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JPL Small-Body Database Browser
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(1998 KY26)
Classification: Apollo [NEO]          SPK-ID: 3012392
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2018039375990914 7.8712e-08  
a 1.232844632813547 2.5837e-08 au
q .9840517314638673 1.1171e-07 au
i 1.481007104108706 4.1852e-06 deg
node 84.36615177197216 2.5211e-05 deg
peri 209.3849970184078 5.2974e-05 deg
M 284.6184512841202 6.2467e-05 deg
tp 2459501.194412726605
(2021-Oct-13.69441273)
8.5185e-05 TDB
period 499.989576011963
1.37
1.5717e-05
4.303e-08
d
yr
n .7200150108557192 2.2634e-08 deg/d
Q 1.481637534163227 3.105e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.460264437832022E-13 4.249E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
NN [SET] 0. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      75  
   # delay obs. used      2  
   # Doppler obs. used      2  
   data-arc span      8234 days (22.54 yr)  
   first obs. used      1998-05-31  
   last obs. used      2020-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52729  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Jan-06 09:32:32  

Additional Information
 Earth MOID = .00248324 au 
 Jupiter MOID = 3.66409 au 
 T_jup = 5.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452884.5 (2003-Sep-02.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2015089597335499 8.655e-08  
q .9838794375983455 9.2843e-08 au
tp 2453004.307957555078
(2003-Dec-30.80795756)
8.7838e-05 TDB
node 84.45101790040049 2.5111e-05 deg
peri 209.2134381762163 5.5086e-05 deg
i 1.481165092528287 4.1821e-06 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.460264437832022E-13 4.249E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
NN [SET] 0. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      75  
   # delay obs. used      2  
   # Doppler obs. used      2  
   data-arc span      8234 days (22.54 yr)  
   first obs. used      1998-05-31  
   last obs. used      2020-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52729  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Jan-06 09:32:32  

Additional Information
 Jupiter MOID = 3.66409 au 
 T_jup = 5.174 
Orbit Covariance (7×7)
  e q tp node peri i A2
e 7.49094972707295E-15 -8.013183695424155E-15 7.363492476785439E-12 -4.799496404162076E-13 4.090296491801157E-12 1.522866230055741E-13 -2.628712427452071E-21
q -8.013183695424155E-15 8.619758693206661E-15 -7.726321098103108E-12 5.627877483816711E-13 -4.470071960951728E-12 -1.716186445181322E-13 2.613176810393574E-21
tp 7.363492476785439E-12 -7.726321098103108E-12 7.715516583456365E-9 -3.411496083288421E-10 3.751045318978143E-9 1.255804801909404E-10 -3.214443945618389E-18
node -4.799496404162076E-13 5.627877483816711E-13 -3.411496083288421E-10 6.305434922326429E-10 -9.388544837047149E-10 -1.007797598827279E-10 -6.002246284586851E-20
peri 4.090296491801157E-12 -4.470071960951728E-12 3.751045318978143E-9 -9.388544837047149E-10 3.034508948295584E-9 1.864835845279663E-10 -1.011926726540247E-18
i 1.522866230055741E-13 -1.716186445181322E-13 1.255804801909404E-10 -1.007797598827279E-10 1.864835845279663E-10 1.748982259135248E-11 -1.381192991722094E-20
A2 -2.628712427452071E-21 2.613176810393574E-21 -3.214443945618389E-18 -6.002246284586851E-20 -1.011926726540247E-18 -1.381192991722094E-20 1.805591317642911E-27

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 25.60   n/a MPO598751  
diameter diameter 0.03 km n/a S.J. Ostro et al. (1999) Science v.285, pp.557-559 effective diameter bound: 20-40m
rotation period rot_per 0.1784 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Hicks, M.; Weissman, P.; Rabinowitz, D.L.; Chamberlin, A.B.; Buratti, B.J.; Lee, C.O. (1998) Bull. Amer. Astron. Soc. 30, 1029.]
[Pravec, P.; Sarounova, L. (1998) IAUC 6941. (1998 KY26)]
[Ostro, S.J.; Pravec, P.; Benner, L.A.M.; Hudson, R.S.; et al. (1999) Science 285, 557-559.]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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