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JPL Small-Body Database Browser
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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3176047490346593 4.0085e-08  
a 2.572008303653281 1.0434e-08 au
q 1.755126251856421 1.0189e-07 au
i 4.897867715149522 4.7729e-06 deg
node 193.7959591743056 3.8301e-05 deg
peri 137.4973416545587 3.9152e-05 deg
M 347.4196302480331 1.0645e-05 deg
tp 2459053.149940093596
(2020-Jul-22.64994009)
4.4705e-05 TDB
period 1506.631268189171
4.12
9.1679e-06
2.51e-08
d
yr
n .2389436669747908 1.454e-09 deg/d
Q 3.388890355450142 1.3748e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1912  
   data-arc span      23577 days (64.55 yr)  
   first obs. used      1954-10-22  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4855  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:46:38  

Additional Information
 Earth MOID = .748664 au 
 Jupiter MOID = 2.02012 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 13.0   n/a MPO395045  
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. 2019-August); 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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