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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
4503 Cleobulus (1989 WM)
Classification: Amor [NEO]          SPK-ID: 2004503
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 212 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5242390195218297 2.7801e-08  
a 2.705224074486506 6.4468e-09 au
q 1.287040058090851 7.6835e-08 au
i 2.512828559933354 4.9274e-06 deg
node 45.95571142488239 7.8301e-05 deg
peri 76.30175744427981 7.8559e-05 deg
M 20.75445880201872 6.3986e-06 deg
tp 2459302.805908443126
(2021-Mar-29.30590844)
2.8576e-05 TDB
period 1625.186822852443
4.45
5.8094e-06
1.591e-08
d
yr
n .2215129946526066 7.9183e-10 deg/d
Q 4.123408090882161 9.8264e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1247  
   data-arc span      14766 days (40.43 yr)  
   first obs. used      1980-12-30  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50531  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-05 05:49:39  

Additional Information
 Earth MOID = .307105 au 
 Jupiter MOID = .994793 au 
 T_jup = 3.150 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457683.5 (2016-Oct-22.0) TDB
Reference: JPL 212 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5229853305435813 2.7864e-08  
q 1.291090203170537 7.6981e-08 au
tp 2457678.402270223203
(2016-Oct-16.90227022)
2.3596e-05 TDB
node 46.00629931178451 7.8207e-05 deg
peri 76.37263476361615 7.8467e-05 deg
i 2.513614315101236 4.9269e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1247  
   data-arc span      14766 days (40.43 yr)  
   first obs. used      1980-12-30  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50531  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-05 05:49:39  

Additional Information
 Jupiter MOID = .994793 au 
 T_jup = 3.150 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.763847764833387E-16 -2.14390316703937E-15 -2.634485229841851E-13 3.293601429471848E-14 -5.609175337231099E-14 -4.711831177776444E-15
q -2.14390316703937E-15 5.926079352066375E-15 7.714781727371402E-13 -9.352364252936418E-14 1.707526520368539E-13 1.333585530483514E-14
tp -2.634485229841851E-13 7.714781727371402E-13 5.567585761789239E-10 -1.704065266865735E-11 1.660220023831977E-10 1.866184680116273E-12
node 3.293601429471848E-14 -9.352364252936418E-14 -1.704065266865735E-11 6.116295138390642E-9 -6.110876854685728E-9 -1.359478161498268E-10
peri -5.609175337231099E-14 1.707526520368539E-13 1.660220023831977E-10 -6.110876854685728E-9 6.157084122029402E-9 1.358162902752235E-10
i -4.711831177776444E-15 1.333585530483514E-14 1.866184680116273E-12 -1.359478161498268E-10 1.358162902752235E-10 2.427479426826859E-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 15.78   n/a MPO636132  
rotation period rot_per 3.13 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:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
SMASSII spectral type spec_B Sq   n/a Binzel et al. (2004) Icarus 170, 259-294  

4503 Cleobulus (1989 WM)          Discovered 1989-Nov-28 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WM = 1980 YS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-26 08:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin