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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02716162392692582 4.3e-08  
a 5.216058468881686 9.561e-08 au
q 5.074381850369065 2.9077e-07 au
i 5.601787352804725 4.4869e-06 deg
node 113.963726219622 5.3605e-05 deg
peri 333.91047155 0.00012945 deg
M 258.4355768425393 0.00012011 deg
tp 2460228.083970132684
(2023-Oct-10.58397013)
0.0014671 TDB
period 4351.230632823248
11.91
0.00011964
3.276e-07
d
yr
n .08273521455846572 2.2748e-09 deg/d
Q 5.357735087394307 9.8207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1216  
   data-arc span      10817 days (29.62 yr)  
   first obs. used      1991-04-06  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52916  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:18:39  

Additional Information
 Earth MOID = 4.09194 au 
 Jupiter MOID = .152492 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 11.8   n/a MPO492980  
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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