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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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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1109300060914135 4.1663e-08  
a 3.219673643732932 2.1244e-08 au
q 2.862515226821274 1.3391e-07 au
i 12.54509404295021 5.3851e-06 deg
node 49.57305895430382 2.1953e-05 deg
peri 263.7500366720646 3.4322e-05 deg
M 85.99675206366803 2.7672e-05 deg
tp 2458096.424309306980
(2017-Dec-08.92430931)
0.00016195 TDB
period 2110.163980555187
5.78
2.0884e-05
5.718e-08
d
yr
n .170602855189142 1.6885e-09 deg/d
Q 3.57683206064459 2.36e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1746  
   data-arc span      15921 days (43.59 yr)  
   first obs. used      1976-05-02  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4818  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:13:24  

Additional Information
 Earth MOID = 1.88389 au 
 Jupiter MOID = 1.74942 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-January); 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

[ show close-approach data ]
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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