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22009 (1999 XK77)
Classification: Jupiter Trojan          SPK-ID: 2022009
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02782000812959208 4.2863e-08  
a 5.214614370593357 9.5318e-08 au
q 5.069543756410762 2.898e-07 au
i 5.601774603252112 4.4812e-06 deg
node 113.9626887785315 5.3613e-05 deg
peri 334.5855906789656 0.00012703 deg
M 290.6096392714597 0.00011787 deg
tp 2460234.855787952087
(2023-Oct-17.35578795)
0.0014348 TDB
period 4349.423759928911
11.91
0.00011925
3.265e-07
d
yr
n .08276958509232128 2.2694e-09 deg/d
Q 5.359684984775952 9.7969e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1230  
   data-arc span      10902 days (29.85 yr)  
   first obs. used      1991-04-06  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52908  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:57:35  

Additional Information
 Earth MOID = 4.08713 au 
 Jupiter MOID = .155965 au 
 T_jup = 2.990 
[ 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 11.76   n/a E2021B10  
diameter diameter 21.915 km 0.278 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.084   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

22009 (1999 XK77)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XK77 = 1994 NR9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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