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

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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 
[ 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 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 ]
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