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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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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 .1344581344210342 3.923e-08  
a 2.579241532820476 7.6341e-09 au
q 2.232441528096186 1.022e-07 au
i 2.643579849563504 3.7944e-06 deg
node 337.4550289872034 7.5005e-05 deg
peri 21.59234155957911 7.5982e-05 deg
M 25.67061033436331 1.1149e-05 deg
tp 2459092.612745649052
(2020-Aug-31.11274565)
4.6945e-05 TDB
period 1512.991357059787
4.14
6.7173e-06
1.839e-08
d
yr
n .2379392309944137 1.0564e-09 deg/d
Q 2.926041537544766 8.6606e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2341  
   data-arc span      13585 days (37.19 yr)  
   first obs. used      1983-11-07  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46711  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:25:12  

Additional Information
 Earth MOID = 1.22728 au 
 Jupiter MOID = 2.5168 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 13.75   n/a E2021B10  
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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