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JPL Small-Body Database Browser
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11221 (1999 JO26)
Classification: Outer Main-belt Asteroid          SPK-ID: 2011221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110898942257466 4.1017e-08  
a 3.220104599608838 2.1002e-08 au
q 2.862383520242453 1.312e-07 au
i 12.5426419715623 5.2108e-06 deg
node 49.56487820622507 2.1274e-05 deg
peri 263.8896129578552 3.3229e-05 deg
M 154.0653952664676 2.7154e-05 deg
tp 2458097.254103006759
(2017-Dec-09.75410301)
0.00015831 TDB
period 2110.58766542067
5.78
2.0648e-05
5.653e-08
d
yr
n .1705686079276157 1.6687e-09 deg/d
Q 3.577825678975224 2.3335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1819  
   data-arc span      15981 days (43.75 yr)  
   first obs. used      1976-05-02  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47546  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:58:38  

Additional Information
 Earth MOID = 1.88456 au 
 Jupiter MOID = 1.75022 au 
 T_jup = 3.142 
[ 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 11.9   n/a MPO250323  
diameter diameter 21.635 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.798 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.039   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11221 (1999 JO26)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 JO26 = 1976 JV1 = 1978 TW8 = 1982 KU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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