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JPL Small-Body Database Browser
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9601 (1991 UE3)
Classification: Main-belt Asteroid          SPK-ID: 2009601
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1905177264942591 2.6714e-08  
a 2.257344215354579 7.5408e-09 au
q 1.827280127530257 6.075e-08 au
i 7.325140695673371 3.3092e-06 deg
node 76.44546880562464 2.6123e-05 deg
peri 209.1018004200565 2.8048e-05 deg
M 244.6826278408309 1.1676e-05 deg
tp 2459397.314328630653
(2021-Jul-01.81432863)
4.1046e-05 TDB
period 1238.782636408496
3.39
6.2073e-06
1.699e-08
d
yr
n .2906078834328187 1.4562e-09 deg/d
Q 2.6874083031789 8.9774e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2225  
   data-arc span      16523 days (45.24 yr)  
   first obs. used      1974-11-09  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .449  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:23:32  

Additional Information
 Earth MOID = .814815 au 
 Jupiter MOID = 2.4684 au 
 T_jup = 3.588 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456923.5 (2014-Sep-23.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909252636941808 2.6672e-08  
q 1.826319414851349 6.0673e-08 au
tp 2456919.890774582617
(2014-Sep-19.39077458)
3.6993e-05 TDB
node 76.48419462488675 2.6132e-05 deg
peri 209.1300991291574 2.8052e-05 deg
i 7.324385349620418 3.3086e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2225  
   data-arc span      16523 days (45.24 yr)  
   first obs. used      1974-11-09  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .449  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:23:32  

Additional Information
 Jupiter MOID = 2.4684 au 
 T_jup = 3.588 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.114222201398494E-16 -1.610176866379987E-15 -9.082010854864227E-14 -9.951673206098012E-16 -2.333315087072245E-14 7.028971404957412E-16
q -1.610176866379987E-15 3.68120800024625E-15 2.425146668084417E-13 1.655017564964652E-15 6.331940895923543E-14 -1.52823080221923E-15
tp -9.082010854864227E-14 2.425146668084417E-13 1.368476090912742E-9 -9.80838632065028E-12 3.880478979737655E-10 -2.236604045744786E-13
node -9.951673206098012E-16 1.655017564964652E-15 -9.80838632065028E-12 6.828948909955222E-10 -6.796898662424399E-10 -1.277436654950535E-11
peri -2.333315087072245E-14 6.331940895923543E-14 3.880478979737655E-10 -6.796898662424399E-10 7.869159348128956E-10 1.261218062670279E-11
i 7.028971404957412E-16 -1.52823080221923E-15 -2.236604045744786E-13 -1.277436654950535E-11 1.261218062670279E-11 1.094673966527175E-11

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 13.5   n/a MPO347602  
diameter diameter 4.747 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.652   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9601 (1991 UE3)          Discovered 1991-Oct-18 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19981110/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 UE3 = 1974 VZ2 = 1980 JL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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