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181858 (1998 XE7)
Classification: Main-belt Asteroid          SPK-ID: 2181858
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965454133953091 3.3862e-08  
a 2.379940231130159 1.0039e-08 au
q 1.912173894546555 8.0226e-08 au
i 2.340795628719196 4.0798e-06 deg
node 97.93396628163828 0.00013418 deg
peri 223.7040589568996 0.00013512 deg
M 78.5430114237469 1.7394e-05 deg
tp 2458907.914667797952
(2020-Feb-28.41466780)
6.4167e-05 TDB
period 1341.057818937807
3.67
8.4851e-06
2.323e-08
d
yr
n .2684448014964338 1.6985e-09 deg/d
Q 2.847706567713764 1.2012e-08 au
  Orbit Determination Parameters
   # obs. used (total)      411  
   data-arc span      8656 days (23.70 yr)  
   first obs. used      1997-05-01  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57256  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:21  

Additional Information
 Earth MOID = .898366 au 
 Jupiter MOID = 2.46783 au 
 T_jup = 3.511 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.00   n/a E2021B55  

181858 (1998 XE7)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1998 XE7 = 2004 FS155 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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