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5507 Niijima (1987 UJ)
Classification: Main-belt Asteroid          SPK-ID: 2005507
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1346123199275888 3.9337e-08  
a 2.579697149314244 7.7428e-09 au
q 2.232438131334467 1.0251e-07 au
i 2.643438422967935 3.8732e-06 deg
node 337.4547965977199 7.5131e-05 deg
peri 21.54039447473655 7.6112e-05 deg
M 338.1281602591977 1.1278e-05 deg
tp 2459092.446314666402
(2020-Aug-30.94631467)
4.7342e-05 TDB
period 1513.392273908935
4.14
6.8135e-06
1.865e-08
d
yr
n .2378761978678254 1.071e-09 deg/d
Q 2.926956167294022 8.7851e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2191  
   data-arc span      13515 days (37.00 yr)  
   first obs. used      1983-11-07  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47338  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:22:41  

Additional Information
 Earth MOID = 1.22892 au 
 Jupiter MOID = 2.51522 au 
 T_jup = 3.411 
[ 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 13.7   n/a MPO473842  
diameter diameter 5.522 km 0.381 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5507 Niijima (1987 UJ)          Discovered 1987-Oct-21 by Suzuki and Urata at Toyota
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 UJ = 1983 VN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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