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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2850985335899309 3.2279e-08  
a 2.565333704969444 8.1597e-09 au
q 1.833960827513831 8.1592e-08 au
i 15.43539145856552 4.7124e-06 deg
node 241.9762734953804 1.4863e-05 deg
peri 113.211492736339 1.7773e-05 deg
M 179.0234836817993 1.2255e-05 deg
tp 2458254.185755394508
(2018-May-15.68575539)
4.9346e-05 TDB
period 1500.770304165923
4.11
7.1604e-06
1.96e-08
d
yr
n .2398768145936068 1.1445e-09 deg/d
Q 3.296706582425057 1.0486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2081  
   data-arc span      32317 days (88.48 yr)  
   first obs. used      1931-07-14  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38576  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:38:28  

Additional Information
 Earth MOID = .89214 au 
 Jupiter MOID = 2.41862 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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