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JPL Small-Body Database Browser
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726 Joella (A911 WC)
Classification: Main-belt Asteroid          SPK-ID: 2000726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2847551576208383 3.2283e-08  
a 2.566060261779782 8.1525e-09 au
q 1.83536136747211 8.1628e-08 au
i 15.43557853871114 4.7699e-06 deg
node 241.9849737293312 1.4866e-05 deg
peri 113.2339978698175 1.7831e-05 deg
M 83.07329411081045 1.2079e-05 deg
tp 2458254.036383149203
(2018-May-15.53638315)
4.9597e-05 TDB
period 1501.407924186985
4.11
7.1551e-06
1.959e-08
d
yr
n .2397749433718626 1.1427e-09 deg/d
Q 3.296759156087453 1.0474e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2024  
   data-arc span      32288 days (88.40 yr)  
   first obs. used      1931-07-14  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39247  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:47:32  

Additional Information
 Earth MOID = .892714 au 
 Jupiter MOID = 2.41525 au 
 T_jup = 3.326 
[ 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 10.5   n/a MPO502160 IRAS observations used: 12
diameter diameter 44.02 km 3.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 13.04 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
geometric albedo albedo 0.0539   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12

726 Joella (A911 WC)          Discovered 1911-Nov-22 by Metcalf, J. H. at Winchester
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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