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91207 (1998 XW27)
Classification: Main-belt Asteroid          SPK-ID: 2091207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1276253819632083 3.6979e-08  
a 3.196622638573924 2.7719e-08 au
q 2.788652453333689 1.1744e-07 au
i 9.97408755874025 7.046e-06 deg
node 346.0266249825975 2.5386e-05 deg
peri 54.17355672573459 3.7764e-05 deg
M 294.6697058202511 2.7746e-05 deg
tp 2459379.332819370159
(2021-Jun-13.83281937)
0.00016135 TDB
period 2087.543255170775
5.72
2.7153e-05
7.434e-08
d
yr
n .1724515164456075 2.2431e-09 deg/d
Q 3.60459282381416 3.1257e-08 au
  Orbit Determination Parameters
   # obs. used (total)      880  
   data-arc span      10148 days (27.78 yr)  
   first obs. used      1992-10-19  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56778  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:16:37  

Additional Information
 Earth MOID = 1.8099 au 
 Jupiter MOID = 1.95636 au 
 T_jup = 3.159 
[ show covariance matrix ]

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 13.9   n/a MPO432450  
diameter diameter 10.524 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91207 (1998 XW27)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 XW27 = 2000 EN77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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