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18582 (1997 XK9)
Classification: Inner Main-belt Asteroid          SPK-ID: 2018582
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0675450377592329 1.2391e-08  
a 1.858536801109788 3.7013e-09 au
q 1.733001862701903 2.2392e-08 au
i 21.32712023415203 6.7346e-07 deg
node 238.2373138239419 1.4653e-06 deg
peri 39.83701173835489 1.4897e-05 deg
M 118.0162093281689 1.5032e-05 deg
tp 2458897.114839233878
(2020-Feb-17.61483923)
3.8596e-05 TDB
period 925.4547192928264
2.53
2.7646e-06
7.569e-09
d
yr
n .3889979622937026 1.162e-09 deg/d
Q 1.984071739517672 3.9513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2719  
   data-arc span      13384 days (36.64 yr)  
   first obs. used      1984-07-18  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:13  

Additional Information
 Earth MOID = .737265 au 
 Jupiter MOID = 3.06708 au 
 T_jup = 3.911 
[ 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 13.66   n/a E2021B10  
diameter diameter 4.559 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 114. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 39-41.]
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
geometric albedo albedo 0.203   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18582 (1997 XK9)          Discovered 1997-Dec-04 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 XK9 = 1984 ON = 1999 JF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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