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22049 (1999 XW257)
Classification: Jupiter Trojan          SPK-ID: 2022049
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05915710036447798 3.6311e-08  
a 5.232660532402538 9.4814e-08 au
q 4.923111508113958 2.2385e-07 au
i 2.568861029537064 4.965e-06 deg
node 202.909030350086 0.00010884 deg
peri 251.3119956241809 0.00012161 deg
M 249.8052042505091 5.7792e-05 deg
tp 2460538.761092155292
(2024-Aug-16.26109216)
0.00072483 TDB
period 4372.021291015742
11.97
0.00011883
3.253e-07
d
yr
n .0823417765004438 2.238e-09 deg/d
Q 5.542209556691118 1.0042e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1161  
   data-arc span      11222 days (30.72 yr)  
   first obs. used      1990-04-16  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:58:28  

Additional Information
 Earth MOID = 3.94072 au 
 Jupiter MOID = .00976351 au 
 T_jup = 2.994 
[ 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 11.83   n/a E2021B10  
diameter diameter 19.101 km 0.799 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.111   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

22049 (1999 XW257)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XW257 = 1990 HF4 = 1996 RR30 = 1997 TK28 = 1998 WW40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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