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6607 Matsushima (1991 UL2)
Classification: Main-belt Asteroid          SPK-ID: 2006607
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1116758334073494 2.8857e-08  
a 2.624597482453888 9.9267e-09 au
q 2.331493371242019 7.8557e-08 au
i 4.690665728337795 3.6646e-06 deg
node 117.11687617 3.967e-05 deg
peri 282.8003427156674 4.3649e-05 deg
M 264.0106959558452 1.9014e-05 deg
tp 2459414.607247018465
(2021-Jul-19.10724702)
8.2788e-05 TDB
period 1553.075214068348
4.25
8.811e-06
2.412e-08
d
yr
n .2317981748333773 1.3151e-09 deg/d
Q 2.917701593665758 1.1035e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2613  
   data-arc span      16826 days (46.07 yr)  
   first obs. used      1974-10-23  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44524  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:27:41  

Additional Information
 Earth MOID = 1.34497 au 
 Jupiter MOID = 2.45891 au 
 T_jup = 3.389 
[ 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 12.7   n/a MPO473857  
diameter diameter 7.359 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.359 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.358   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6607 Matsushima (1991 UL2)          Discovered 1991-Oct-29 by Endate, K., Watanabe, K. at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1991 UL2 = 1974 UL = 1989 GK8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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