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21266 (1996 HL25)
Classification: Main-belt Asteroid          SPK-ID: 2021266
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06396362663222127 2.7482e-08  
a 2.294005124968505 7.0863e-09 au
q 2.147272237662618 6.3355e-08 au
i 1.517880418897666 3.5487e-06 deg
node 116.3444443721048 0.00013333 deg
peri 152.7887058821118 0.00013709 deg
M 50.24248858692529 3.2463e-05 deg
tp 2459219.383653822411
(2021-Jan-04.88365382)
0.0001143 TDB
period 1269.082929951147
3.47
5.8804e-06
1.61e-08
d
yr
n .2836694052876892 1.3144e-09 deg/d
Q 2.440738012274393 7.5396e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1728  
   data-arc span      11249 days (30.80 yr)  
   first obs. used      1990-10-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52829  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:31  

Additional Information
 Earth MOID = 1.13118 au 
 Jupiter MOID = 2.59194 au 
 T_jup = 3.593 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456888.5 (2014-Aug-19.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06396805289183406 2.7526e-08  
q 2.146604356086064 6.3377e-08 au
tp 2456682.127796327811
(2014-Jan-24.62779633)
0.00011269 TDB
node 116.3497469552451 0.00013335 deg
peri 152.7165842835414 0.0001371 deg
i 1.517622608112789 3.5493e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1728  
   data-arc span      11249 days (30.80 yr)  
   first obs. used      1990-10-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52829  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:31  

Additional Information
 Jupiter MOID = 2.59194 au 
 T_jup = 3.593 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.576961797592214E-16 -1.735040054951386E-15 4.43877660746911E-13 2.538485216049606E-15 1.207609467073753E-13 3.643330251232493E-17
q -1.735040054951386E-15 4.016704507709669E-15 -9.657367772787827E-13 -5.416550475704544E-15 -2.61352294677014E-13 -5.48909410701521E-17
tp 4.43877660746911E-13 -9.657367772787827E-13 1.26984289335369E-8 1.936435054844089E-11 3.601413204673839E-9 3.661182206520314E-13
node 2.538485216049606E-15 -5.416550475704544E-15 1.936435054844089E-11 1.778199440586292E-8 -1.777002983629163E-8 1.222862212015571E-10
peri 1.207609467073753E-13 -2.61352294677014E-13 3.601413204673839E-9 -1.777002983629163E-8 1.879677934577226E-8 -1.221402971273624E-10
i 3.643330251232493E-17 -5.48909410701521E-17 3.661182206520314E-13 1.222862212015571E-10 -1.221402971273624E-10 1.259779190879398E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.07   n/a MPO636383  
diameter diameter 2.672 km 0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.271   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21266 (1996 HL25)          Discovered 1996-Apr-20 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 HL25 = 1999 CO50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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