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2789 Foshan (1956 XA)
Classification: Main-belt Asteroid          SPK-ID: 2002789
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1635864508493005 3.5379e-08  
a 2.227746226765326 5.4892e-09 au
q 1.863317128135866 7.8608e-08 au
i 3.817448145187944 3.7599e-06 deg
node 242.698154028145 4.6874e-05 deg
peri 141.2517372435365 4.7952e-05 deg
M 68.06717565883231 8.8752e-06 deg
tp 2458770.868093330075
(2019-Oct-14.36809333)
3.0068e-05 TDB
period 1214.498553833356
3.33
4.4888e-06
1.229e-08
d
yr
n .2964186320878867 1.0956e-09 deg/d
Q 2.592175325394787 6.3871e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2401  
   data-arc span      41458 days (113.51 yr)  
   first obs. used      1906-10-23  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44565  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:45:06  

Additional Information
 Earth MOID = .868962 au 
 Jupiter MOID = 2.86253 au 
 T_jup = 3.624 
[ 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 13.6   n/a MPO448940  
diameter diameter 4.766 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.264   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2789 Foshan (1956 XA)          Discovered 1956-Dec-06 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1956 XA = 1949 SV = 1969 RU = 1979 SD1 = 1981 EZ8 = A906 UJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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