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21308 (1996 XG5)
Classification: Main-belt Asteroid          SPK-ID: 2021308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044545993135591 3.2058e-08  
a 2.35891558103803 8.3713e-09 au
q 2.112515999206191 7.5432e-08 au
i 3.18894361177975 3.7236e-06 deg
node 61.31701138433269 6.5142e-05 deg
peri 24.46815927346568 6.7833e-05 deg
M 277.8602758504592 1.8685e-05 deg
tp 2459698.437993461370
(2022-Apr-28.93799346)
6.9103e-05 TDB
period 1323.32654840917
3.62
7.0443e-06
1.929e-08
d
yr
n .2720416970646982 1.4481e-09 deg/d
Q 2.605315162869869 9.2457e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1488  
   data-arc span      8650 days (23.68 yr)  
   first obs. used      1996-12-02  
   last obs. used      2020-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48181  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:43:08  

Additional Information
 Earth MOID = 1.12915 au 
 Jupiter MOID = 2.55998 au 
 T_jup = 3.543 
[ 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 15.21   n/a E2021B10  
diameter diameter 2.554 km 0.432 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.297   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21308 (1996 XG5)          Discovered 1996-Dec-02 by Antolini, P., Castellani, F. at Pleiade
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 XG5 = 1998 KC24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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