
   first obs. used      1998-12-08  
   last obs. used      2018-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5692  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:25:09  

Additional Information
 Earth MOID = .865926 au 
 Jupiter MOID = 2.72498 au 
 T_jup = 3.572 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456687.5 (2014-Jan-30.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1843587288228843 5.5289e-08  
q 1.867286518030789 1.2614e-07 au
tp 2457282.421036054456
(2015-Sep-16.92103605)
3.4808e-05 TDB
node 153.8409662987447 4.629e-05 deg
peri 201.2254817449391 4.746e-05 deg
i 4.776016096154059 5.636e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      7178 days (19.65 yr)  
   first obs. used      1998-12-08  
   last obs. used      2018-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5692  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:25:09  

Additional Information
 Jupiter MOID = 2.72498 au 
 T_jup = 3.572 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.05685586243266E-15 -6.963070327667734E-15 -5.789633859190121E-14 -7.178980361792571E-15 4.369322333113118E-14 -2.806847530530406E-16
q -6.963070327667734E-15 1.591247127419461E-14 1.688195363078187E-13 1.698480275186832E-14 -9.839829903974857E-14 9.084034437193521E-16
tp -5.789633859190121E-14 1.688195363078187E-13 1.211625774718478E-9 4.899003893495052E-13 3.693207152207812E-10 1.925173149457694E-12
node -7.178980361792571E-15 1.698480275186832E-14 4.899003893495052E-13 2.142731152862468E-9 -2.134299988714885E-9 3.639108111076431E-11
peri 4.369322333113118E-14 -9.839829903974857E-14 3.693207152207812E-10 -2.134299988714885E-9 2.252423961690078E-9 -3.57866840200654E-11
i -2.806847530530406E-16 9.084034437193521E-16 1.925173149457694E-12 3.639108111076431E-11 -3.57866840200654E-11 3.176468104374328E-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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