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4945 Ikenozenni (1987 SJ)
Classification: Main-belt Asteroid          SPK-ID: 2004945
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3173978304757266 3.4076e-08  
a 2.571291562976361 7.5776e-09 au
q 1.755169199367124 8.8282e-08 au
i 4.898306641943094 4.1213e-06 deg
node 193.7914671307161 2.78e-05 deg
peri 137.5063735956959 2.8469e-05 deg
M 35.22161119653454 4.8809e-06 deg
tp 2459053.156109800043
(2020-Jul-22.65610980)
2.0574e-05 TDB
period 1506.001533433644
4.12
6.6573e-06
1.823e-08
d
yr
n .2390435813031408 1.0567e-09 deg/d
Q 3.387413926585598 9.9827e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2820  
   data-arc span      24246 days (66.38 yr)  
   first obs. used      1954-10-22  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43263  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:58:32  

Additional Information
 Earth MOID = .746819 au 
 Jupiter MOID = 2.02193 au 
 T_jup = 3.352 
[ 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 13.05   n/a E2021B10  
diameter diameter 7.441 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 22.501 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Salvaggio, F.: Marchini, A.; Papini, R. (2017) Minor Planet Bull. 44, 155-156.]
[Ditteon, R.; Adam, A.; Doyel, M.; Gibson, J.; et al. (2018) Minor Planet Bull. 45, 13-16.]
geometric albedo albedo 0.265   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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)

4945 Ikenozenni (1987 SJ)          Discovered 1987-Sep-18 by Suzuki and Urata at Toyota
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 SJ = 1954 UX = 1958 RP = 1979 WF3 = 1979 YQ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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