Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
4351 Nobuhisa (1989 UR1)
Classification: Main-belt Asteroid          SPK-ID: 2004351
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07024427528898965 3.6216e-08  
a 2.85321164605115 1.2862e-08 au
q 2.652789861728182 1.0496e-07 au
i 2.426774194538222 3.7915e-06 deg
node 159.3449917896882 9.0693e-05 deg
peri 244.7571967048414 9.4223e-05 deg
M 43.02595882301475 2.5255e-05 deg
tp 2458390.108851010337
(2018-Sep-28.60885101)
0.00012348 TDB
period 1760.351557715074
4.82
1.1903e-05
3.259e-08
d
yr
n .2045046050161014 1.3828e-09 deg/d
Q 3.053633430374118 1.3765e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2395  
   data-arc span      23387 days (64.03 yr)  
   first obs. used      1955-10-20  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45511  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:35:20  

Additional Information
 Earth MOID = 1.66203 au 
 Jupiter MOID = 2.2299 au 
 T_jup = 3.300 
[ 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 12.6   n/a MPO431547  
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. 2019-January); 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

[ show close-approach data ]
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 | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin