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
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2853079439842592 3.1975e-08  
a 2.564910554030405 8.0175e-09 au
q 1.833121197356463 8.0773e-08 au
i 15.43666232201682 4.1185e-06 deg
node 241.9694609914936 1.4444e-05 deg
peri 113.2262531328274 1.6917e-05 deg
M 226.9993461057739 1.1898e-05 deg
tp 2459754.816797379136
(2022-Jun-24.31679738)
5.113e-05 TDB
period 1500.398992137227
4.11
7.035e-06
1.926e-08
d
yr
n .2399361782342989 1.125e-09 deg/d
Q 3.296699910704347 1.0305e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2531  
   data-arc span      32731 days (89.61 yr)  
   first obs. used      1931-07-14  
   last obs. used      2021-02-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35688  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:20:35  

Additional Information
 Earth MOID = .88997 au 
 Jupiter MOID = 2.41966 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 10.49   n/a E2021B10 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. 2020-October); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 18:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin