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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110898932314201 4.1306e-08  
a 3.220104600100862 2.1154e-08 au
q 2.862383523881652 1.3242e-07 au
i 12.54264198121941 5.2862e-06 deg
node 49.56487817544654 2.155e-05 deg
peri 263.8896121526453 3.3649e-05 deg
M 154.0653959597597 2.7354e-05 deg
tp 2458097.254098735145
(2017-Dec-09.75409874)
0.00015962 TDB
period 2110.587665904408
5.78
2.0798e-05
5.694e-08
d
yr
n .170568607888522 1.6808e-09 deg/d
Q 3.577825676320072 2.3504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1777  
   data-arc span      15951 days (43.67 yr)  
   first obs. used      1976-05-02  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48037  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:23:57  

Additional Information
 Earth MOID = 1.88456 au 
 Jupiter MOID = 1.75022 au 
 T_jup = 3.142 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456290.5 (2012-Dec-29.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1116368326212629 3.9951e-08  
q 2.856439915986154 1.2721e-07 au
tp 2455962.807046583120
(2012-Feb-05.30704658)
0.00015799 TDB
node 50.16040520794741 2.1564e-05 deg
peri 259.4794609103268 3.3854e-05 deg
i 12.56051570041591 5.2757e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1777  
   data-arc span      15951 days (43.67 yr)  
   first obs. used      1976-05-02  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48037  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:23:57  

Additional Information
 Jupiter MOID = 1.75022 au 
 T_jup = 3.142 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.59611040601867E-15 -5.029531176925146E-15 2.365291582927142E-12 -2.636092227962313E-15 3.829688289378426E-13 2.418326534546055E-15
q -5.029531176925146E-15 1.618265016800596E-14 -7.477030973364312E-12 2.177872144165159E-15 -1.19466758146656E-12 -4.334499338180439E-15
tp 2.365291582927142E-12 -7.477030973364312E-12 2.496109527759231E-8 -2.756232430945148E-11 4.164366916004999E-9 1.118114309668016E-11
node -2.636092227962313E-15 2.177872144165159E-15 -2.756232430945148E-11 4.649861346003093E-10 -4.570103016868187E-10 -4.360272918347668E-11
peri 3.829688289378426E-13 -1.19466758146656E-12 4.164366916004999E-9 -4.570103016868187E-10 1.146123792093615E-9 4.408948543340959E-11
i 2.418326534546055E-15 -4.334499338180439E-15 1.118114309668016E-11 -4.360272918347668E-11 4.408948543340959E-11 2.783332761396809E-11

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

[ 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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