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15520 (1999 XK98)
Classification: Main-belt Asteroid          SPK-ID: 2015520
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1283968754486983 3.4818e-08  
a 2.654424762290818 1.0741e-08 au
q 2.313604916699024 9.2298e-08 au
i 11.69176983023259 3.5646e-06 deg
node 263.0290479574414 1.9132e-05 deg
peri 322.4111914739477 2.4202e-05 deg
M 130.8455204891914 1.6511e-05 deg
tp 2458426.369769026030
(2018-Nov-03.86976903)
7.1361e-05 TDB
period 1579.625212830292
4.32
9.5877e-06
2.625e-08
d
yr
n .2279021612696156 1.3833e-09 deg/d
Q 2.995244607882613 1.212e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2319  
   data-arc span      14738 days (40.35 yr)  
   first obs. used      1980-07-12  
   last obs. used      2020-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43542  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:00:10  

Additional Information
 Earth MOID = 1.31411 au 
 Jupiter MOID = 2.06863 au 
 T_jup = 3.348 
[ 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 12.7   n/a MPO350926  
diameter diameter 8.641 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.7904 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Clark, M. (2016) Minor Planet Bull. 43, 132-135.]
geometric albedo albedo 0.237   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

15520 (1999 XK98)          Discovered 1999-Dec-07 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
2130-Jan-14 09:36 00:01 Europ 0.0250723424237273 0.0250639345816254 0.0250807620988007 5.91166157741796 5.91166150571003 2499039.900047069 1.00202245121645 957.599152672925 29.9500821782998 64.080626665954 112610.83175527 T 40 CATAB v2.0f-lin.ifort 2020-Dec-18 03:00:16 2020-Dec-18 03:00

Alternate Designations
 1999 XK98 = 1990 VX11 = 1993 MM = 1998 QF90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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