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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06883977491135868 5.3296e-08  
a 2.794433653166532 2.7132e-08 au
q 2.602065469477822 1.4499e-07 au
i 3.488239855571855 5.7067e-06 deg
node 237.5772020433991 7.9011e-05 deg
peri 166.3334385459491 8.7811e-05 deg
M 276.3980424763765 4.3279e-05 deg
tp 2459596.735220878963
(2022-Jan-17.23522088)		 0.00020864 TDB
period 1706.236118647338
4.67		 2.485e-05
6.804e-08		 d
yr
n .210990727523339 3.0729e-09 deg/d
Q 2.986801836855242 2.9e-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 = 1.61007 au 
 Jupiter MOID = 2.29983 au 
 T_jup = 3.322 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456567.5 (2013-Oct-02.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07174905015661047 5.3472e-08  
q 2.591238899863458 1.4634e-07 au
tp 2456195.248490364709
(2012-Sep-24.74849036)		 0.00017616 TDB
node 237.7130784623292 7.8784e-05 deg
peri 167.5590816629637 8.6964e-05 deg
i 3.494724660973989 5.7167e-06 deg
   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
 Jupiter MOID = 2.29983 au 
 T_jup = 3.322 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.859209927169807E-15 -7.723631588968434E-15 5.011804563992411E-15 -4.694732099380128E-15 -2.489967508930664E-15 1.512315374065572E-15
q -7.723631588968434E-15 2.141565149617788E-14 1.804386347762896E-12 8.326857310624685E-15 4.034752106309859E-13 -3.713821492841294E-15
tp 5.011804563992411E-15 1.804386347762896E-12 3.103116952344721E-8 -4.996251895874555E-11 6.50925737049463E-9 1.731885832286278E-12
node -4.694732099380128E-15 8.326857310624685E-15 -4.996251895874555E-11 6.206976775516809E-9 -6.205742746809367E-9 -9.058932643409223E-11
peri -2.489967508930664E-15 4.034752106309859E-13 6.50925737049463E-9 -6.205742746809367E-9 7.562771068404948E-9 9.080610366178805E-11
i 1.512315374065572E-15 -3.713821492841294E-15 1.731885832286278E-12 -9.058932643409223E-11 9.080610366178805E-11 3.268018205284775E-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 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

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