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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1282340967835705 2.2865e-08  
a 2.654725973159441 1.0391e-08 au
q 2.314299585783454 6.0946e-08 au
i 11.69142156611501 1.0318e-06 deg
node 263.031795051029 3.7819e-06 deg
peri 322.3899580760893 1.0865e-05 deg
M 176.4536729326524 8.182e-06 deg
tp 2458426.116345960993
(2018-Nov-03.61634596)
3.3612e-05 TDB
period 1579.89409243096
4.33
9.2755e-06
2.539e-08
d
yr
n .2278633749722256 1.3378e-09 deg/d
Q 2.995152360535426 1.1723e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2510  
   data-arc span      14851 days (40.66 yr)  
   first obs. used      1980-07-12  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4387  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:00:46  

Additional Information
 Earth MOID = 1.31353 au 
 Jupiter MOID = 2.06765 au 
 T_jup = 3.347 
[ 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 12.77   n/a E2021B10  
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

[ show close-approach data ]
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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