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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344581691657777 1.9453e-08  
a 2.579241534394881 7.4221e-09 au
q 2.232441439843814 5.0751e-08 au
i 2.643574971714018 4.367e-07 deg
node 337.4550343847234 2.0687e-05 deg
peri 21.59232460733221 2.4155e-05 deg
M 25.67062198425387 6.632e-06 deg
tp 2459092.612696588647
(2020-Aug-31.11269659)
2.7883e-05 TDB
period 1512.991358445113
4.14
6.5307e-06
1.788e-08
d
yr
n .2379392307765515 1.027e-09 deg/d
Q 2.926041628945948 8.42e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2409  
   data-arc span      13635 days (37.33 yr)  
   first obs. used      1983-11-07  
   last obs. used      2021-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46886  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 17:49:04  

Additional Information
 Earth MOID = 1.22728 au 
 Jupiter MOID = 2.5168 au 
 T_jup = 3.411 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457324.5 (2015-Oct-29.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1362974518729319 1.9609e-08  
q 2.227596431323065 5.1318e-08 au
tp 2457580.669342423618
(2016-Jul-11.16934242)
2.8338e-05 TDB
node 337.5897072210016 2.0692e-05 deg
peri 21.83124306546773 2.4095e-05 deg
i 2.643595879187959 4.3659e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2409  
   data-arc span      13635 days (37.33 yr)  
   first obs. used      1983-11-07  
   last obs. used      2021-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46886  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 17:49:04  

Additional Information
 Jupiter MOID = 2.5168 au 
 T_jup = 3.411 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.844942610132332E-16 -9.983293306260922E-16 2.737120924456678E-13 4.35428618804988E-14 5.272679001150575E-14 2.247103927729911E-15
q -9.983293306260922E-16 2.633486436975457E-15 -7.552456571943475E-13 -1.051627604401286E-13 -1.572361931792446E-13 -5.883952435193865E-15
tp 2.737120924456678E-13 -7.552456571943475E-13 8.03029308441932E-10 -2.187301725068405E-10 4.30422280282795E-10 1.637359014825556E-12
node 4.35428618804988E-14 -1.051627604401286E-13 -2.187301725068405E-10 4.281778025313906E-10 -4.751500292877487E-10 -3.932143519192857E-13
peri 5.272679001150575E-14 -1.572361931792446E-13 4.30422280282795E-10 -4.751500292877487E-10 5.805817528858722E-10 8.299605807747335E-13
i 2.247103927729911E-15 -5.883952435193865E-15 1.637359014825556E-12 -3.932143519192857E-13 8.299605807747335E-13 1.906117665860785E-13

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

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