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101507 (1998 XG18)
Classification: Main-belt Asteroid          SPK-ID: 2101507
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06968460834200607 5.34e-08  
a 2.793956933132564 2.5705e-08 au
q 2.599261138522789 1.4598e-07 au
i 3.491951374210407 5.7111e-06 deg
node 237.6670636159177 7.8869e-05 deg
peri 166.2228018714168 8.7525e-05 deg
M 234.3087244499105 4.2608e-05 deg
tp 2459596.066993382133
(2022-Jan-16.56699338)
0.00020694 TDB
period 1705.799520923195
4.67
2.354e-05
6.445e-08
d
yr
n .2110447303943223 2.9125e-09 deg/d
Q 2.988652727742339 2.7496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      7450 days (20.40 yr)  
   first obs. used      1998-12-08  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63127  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:00:11  

Additional Information
 Earth MOID = 1.60826 au 
 Jupiter MOID = 2.301 au 
 T_jup = 3.322 
[ 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 15.8   n/a MPO432542  
diameter diameter 4.386 km 0.955 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101507 (1998 XG18)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 XG18 = 2002 RR115 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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