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4351 Nobuhisa (1989 UR1)
Classification: Main-belt Asteroid          SPK-ID: 2004351
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0705475852232121 1.952e-08  
a 2.851689533909535 1.1327e-08 au
q 2.65050972348591 5.5904e-08 au
i 2.427420690814738 1.5201e-06 deg
node 159.3426090119777 2.2028e-05 deg
peri 244.3597263229433 2.4556e-05 deg
M 166.162878698186 1.747e-05 deg
tp 2458388.635977480261
(2018-Sep-27.13597748)
8.3987e-05 TDB
period 1758.943094853212
4.82
1.048e-05
2.869e-08
d
yr
n .204668360820418 1.2194e-09 deg/d
Q 3.05286934433316 1.2126e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2988  
   data-arc span      23895 days (65.42 yr)  
   first obs. used      1955-10-20  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42575  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:34:38  

Additional Information
 Earth MOID = 1.65921 au 
 Jupiter MOID = 2.23112 au 
 T_jup = 3.300 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.72   n/a E2020-QM5  
diameter diameter 8.250 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.919 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 0.259   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4351 Nobuhisa (1989 UR1)          Discovered 1989-Oct-28 by Mizuno and Furuta at Kani
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 UR1 = 1955 UR = 1974 RU = 1977 FG1 = 1977 GV = 1981 AY1 = 1987 HT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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