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21265 (1996 HJ23)
Classification: Main-belt Asteroid          SPK-ID: 2021265
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2629965272452564 3.229e-08  
a 2.341784863965301 7.7815e-09 au
q 1.725903577186922 7.7962e-08 au
i 3.091044350211721 3.1801e-06 deg
node 142.2250707727341 5.9163e-05 deg
peri 212.2703969095144 5.9404e-05 deg
M 264.0317525802937 7.6129e-06 deg
tp 2459745.434556626900
(2022-Jun-14.93455663)
2.8761e-05 TDB
period 1308.937526349883
3.58
6.5242e-06
1.786e-08
d
yr
n .2750322248028902 1.3709e-09 deg/d
Q 2.95766615074368 9.828e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1549  
   data-arc span      13654 days (37.38 yr)  
   first obs. used      1984-01-25  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51908  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:32:01  

Additional Information
 Earth MOID = .721105 au 
 Jupiter MOID = 2.48645 au 
 T_jup = 3.515 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.91   n/a E2021B10  
diameter diameter 2.771 km 0.736 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.303   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21265 (1996 HJ23)          Discovered 1996-Apr-20 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 HJ23 = 1984 BU2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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