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101501 (1998 XR8)
Classification: Main-belt Asteroid          SPK-ID: 2101501
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .121393834196837 4.139e-08  
a 2.226128115447044 9.3646e-09 au
q 1.955889888099549 9.4289e-08 au
i 5.131903503726675 3.6187e-06 deg
node 104.6827430605688 6.0542e-05 deg
peri 149.8126833915157 6.3809e-05 deg
M 336.5167122387566 2.0427e-05 deg
tp 2459079.637086645363
(2020-Aug-18.13708665)
6.8767e-05 TDB
period 1213.175577541969
3.32
7.6551e-06
2.096e-08
d
yr
n .2967418786400239 1.8724e-09 deg/d
Q 2.49636634279454 1.0501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      402  
   data-arc span      7919 days (21.68 yr)  
   first obs. used      1998-12-12  
   last obs. used      2020-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55284  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:00:14  

Additional Information
 Earth MOID = .942911 au 
 Jupiter MOID = 2.54183 au 
 T_jup = 3.631 
[ 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 16.7   n/a MPO453468  
diameter diameter 1.403 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.188   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101501 (1998 XR8)          Discovered 1998-Dec-12 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 XR8 = 2004 SP12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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