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JPL Small-Body Database Browser
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49782 (1999 XK9)
Classification: Main-belt Asteroid          SPK-ID: 2049782
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2766845944435312 4.4294e-08  
a 2.345163150844407 1.2788e-08 au
q 1.696292635549108 1.0394e-07 au
i 21.73216347033807 7.0208e-06 deg
node 252.1244468595834 1.3307e-05 deg
peri 284.3096600427267 1.8456e-05 deg
M 72.26738657300679 1.3135e-05 deg
tp 2458337.171498381552
(2018-Aug-06.67149838)
4.7221e-05 TDB
period 1311.770981047906
3.59
1.073e-05
2.938e-08
d
yr
n .2744381490375817 2.2447e-09 deg/d
Q 2.994033666139706 1.6326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1003  
   data-arc span      14620 days (40.03 yr)  
   first obs. used      1979-05-01  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50335  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:41:17  

Additional Information
 Earth MOID = .822372 au 
 Jupiter MOID = 2.37828 au 
 T_jup = 3.417 
[ 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 13.8   n/a MPO395471  
diameter diameter 3.940 km 0.530 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.259   0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49782 (1999 XK9)          Discovered 1999-Dec-02 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XK9 = 2001 KM59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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