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15449 (1998 XS30)
Classification: Main-belt Asteroid          SPK-ID: 2015449
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .135118964900688 3.7739e-08  
a 2.619542064478538 1.084e-08 au
q 2.265592252212387 1.0085e-07 au
i 12.23518654653912 4.1379e-06 deg
node 251.9210708094722 1.7673e-05 deg
peri 277.3311181153773 2.3414e-05 deg
M 344.5645193785584 1.5346e-05 deg
tp 2459266.897870049130
(2021-Feb-21.39787005)
6.601e-05 TDB
period 1548.590147849519
4.24
9.6123e-06
2.632e-08
d
yr
n .2324695146097379 1.443e-09 deg/d
Q 2.97349187674469 1.2305e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1925  
   data-arc span      14293 days (39.13 yr)  
   first obs. used      1981-12-04  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:24:03  

Additional Information
 Earth MOID = 1.30916 au 
 Jupiter MOID = 2.1647 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457374.5 (2015-Dec-18.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1353714024408489 3.794e-08  
q 2.264208345505625 1.0142e-07 au
tp 2457720.696940091254
(2016-Nov-28.19694009)
6.6296e-05 TDB
node 251.9619499785661 1.7686e-05 deg
peri 277.792751563462 2.3346e-05 deg
i 12.23143319152867 4.1369e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1925  
   data-arc span      14293 days (39.13 yr)  
   first obs. used      1981-12-04  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:24:03  

Additional Information
 Jupiter MOID = 2.1647 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.439471676062141E-15 -3.831966618587627E-15 5.874656232457035E-13 -2.197376308615975E-15 1.840263430318086E-13 1.275965894015487E-15
q -3.831966618587627E-15 1.028604486481592E-14 -1.63701939198587E-12 6.51155104837255E-15 -5.131178709893074E-13 -3.101774964893836E-15
tp 5.874656232457035E-13 -1.63701939198587E-12 4.395220707740899E-9 1.525952707726875E-12 1.02094613811535E-9 -2.415804381590902E-12
node -2.197376308615975E-15 6.51155104837255E-15 1.525952707726875E-12 3.128038895708778E-10 -3.0506226148867E-10 -1.495376966312592E-11
peri 1.840263430318086E-13 -5.131178709893074E-13 1.02094613811535E-9 -3.0506226148867E-10 5.450468192018462E-10 1.413911225728079E-11
i 1.275965894015487E-15 -3.101774964893836E-15 -2.415804381590902E-12 -1.495376966312592E-11 1.413911225728079E-11 1.711412408916562E-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 13.82   n/a E2021B10  
diameter diameter 4.835 km 0.182 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.330   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15449 (1998 XS30)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1994-Nov-11 21:58 < 00:01 Vesta 0.0309345203077136 0.0309337877468337 0.0309352528698703 6.40985375440072 6.40985315432908 2449668.414959856 0.636022029506922 152.239571940733 36.3893539142908 89.0552250966093 126941.919389936 T 37 CATAB v2.0f-lin.ifort 2021-Feb-24 02:24:07 2021-Feb-24 02:24

Alternate Designations
 1998 XS30 = 1981 XE1 = 1996 LE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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