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4039 Souseki (1987 SH)
Classification: Main-belt Asteroid          SPK-ID: 2004039
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06190974853470995 3.5584e-08  
a 2.417099360183189 7.8575e-09 au
q 2.26745734661084 8.6053e-08 au
i 5.043966045636658 3.525e-06 deg
node 275.4600450172369 4.9451e-05 deg
peri 125.8919825804341 5.9852e-05 deg
M 213.7959065857572 3.3584e-05 deg
tp 2459557.938824731920
(2021-Dec-09.43882473)
0.00012851 TDB
period 1372.587950290191
3.76
6.693e-06
1.832e-08
d
yr
n .2622782750816726 1.2789e-09 deg/d
Q 2.566741373755539 8.344e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2579  
   data-arc span      23781 days (65.11 yr)  
   first obs. used      1954-12-22  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42559  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:02:29  

Additional Information
 Earth MOID = 1.28038 au 
 Jupiter MOID = 2.67089 au 
 T_jup = 3.508 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO337285  
diameter diameter 6.634 km 0.703 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.77196 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2018) Minor Planet Bull. 45, 135-137.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.473   0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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)

4039 Souseki (1987 SH)          Discovered 1987-Sep-17 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 SH = 1961 VD1 = 1972 RG1 = 1983 RL7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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